NOTES ON A COLLECTION OF CALIFORNIAN NUDIBRANCHS. 4I 



The foot is rather broad, rounded at both ends and not projecting behind. 

 The proboscis is protruded and projects from a pore in its anterior margin. 

 No pedal groove or oral tcnticles are visible. The mantle margin is every- 

 where rather narrow. 



'I'he internal organs, which are yellowish-white, seem to be as usual in 

 the genus and do not differ from those of D. vidua as described by Bergh. 

 No blood gland was discovered. The buccal tube is rather thick and makes 

 an S-shaped bend to the left. The mouth gland is yellowish, folliculate with 

 a fairly long duct. The central nervous system as usual in Doridopsis, and 

 with distinct eyes. 



The specimen as preserved is remarkably like Garrett's figure (repro- 

 duced by Bergh) of D. vidua, except that the skin has a more distinctly 

 yellowish tinge and the mantle margin is narrower. Possibly too, the spicules 

 are more numerous and differently shaped. D vidua is recorded from Tahiti, 

 and the locality renders the identification suspicious, as the Californian nudi- 

 branchs are not as a rule the same species as those from the South Seas ; 

 but the resemblances are so great that I have registered the animal as D. vidua. 

 If it ultimately proves to be a separate species, it would seem entitled to 

 Cockerell's manuscript name D. nigromaculata. 



Doridopsis foedafa, Abraham, of unknown habitat, would appear to be 

 a very similar form, but is said to be soft, fleshy, and minutely tuberculate. 



Doridopsis reticulata, n. sp. 



PL vii, fig. 5. 



Eight specimens of very various sizes and colours, but apparently belonging 

 to the same species. The living animal is said to have been rather more 

 than 20 millim. long. Many of the preserved specimens are very small, but 

 the largest are 1 7 millim. x 7 millim., and 14 millim. x 9.5 millim. respectively. 

 They are all very flat and irregular in outline, and can probably alter their 

 shape from long to oval. They were captured at San Pedro, California, 

 and one at anyrate on Dead Man's Island. This specimen, when alive, was 

 of a deep chestnut colour, with very numerous white spots. The branchiae 

 were entirely white, the short thick rhinophores pale orange ; the margin of 

 the body was whitish, and the sole of the foot yellowish white. 



The ])reserved s[)ecimens vary in colour from yellowish-brown to pur- 

 plish-brown ; in all, the back is covered with small tubercles, which are tipped 

 with white. These white tips and the light mantle border are more conspic- 

 uous in tlie yellowish than in the purplish specimens. The rhinophores are 

 whitish, stout, with about 30 perfoliations and slightly raised sheaths. The 

 branchiae are 5 or 6, conspicuously white and tripinnate. The edge of the 

 pocket is raised, and in most speciuiens turned outwards. In all, the under- 

 side of the mantle is grey, and dis[)lays a remarkable clear white reticulation 

 which looks superficially like the branchiae of PhyUidia. It appears, however, 



