Mr. R. B. Hinds's Descriptions of new Shells. 255 crebris ; elytris ovatis, thorace paulo latioribus, tuberculis minutis crebris obsitis. Long. corp. 2^ — 3+ lin. This species is a trifle less than the last, from which it may be distinguished by the very minute size of the scales with which it is covered, or as it were powdered, for they do not completely cover the body ; the minute tubercles on the thorax and elytra are free from scales ; the abdomen beneath is rather sparingly furnished with whitish hairs. The legs are shorter, and the femora are less clavate than in Ap. adspersus. XXXVII. — Descriptions of new Shells from the Collection of Captain Sir Edward Belcher, R.N.,, C.B. By Richard Brinsley Hinds, Esq., Surgeon R.N. [Continued from p. 21 .] Mitra Belcher i. Testa fusiformi, turrita, elongata, solida ; anfracti-bus lawigatis, transversim insequaliter sulcatis vel exaratis, divi-sionibus duabus superioribus majoribus ; epidermide nigro induta sed infra lactea ; columella quadriplicata ; labio externo tenui. Axis 48 lin. Geog. Gulfs of Nicoya and Papagayo, Central America ; dredged from a muddy floor in 17 fathoms. This fine shell approaches in size the largest species of the genus, and is surpassed by none in symmetry and outline. In shape it is fusiform and turreted, the spire rather produced, and the last whorl not occupying more than half the entire length. The shell itself is milky white, but is everywhere covered by a smooth black epidermis. The whorls are ploughed with deep channels or sulci at unequal distances, of which the two superior divisions have the greatest breadth, but the inferior of the two is the broadest; and they overlap each other more than is usual in the genus. The columella is fur-nished with four plaits, the upper being somewhat distant, and the lower not very distinct. The outer lip is thin and uneven, by reason of the sulci which terminate on its margin ; the inner is slightly developed. The shell is named after the Commander of the expedition, and, handsome as it is, commemorates but feebly his devotion to conchology. Two specimens, an adult and a young shell, are in the collection ; a third is in my own collection, and I know of the existence of no others. Ranella Calif ornica. Testa ovata, ventricosa, fusca ; anfractibus uni-seriatim tuberculatis, transversim granoso-striatis, tuberculis co-nicis subdistantibus ; varicibus magnis cavernosis ; anfractu ultimo multiseriatim obsolete tuberculato, fasciis duabus angustis pur-
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