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58. Ranella pusilla, var.
Sej"chclles, 4 -12 fms. ; also Darros Island, in 22 fms.
The variety from the Seychelles is white, stained with purple on
tlie posterior side of the varices, and with pinkish brown at the top
of the body-wborl at the suture. Tbe last whorl has also a bright
pink band low down on tbe dorsal side, a spot of the same colour
on the middle of each lateral varix, and a black extremity. Tbe
mouth of the aperture is of a pretty purple-pink colour, armed with
seven white tubercles on the outer lip, and four or five on tbe
inner.
59. Triton (Persona) cancellimis, Boissy.
Var. = Triton decipiens, Reeve, Conch. Icon. fig. 102.
Providence Reef, Mascarenes, in 24 fms.
60. Natica tessellata.
Rhilijyh, Conch.-Cab. ed. 2, p. 48, pi. 7. fig. 7.
Mozambique, between tide-marks.
Tbe exact localitj" of this species has not, I believe, been hitherto
known.
61. Cypræa asellus, Linné.
Seychelles, in 4 -1 2 fms.
62. Trivia scabriuscula, Oray.
African Island, Amirantes.
63. Erato corrugata, Hinds.
Eagle Island, Amirantes, in 12 fms.
I fail to discover any distinction between this species and E.
n am , Duclos. I t is of a greenish-yellow colour, having the anterior
extremity and sometimes the apex of tbe spire rose-tinted.
Tbe surface is granulated tbrougbout, tbe granules being elongate,
and down tbe dorsal surface there is a conspicuous deep groove.
Reeve’s figure (Concb. Icon. fig. 12) does not apparently represent this
species.
64. Littorina glabrata, Philippi.
Eagle Island, Amirantes.
65. Cerithium ecbinatum, Lamarck.
African and Darros Islands, on tbe shore.
66. Ceritbium columna, Soiverhy.
African Island.
67. Cerithium albovaricosum. (P late XLIV. fig. Q.)
Ceritbium gracile, Pease (non Lamarck), Proc. Zool. Soc, I860, p. 432.
Shell thin, elongate-pyramidal, whitish or livid white, sparsely
spotted between tbe costæ Avith small narroAV lines. AVhorls about
14, convex at tbe sides, separated by a deep, subcanaliculate suture,
slowly increasing, longitudinally finely costate, and spirally lirate,
exhibiting at irregular subdistant intervals larger snow-white
varices. Costæ about ten to fifteen on tbe upper whorls, and
somewhat nodulous through being crossed by tbe fine transverse
liræ, of which there are about four principal ones, several finer in tervening.
Last wborl with a prominent varix at tbe left side
opposite tbe labrum, which is thinnish and somewhat expanded
and grooved within. Aperture roundish ovate, oblique, contracted
anteriorly into a narroAV also oblique canal, sometimes (not always)
stained witb black. Columella weU incurved, covered witb a thin
callosity bearing an elongate transverse tubercle at the upper part.
Length 1 4 /millim., diam. 4 /.
Providence Reef, Mascarenes, in 24 fms. ; Sandwich Islands
(JPease).
C. rostratum of Sowerby is allied to this species, but may be distinguished
by its more angular whorls, different costæ, less deep
suture, and the different and more regular dotting between tbe
nodules round tbe middle of tbe whorls. Specimens from tbe Sandwich
Islands of this species in the British Museum have not a black
anterior canal, and tbe costæ are rather finer than in tbe Mascarene
specimen.
68. Ceritbium amirantium. (P late XLIV. fig. E.)
Shell small, elongate, light pink, faintly dotted witb brown.
Whorls about 12, slightly convex, nodulously costate, spirally lirate,
exhibiting at distant intervals paler thickish varices. Costæ about
15 on tbe upper whorls, crossed by two principal transverse liræ,
which are nodulous upon tbe ribs, giving tbe whorls a biangulate
appearance at tbe sides. In addition to these two there are several
(about seven) finer liræ, but which scarcely form nodules upon tbo
costæ. Tbe body-whorl has the usual varix on tbe left side well
developed, swollen. Tbe aperture, is round-ovate, acuminate above
and prolonged anteriorly into an oblique, short, recurved canal.
Columella arcuate, coated with a rosy callus, oearing an elongate
transverse tubercle above. Labrum thickened by a small external
varix. Length 15 millim., diam. 4 /. .
Darros Island, Amirantes, in 22 fms.
This pretty little species agrees with C. tenellum, Sowerby, iu
colour, but is narroAver and differently sculptured.
69 Cerithium (Rhinoclavis) acutinodulosum.
(P late XLIV. fig. S.)
Shell elongate-pyramidal, white, spotted Avitb brown between
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