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522 COLLECTIONS FEOM TH E W E ST ERN IN D IA N OCEAN,
throeus as figured by Von Martens, reacbiug to tbe distal end of tbe
inner margin, wbicb is toothed as in S. eri/throens; itbis joint has a
convex shining prominence a t its outer and distal angle. The merus-
joint is less deeply excavated where it is articulated with the ischium
than in S. erythroeus, and, as already stated, there is a tooth in tbe
notch on the inner margin where the carpus-joint is articulated
with it, and its extero-distal angle is produced and acute ; tbe lobe
on tbe inner margin of tbo exognath is acute. The chelipedes (in
tbe male) are of moderate length ; merus and carpus granulated ;
palm granulated above, and with a longitudinal series of granules
on its outer and inner surface ; fingers arcuated and meeting (in
tbe adult) only toward the apices, where they are denticulated.
Tbe ambulatory legs are sleuder and decrease in length from the
first to the last, the first pair being much elongated. Colour (in
spirit) yellowish or purplish. Length of carapace (without rostrum)
9 lines (19 millim.).
6. Paramithrax (Chlorinoides) longispinus, De Haan,
var. bitubercnlatns.
An adult but small male from Darros Island, 22 fms. (No. 185),
and two small males and a female obtained at Providence Island,
19 fms. (No. 217), are referred to tbis species, wbicb has evidently
a wide Oriental distribution.
They are distinguished from P. hngispinus as figured by De Haan
merely by having tbe lower (immobile) finger as well as the dactylus
armed witb a tooth or tubercle on its inner margin in tho males,
and the upper margin of tbe palm straight and entire, not dentated;
tbe spines of the carapace and legs are small. Tbe anterior prse-
orbital spine is more or less recurved, as in De Haan’s figure of the
Japanese type.
From P. coppingeri, Haswell, referred to in the first part of
tbis Report, tbis species is distinguished not merely by tbe form of
the chelipedes, but by tbe less elongated carapace and ambulatory
legs.
7. Hyastenus (Chorilia) oryx, A . AI.-Edw.
Two females and two small males are in tbe collection from
Providence Island, 19 fms. (No. 217).
These specimens are of iuterest as showing tho wide Oriental
distribution of tbis species, wbicb bad not previously been recorded,
I believe, from tbe AVestern division of the Indo-Pacific Region. I t
has already been noticed in the first part of tbis Report (p. 195).
8. Hyastenus (Chorilia) ovatus.
Labaina ovata, Dana, Amer. Journ. Sci. (§• Arts, ser. 2, xi. p. 269
(1851) ; U.S Expl. Exped., Crust, i. p. 92, pi. iii. fig. 1 (1863).
A small bnt adult female is referred to tbis species from Poivre
CRUSTACEA. 523
Island, or He des Roches, 13-20 fms. (No. 183), and a small male
from Darros Island, 22 fms. (No. 233).
Dana’s types were from the Hawaiian Islands ; hence this species,
which was previously unrepresented in the Aluseum collection, is
evidently distributed tbrougbout tbe Oriental Region.
I t appears to be very distinctly characterized by tbe slender and
very divaricate rostral horns, aud the strong spines of tbe pterygostomian
regions and basal antennal joints. In the specimens
before me, tbe carapace beneath, the pubescence is obviously tuberculated,
and it is not so broadly ovate as in Dana’s figure ; as in
th a t figure, there are small lateral epibranchial and intestinal
spines.
There is, I think, no sufficient reason for separating tbis form,
even as a snbgenns, from Chorilia.
In a female from African or Eagle Islands, 10 fms. (No. 184), tbe
carapace is still narrower, less distinctly tuberculated, and has
scarcely any trace of the epibranchial and no intestinal spine ; tbe
spines of the rostrum are longer, exceeding the carapace in length ;
the spines of tbe basal antennal joints and pterygostomian regions
shorter (the latter subeqnal). This I will designate L. ovata, var.
tenuirostris.
9. Naxia (Naxioides) petersii, Hilgendorf.
A young specimen is in the collection, from Alarie-Louise Island,
17 fms. (No. 186).
Two specimens of tbis species are in tbe British-Aluseum collection
without special locality {H.Al.S. ‘ Samarang ’). Dr. Hilgeudorf’s
specimen was from Alozamhique.
As I have elsewhere noted *, this species is very probably identical
witb tbe earlier described N. hirta, A. M.-Edwards, from Zanzibar.
10. Enrynome stimpsonii. (P late NLA"!!. fig. A.)
Tbe carapace is of a rather narrow-pyriform shape ; the spines of
the rostrum rather short, very slightly divergent, and shaped nearly
as in Eurynome aspera ; there are usually two small spinules on
the front of the gastric region, and always a strong spine on each
branchial region. The surface of the carapace has besides several
broadly dilated, laminate, fiattened expansions, which, when examined
witb a lens of sufficient power, are seen to be themselves
granulated one (longitudinal) on the gastric, one (posteriorly
emarginate, and bearing a strong dorsal spine) on the cardiac, one
(transverse) on the intestinal, one on tbe hepatic, and four on the
branchial region grouped around the branchial spine ; also one on
the posterior margin of the carapace ; tbeir form will be best understood
by a reference to the figure. The postocular tooth or lobe is
prominent aud triangulate ; there is a small ridge or prominence on
Proc. Zool. Soc. 1882, p. 341.
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