176 
Couina. (Nov. gen.) 
Shell elongated, slender, acuminated, tumid in the middle, taper- 
ing at each end, whorls rounded, longitudinally ribbed, transversely 
striated ; aperture oval, canal short, recurved; columella oblique, 
outer lip expanded, reflected. 
Colina macrostoma, Hinds.—Cerithium macrostoma, Hinds, Zool. 
Voy. Sulphur. 
This genus is chiefly known by its being tumid in the middle, and 
by its expanded outer lip. 
Coxina puptrormis, A. Adams. (Pl. XX. fig. 14.) C. testa 
elongato-turrita, acuminata, apice truncata, in medio tumida, 
pallide fulva, anfractibus convexiusculis, in medio subangu- 
latis, suturis tuberculis moniliformibus, costis longitudinalibus, 
et liris transversis, elevatis, (ad costas tuberculatis) ornatis, 
costis in anfractu ultimo obsoletis ; apertura elongato-ovali ; 
columella obliqua, simplici ; labro antice expanso. 
Hab. Dumaguete, Philippines. Mus. Cuming. 
Hipponyx Granuxata, A. Adams. (Pl. XX. fig. 3.) H. testa 
capuliformi, lateribus compressis, apice postico, valde declinato, 
rufescente, granis albis, oblongis, in seriebus longitudinalibus 
dispositis, ornata, transversim lineis concentricis subflecuosis 
striata; basi convexo, antice et postice sinuato ; aperture mar- 
gine crenulato ; intus rufo-fusca. 
Hab. West coast of Africa. Mus. Cuming. 
This curiously-formed species of Hipponyx was attached to the 
spine of a Cidaris: it forms an oblong testaceous plate with thick- 
ened edges, and the margin of the aperture is adapted to the semi- 
cylindrical surface of attachment. At first sight this species has very 
much the appearance of a Pedicularia. 
7. A Monocrarnu or PyRAMIDELLA, A GENUS OF GASTEROPO- 
pous MoLuusca, BELONGING TO THE FamiILy PyrRAMIDEL- 
tip&. By Artuur Apams, F.L.S. 
(Mollusca, Pl. XX.) 
Genus PyramMIpDELLA, Lamarck. 
Tentacles auriform, dilated, eyes sessile at their inner bases; mantle 
with a short anterior siphonal fold; operculum elongate, transverse, 
subspiral at one end, the columellar margin sinuated. 
Shell turreted, longitudinally ribbed ; spire elevated, whorls angu- 
lated, numerous; aperture semioval, anteriorly subcanaliculated ; 
columella curved, with three plaits, outer lip acute. 
In this analysis the genus Pyramidella is restricted to the longi- 
tudinally ribbed species: the smooth ones form the genus Odeliscus. 
Our information regarding the animal is derived from a specimen 
