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the nodules. Whorls 16, straight at the sides, encircled above at
the suture witb a prominent series of acute tubercles, and below
these by two or three other rows, which are much less elevated and
d istin c t; they aro also spirally striate-sulcate. Tbo body-whorl
has a swelling (scarcely a varix) on tbe left side opposite the outer
lip, terminates in a narrow and much recurved canal, and is sculptured
witb about ten narrow sulci. Columella bearing a conspicuous
callus reflexed over the cauda, and armed within with a single submedian
plait. Aperture oblique, produced above into a short, narrow
channel. Labrum only a very little thickened. Length 30 millim.,
diam. 9.
Seychelles, in 4 -1 2 fms., and Cerf Island, Mascarenes, in 10 fms.
This speciea bears some resemblance to O. articulatum, Adams
and lleeve, especially as regards tbe aperture. I t may be distinguished
by tbe prominent row of acute nodules ju st below tbe
suture, the corresponding series in O. articulatum being smaller, so
th at the whorls at this part are narrower than below, whilst, on the
contrary, in tbe present species they are widest.
70. Ceritbium (Rhinoclavis) kocbi, Philippi.
Poivre Island and He des Roches, Amirantes, in 13-20 fms.
71. Tripboris mirificus. (P la te XLIY. figs. T -Tb)
Deshayes, AIoll. M6union, p. 104, pi. 11. figs. 32,33.
Etoile Island, in 13 fms.
This is a most curious species, on account of the prominent canal
behind tbe aperture. Tbe apex of the spire in tbe single specimen
at hand, consisting of four whorls, is yellowish brown and finely
cancellated instead of noduled like the rest of the shell.
72. Tripboris monilifer.
Hinds, Voy. ‘ Sulphur,’ p. 30, pi. 8. fig. 14.
Etoile Island, in 13 fms.; Straits of Malacca {Hinds).
73. Tripboris elegans.
Hinds, Voy. ‘ Sulphur,’ p. 29, pi. 8. fig. 11.
Distribution tbe same as preceding species.
74. Tripboris maxillaris.
Hinds, Voy. ‘ Sulphur,’ p. 29, pi. 8. fig. 8.
Darros Island, in 22 fms.; also Straits of Malacca {Hinds).
75. Strombus mauritiauus, Lamarck.
Marie-Louise Island.
i iii:
76. Strombus gibberulus, Linné.
Seychelles,4 -12 fms.; He des Roches, Amirantes; and Mozambique.
77. Strombus floridus, Lamarck.
African Island and Darros Island, on the shore.
78. Strombus columba, Lamarck.
Poivre Island, Amirantes.
79. Pterocera aurantia, Lamarck.
Providence Island, Mascarenes.
80. Calyptræa cicatricosa.
Reeve, Conch. Icon. figs. 3 a, 3 b.
Providence Reef, Mascarenes ; Philippines {Cuming).
81. Nerita plexa, Chemnitz.
Eagle Island, Amirantes. . .
A specimen from this locality is of unusnally large size, having
an extreme diameter of 56 millim.
82. Nerita plicata, Chemnitz.
Eagle Island and He des Roches, Amirantes.
83. Nerita polita, Linné.
Ile des Roches.
84. Nerita albicilla, Linné.
Poivre and Darros Islands, Amirantes.
85. Neritina (Smaragdia) rangiana, Récluz.
Providence Reef, Mascarenes.
86. Turbo histrio.
Reeve, Conch. Icon. vol. iv. fig. 32 ; Fhilippi, Conch.-Cab. p. 78, pi. 18.
fig. 6; F Kiener, Coq. Viv. pi. 33. fig. 3.
African and Darros Islands. i
Tbe locality of this species has not, I believe, been previously
recorded. The type is a white shell broadly rayed above with a
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