34 



NOTES ON A COLLECTION OF CALIFORNL\N NUDIBRANCHS. 



Archidoris montereyensis, juv. (Cooper). 



Three small specimens from La Jolla may be immature individuals of 

 this species ; they are all less than a centimetre long, yellowish in colour, 

 and indistinctly tuberculate. The tentacles are flattish and grooved, the 

 branchiae seven and tripinnate ; the radula is about 30 x 45. o. 45 ; the teeth 

 are colourless, hamate, crowded near the rhachis and bear a lateral wing- 

 like expansion. There is no labial or genital armature. 



The genus Archidoris is recorded chiefly from temperate seas, but is 

 perhaps cosmopolitan in its distribution, as two species are found in equat- 

 orial East Africa. The common British A. tuherculafa appears to be also 

 found on the Californian coast. Bergh, in his System recognizes five species, 

 or six if .4. marmorata is considered distinct, and the following have since 

 been added : — 



7. A. stellifera, J her. 



8. A. rubescens, Bergh, 

 g. A. incerta, Bergh. 



10. A. nyrtea, Bergh. 



11. A. africana, Eliot. 



12. A. violacea, Bergh. 



13. A. minor, Eliot. 



14. A. nanula, Bergh. 



15. A. wellinf/toneMsis, (Abraham). 



Bergh has created separate genera for Anisodoris and Homoio- 

 doris, both of which resemble Archidoris externally, but are distinguished 

 from it by the presence of a prostate, and from one another by the vagina 

 having an armature in Homoiodoris which is absent in Anisodo?'is. If these 

 genera are retained, I cannot see why Montereina, Mac F. (Mac Farland, I.e. 

 p. 38) is separated from Anisodoris. It appears to have the same essential 

 characters both internal and external, and to differ in being larger, more 

 arched, and in bearing larger tubercles, all of which seem differences of degree 

 hardly amounting to generic characters. 



Cadlina, Bergh. 

 This genus, which is distinguished from most cryptobranchiate Dorids by 

 the presence of a median tooth, is recorded only from the cold and temperate 

 seas of the northern hemisphere. The known species are : — 



1. G. repanda ( A. & H.). N. Atlantic. 



2. C. (jiahra (Friele & Hansen) N. Atlantic. 



3. C. clarae, Jher. Med. 



4. C. pacifira, Bergh. West Coast of N. America. 



5 G. flavoniaculata, Mac F. West Coast of N. America. 

 6. G. niarijivata, Mac F. West Coast of N. America. 

 The genus will, perhaps, prove charactsristic of the Coasts of North West 

 America, since three species are already recorded. The animal described 



