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Show 877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 247 68. DORIDOPSIS ? DIARDI. Doris diardi, Kel. I. c. iv, p. 267 (1859). Hab. Ceylon. 69. D. ? ELISABETHINA. Doris elizabethina, id. I. c. p. 267. Hab. Ceylon. 70. D. ? MARIEI1. Doris mariei, Crosse, Journ. de Conch. 3° ser. xv. p. 307, pl. 12. Hab. New Caledonia, Noumea. 71. D. ? ROSSITERI. Doris rossiteri, id. I. c. p. 309, pl. 12. f. 2. Hab. New Caledonia, Noumea. 72. D. ? FABREI. Doris fabrei, id. /. c. p. 310, pl. 12. f. 3. Hab. New Caledonia, Noumea. Descriptions of the new Species} DORIS CORIACEA, sp. nov. (Plate XXVII. figs. 1-4.) Body much depressed, elliptic. Mantle very large, leathery, the border widely extended all round and subcrenulate; granular above from the presence of numerous close, minute, rounded, subequal tubercles. Rhinophores clavate, with numerous laminae on the upper half, retractile within deep cavities, the margins of which are raised and denticulate at the edge. Branchiae 6, tripinnate, set round the long, thin, tubular anus in a cavity having a 6-lobed completely contractile margin. Oral tentacles short and flattened. Foot narrow, with a shallow transverse groove in front, the upper lamina being rather enlarged and divided mesially. The colour of the spirit specimens is in general brownish fawn, sometimes darker, and occasionally nearly white. On the upper surface irregular patches of minute black speckles are situated epi-dermically between the granular tubercles. In some specimens these black markings are nearly wanting; in others, they are over the whole 1 Mr. Crosse gives no account of the oral apparatus of this or of the two following species. He considers that the latter m a y belong to Mr. Fease's genus Doriopsis. 2 It is just possible that a few of the descriptions which follow m a y relate to forms already named by other observers. For reasons more than once alluded to, however, it is impossible to be certain of this either way ; all that that can be said is, that none of the hitherto published diagnoses can be definitely referred to any of the following animals. M y descriptions would have been more minute had I been able to cut up the specimens: they belong, however, to the collection of the British Museum ; and I did not feel justified in making any thing like complete dissections. |