JAPANESE NUDIBEANCHS. 7 



against this white. No armature was found in the genitalia. 



This animal is possibly a colour variety of the Doris pecten 

 of Collingwood which is blue. As the figure makes it certain that 

 yellow is the natural colour of the present specimens, it seems 

 better to register them provisionally under another name. But if 

 the identity is established the specific designation pecten has 

 priority and they should then bo called Ct. pecten var. aurantiaca. 



Ct. flabellifera Cheeseman seems to be a separate species 

 having less conspicuous tubercles and smaller but more numerous 

 (22) branchiae. 



Mchinodoris annata sp. nov. 



Cf. Quoy and Gaimard, Voyage de l'Astrolabe, Moll. ii. 1834, p. 263 ; and Bergh, Journal 

 Musée Godeffroy, Heft 6, 1874, pp. 109-112, both referring to K 



One specimen. It is entirely white. Length 16 mm. maxi- 

 mum breadth 7 mm. : longest papillae 2-5 mm. high. The back is 

 covered with these papilla?, which are not constricted at the base 

 but are roughly conical, though the outline is a little irregular. 

 There are small papillae round the mantle margin. The integu- 

 ments are full of spicules which do not however project. No 

 oral tentacles are visible and the under side of the mantle mar- 

 gin is as described by Bergh. The branchiae as preserved stand 

 in a thin, erect bundle ; they are five in number, two small and 

 three fairly large. They are tall, scanty, pinnate or bipinnate 

 in different places. 



On opening the buccal mass there is visible a labial arma- 

 ture consisting of a complete greyish ring composed of short rods 

 bent at the tips. The raclula is colourless, very fragile and easily 

 thrown into confusion. The formula is at least 75x70.0.70. 

 There is no central tooth but a rhachidian fold. In essentials 

 the teeth resemble those of E. eolida as drawn by Bergh. Those 

 nearest to the rhachis bear four denticles spread out like a claw 

 and are lower than the others. Those in the nfiddle of the half 

 rows are taller and bear from 4 to 6 denticles, but more than six 

 were not seen. The outermost are longer still, thin and denticu- 

 late at the tips. 



