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Show 650 SIR C. ELIOT ON NUDIBRANCHS [June 19, One specimen is preserved in Walter Elliot's collection, and two others were found at Newcastle marked as having been sent from Ceylon by Kelaart. The largest specimen is 38*5 mm. long, 18 broad, and 15 high. The external characters of all are much the same. The colour is dull yellow-ochre, with black ring-like spots of irregular outline, the largest about 6 mm. broad. These spots are not as a rule simple ocelli, but areas surrounded by a ring and containing a considerable number (as many as 50) of smaller spots. The black pigment is almost entirely on the papillae, and not on the dorsal skin. Besides these rings there are black spots without a light centre on the margins of the mantle and foot. The number of spots on the under surface is very variable. The whole back is covered with thick-set minute papillae, which can be scraped off. They are soft, but contain straight colourless spicules *. The rhinophore-pockets are large but not raised. The perfoliations of the rhinophores are black, but the base and tip of the column are white. The branchial pocket is a conspicuous transverse slit, 10 mm. long and 2'5 broad. Though it has not raised edges, the region all round it is distinctly elevated. The branchiae are six, large, quadripinnate, yellow with a black rhachis. The anal papilla is subcentral, large, yellow with a black crenulated margin. The oral tentacles are long, digitate, yellow with black tips. The anterior margin of the foot is very deeply grooved. The upper lamina is divided in the middle and forms an ample flap on either side. The buccal parts had been removed from two specimens, but the teeth were found in the third, though the ribbons of the radula had entirely decayed and it was not possible to state their arrangement with certainty. The formula may have been about 25 x 20.0.20. The specimen was small. Some of the teeth are like Bergh's figures of the first lateral of K. annuligera, but their position is no longer plain. The other teeth also agree with Bergh's figures. In two specimens the penis terminates in a transparent colourless stylet about two-thirds of a millimetre long. The end is blunt and not pointed-a shape which is also indicated in Bergh's figures (Semper's Reisen, Heft x. pi. xii. fig. 16). These specimens are undoubtedly identical with Kenlrodoris annuligera, described by Bergh in Semper's Reisen {I. c. and xvii. 1890, p. 921). In his description of the Mollusca collected by KUkenthal at Ternate (Abhand. der Seckenberg. Gesellsch. Band xxiv. Heft i. p. 99) he expresses the opinion that his Kentrodoris annuligera is the Doris funebris of Kelaart and also the D. macidosa of Cuvier and of Quoy & Gaimard. As the examination of Kelaart's specimens shows, the first of these identifications is correct. The others are perhaps less certain. Cuvier (I. c.) described his D. maculosa as " presque aussi plat * They correspond with Bergh's description in Semper's Reisen, xvii. p. 922. |