. Mollusca ... ootis very short behind and cut ofi: square. In the odontophore the middle tooth of the radula is stronglytricuspid, the inner laterals as usual, the outer as in gigas,bicuspid, the inner point much longer than the other. Theextreme outside laterals are very small. This species has been regarded as allied to (or identical with)Ibycus fissidens, Heynemann, but the teeth of the radula appearto be very different. [The teeth of I. fissidens are very similar tothose of the genus Lepiodontarion of Sarasin.] Genus GIRASIA. Girasia, Gray, Cat. Pulm. Brit. Mus. p. 61 (1865) ; Godwin-Aust
. Mollusca ... ootis very short behind and cut ofi: square. In the odontophore the middle tooth of the radula is stronglytricuspid, the inner laterals as usual, the outer as in gigas,bicuspid, the inner point much longer than the other. Theextreme outside laterals are very small. This species has been regarded as allied to (or identical with)Ibycus fissidens, Heynemann, but the teeth of the radula appearto be very different. [The teeth of I. fissidens are very similar tothose of the genus Lepiodontarion of Sarasin.] Genus GIRASIA. Girasia, Gray, Cat. Pulm. Brit. Mus. p. 61 (1865) ; Godwin-Austen, Mol. Ind. i, 1888, p. , Theobald, J. A. S. B. xxxiii, p. 244 (1864). Type, G. JiooJceri, Gray. Range. Himalayas and Assam. Shell ovate, jisually membranaceous, with a more or lessthickened apex, sometimes rudimentary, usually with an oliva-ceous epidermis ; apex white. Animal slug-like, long, mantle largely developed ; shell anddorsal lobes are united all round, and the shell is entirely covered. [Kg. 70.— Girasia hoolceri, Gray. A. View of right, left, and dorsal sides: drawn from a spirit-specimen^ f nat. Position of shell- and dorsal lobes. Nat. size. The former grown togetheron the line running from the ; left dorsal lobe turned back toshow the position of the respiratory and anal orifices. B. Generatiye organs, f nat. size. E. Spermatophore. X 3. B. Do., part of. X 3. D. Jaw, enlarged, andradula. x 138. C. The shell. | nat. size. E. Girasia, crocea, Godwin-Austen. Albumen-gland. Anal orifice. Amatorial organ. crp. Csecum of the retractor penis. f. Foot. k. Kale-sac. Generative Left dorsal lobe. hi. Left Ketractor muscle of Retractor Right Right dorsal Prostate.] 200 ZONITID^B. by the former, with the exception of a narrow area on the posteriorleft margin. Jjrom the anterior right margin of this area a well-marke
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