1+ 11
I a ;
■ ?
I?'FM
Ml í _ ■ llH Ki9 K|«lil
P
l ï
m.,
M : ' iiiUiw-
^ i miiiilll
è ' ' \ "
j
Mli;
nilfi;";
iriic;:;:“
te H il
il. ' ! :
;ii...j :
li" ..lüïi L«i« ;
Mî ■ î:,
j . U -
■ lEi.
D :,i'.
iteiri
^ ?
[D' shows the naked calcareous axis of one of its branches.]
D". Portion of D', x 6. Prom Port Molle.
Pig. E. Acabaria serrata. Portion of larger specimen in spirit, nat.
size. E'. Portion of second joint above first bifurcation,
of same specimen, from Port Darwin, 7 -12 fms., x 6.
F. Iciligorgia orientalis. Typo specimen, in spirit, reduced to
one half nat. size. F'. Portion of left-hand branch, the
margin as seen from the side, showing the depressions for
the zooids and tho common groove which contains them,
X 2. E". Portion of main stem ju s t below bifurcation,
from front, showing four exsert zooids. Erom Torres Straits,
10 fms.
P l a t e X X X V III.
Fig. a. Alopsella clavigera, cortical clavate, a', cortical bifurcate,
and a" & a'", Blattkeule spicules, x 100.
b. Alelitodes cdbitincta, fusiform, and b', small nodular cortical
spicules, X 100.
c. Acaharia serrata, long, and c', short verruca-spicules ; c",
short, and c'", long cortical fusiform spicules. All x 150.
d. Echinomuricea indo-mcdaceensis: d & d', chief forms of the
toothed spicule of the verruca, (7''& di”, cortical spicules.
All x 7 0 .
e. Iciligorgia orientalis. Chief forms of spicules, X 70.
/ . Psilacabaria gracillima, cortical, / & / " , verruca-spicules,
X 70. [The ridged cortical spicule has been omitted.]
g. Plexaura prælonga, var. typica, radiate, and g', Blattkeule
cortical spicules, x 7 0 .
h. Plexaura prælonga, var. cinerea, Blattkeule cortical spicule,
x 7 0 .
SPONGES.
P l a t e XXXIX.
Fig. A. Stelispongus excavatus. Type specimen (dry) from Arafura
Sea. Reduced to one half nat. size.
Fig. B. Stelispongus imqjlexus. The most symmetrical of three
specimens from coral-reef. Port MoUe ; dry. Xat. size.
C. Siphonochcdina hullata. Left-hand half of largest dry specimen
from Port Curtis, showing two completed tubes, and
behind them (c) the margin of an incomplete one. Reduced
two thirds nat. size.
D. Reniera testudinaria. Small part of large dry specimen from
4 fms.. Port Denison, showing the lobes and ridges which
characterize the surface of the species. Reduced to two
thirds nat. size.
E. Rhisochalina spathulifera. The type (dry) specimen from
Thursday Island, 4 -5 fms. Reduced to two thirds nat.
size. [The lower part overrun hy the filiform stolons of a
Hydroid Zoophyte.]
E. R . cancdis. Dry specimen, one of the types, from Port Darwin,
8 -12 fms. [The lower end of the figure shows th at one
end of the canaliform Sponge has been broken off and the
centre of the specimen coated hy a calcareous Polyzoon
{Cellepora).~\ Reduced to two thirds nat. size.
G. Toxochalina robusta. Terminal branches of a spirit-specimen
from Port Jackson; upper surface, showing vents.
Reduced to two thirds nat. size.
H. Claclochcdina suharmigera. P a rt of a specimen in spirit
from Warrior Reef, Torres Straits, seen from above,
showing vents and short and scanty spines. Xat. size.
I. Gelliodes fihulata. One of tho larger and more ramose
specimens, exhibiting several anastomoses of the branches.
D r y ; from Thursday Island, 3 -5 fms. Reduced to two
thirds nat. size.
J . Pellina muricata. P a rt of the type specimen, in spirit, from
Port Darwin, between tide-marks, showing serial arrangement
of the hispid cloacal tubes to form a wall-like ridge.
Xat. size.
K. Rhaphidophlus procerus. The largest spirit-specimen from
Port Darwin, 7 -1 2 fms. [The basal portion includes a
!i!
Mil
f j IlD
||t
li