18 ART. 1. — CHARLES ELIOT: 



blank areas which bear no lines and are distributed quite ir- 

 regularly here and there on the back. 



Internally there is no trace of a labial armature and the 

 formula of the radula is about 50x110.0.110 In the genitalia 

 the vas deferens is armed with large hooked spines set on disks, 

 bt^ in the vagina, though the cuticle is very strong and thrown 

 up into many folds, neither spines nor disks occur. I am 

 somewhat doubtful as to the specific distinctness of this and the 

 next species. See my remarks at the end of the description of 

 the latter. 



Platydoris striata Kelaart. 



Alder and Hancock on Indian Nudibranchiate Mollusca, 1864, p. 117-118. Eliot, P.Z.S. 1960 

 p. 647 and p. 1003. 



One specimen from Kataura, Kagoshima Province. The 

 integuments are tinged with faint pink and are marked with bold 

 black lines which do not coalesce so as to form blotches. Here 

 and there however are clear spaces without any lines. 



The specimen is bent and the margin is much undulated 

 but the dorsal surface is about 95 mm. long and 65 mm. broad. 

 The foot is short, being only about 35 mm in length, but its 

 ample thin margins, which are now turned inwards, must have 

 been of a considerable breadth when the animal was adhering to 

 a flat surface. The mantle margin is also very ample, in some 

 places as much as 25 mm. 



The lines on the back are rarely straight, but usually those 

 in a particular region lie on the whole in the same direction. 

 They are densisfc in the lateral parts of the dorsal surface and 

 over the head. There are some clear spaces in the medio-dorsal 

 area and here and there on the mantle margin, but as a rule the 

 lines run to the edge. On the under surface of the mantle mar- 

 gin and the sides of the foot there are also black lines, straight- 

 er and not so numerous as those on the back. There are also 

 black lines on the branchiœ and on the oral tentacles and there 

 is black pigment in the grooves of the latter. 



The rhinophores as preserved are violet grey. The openings 



