1906,] OF SOUTHERN INDIA AND CEYLON. 651 



que le scahra et encore plus rude," which suggests a flat rovigh 

 Platydoris. But the identification may be allowed to stand, 

 for it cannot be disproved, and it would be a pity to change the 

 nomenclature established by Bergh. 



Neither do I feel sure that Quoy and Gaimard's animal from 

 Vanikoro is really identical with either Cuvier's species or 

 K. annuligera. They say it is " a dos tres bombe, de consistance 

 assez moUe," which does not agree with Cuvier's accovint given 

 above. The figure of the under side [I. c. pi. xvi. fig. 4) does not 

 indicate that the anterior mai-gin of the foot is developed into 

 lappets ; the tentacles are expressly said to be yellow at the tips 

 and the mantle has a white border. These are no doubt small 

 points, but they may indicate real differences. 



At least one other Dorid, Platydoris townsendi (Eliot, " Nudibr. 

 from the Indo-Pacific," Journal of Conch., Oct, 1905, p. 253), has 

 the same coloration and superficial appearance as the species 

 here described ; and there may be others, for instance Diauhda 

 sandiegensis, which is velvety, yellowish, with dark brown or 

 black rings. 



From the various descriptions and plates, it would appear that 

 the colour of the living IC. maculosa varies from pale yellow-green 

 or grey to white. Kelaart represents hardly any spots on the 

 underside. Alder and Hancock's figure [1. c. pi. xxx. figs. 9, 10) is 

 much more elongated than those of other authors. It no doubt 

 represents the animal as fully extended and moving. 



DiSCODORIS. 



Three forms described by Alder and Hancock seem referable to 

 this genus, and the types of all three are preserved at Newcastle, 

 but in indifferent condition. The specimen of D. pardalis corre- 

 sponds with Alder and Hancock's description of the external 

 characters, but the buccal parts have been removed. The texture 

 is soft. 



DiSCODORIS CONCINNA (A. & H.). 



(Cf. Disc, concinnifortnis Bergh, Mai. Tint, in Semper's 



Reisen, xvi. 1, pp. 807-811, and xvii. pp. 900-902. Id., 



Siboga, pp. 100-102.) 



Four specimens labelled in Hancock's writing "Nos. 14, 23, 



82, 115. Doris concinna. Madras. Mr. W. Elliot." There is 



also a note to the effect that the specimens were found partly 



dried up in 1902. They are now in spirit ; but their hard and 



stiff texture is probably the result of their desiccation. 



So far as one can judge from such old material, Alder and 

 Hancock's description and plate are quite accurate. The colour of 

 the under side and the foot appears to be variable, being in some 

 specimens pale and spotted, in others darker and livid {cf. the 

 varieties of i>. concinniformis Bergh). The shape and elevation 



