12 PROCEEDINGS OF THE ACADEMY OF [1879. 



6. Fiona marina Forsk., var. Pa- 17. Acanthodoris pilosa (O. F. Miil- 



cifica, Bergh. ler), var. purpurea, Bergh. 



7. Dendronotus purpureus, Bergh, 18. Acanthodoris coerulescens, 



n. sp. Bergh, n. sp. 



8. Dendronotus Dalli, Bergh, n. sp. 19. Lamellidoris bilamellata (L.), 



9. T'ritonia tetraquetra (Pallas). var. pacifica, Bergh. 



10. Archidoris Mo titer eyensis 20. Lamellidoris varians, Bergh, n. 



(Cooper). sp. 



11. Diaulula Sandiegensis (Cooper). 21. Lamellidoris hystricina, Bergh, 



12. CadAinarepandu (Aid. &Hanc). n. sp. 



13. Cadlina pacifica, Bergh, n. sp. 22. Adalaria pacifica, Bergh, n. sp. 



14. Chromodoris Dalli, Bergh, n. 23. Adalaria virescens, Bergh, n. sp. 



sp. 24. Adalaria <ilbopapillosa (Dall). 



15. Chromodoris calif omiensis, 25. Akiodorislutescens, Bergh, n. sp. 



Bergh, n. sp. 26. Triopa modesta, Bergh, n. sp. 



16. Acanthodoris pilosa (0. F. Mill- 27. Polycera pallida, Bergh, u. sp. 



ler), var. albescens, Bergh. 



An examination of the foregoing list 1 first shows a quite northern 

 character of the forms examined, excepting the two species of 

 Doridee (Chromodoris) which actuallj r come from and are usually 

 characteristic of a more southern region than the others. Se- 

 condly, the species examined agree vyith North Atlantic forms, 

 being either identical or mere varieties of them, or at least nearly 

 allied species. 2 



AEOLIDIID^J. 



The Aeolidiidse' have representatives in all the seas of the world, 

 but seem, as far as can be judged from the rather meagre accounts 



1 Besides Nudibranchs, there were included in the material sent also a 

 Marsenia, an Onchidiopsis, a O aster opter on, three or four species of Bul- 

 lidce, and a Pleurobranchus, which will be published later. 



2 According to R. E. C. Stearns a striking feature in the conchological 

 fauna of that part of the Pacific coast included in the Californian and Ore- 

 gonian zoological provinces, when compared with the molluscan fauna of 

 the Atlantic coast from the Arctic seas to Georgia, is the preponderance in 

 the former of those forms of molluscan life -which are embodied in the 

 Scutibranchiata; cf. Proc. Cal. Acad. Sci., Oct. 1872, and Ann. Mag. Nat. 

 Hist., 4th ser., xii. pp. 185-186, 1873. 



3 The generic name (Aeolus Virgil) was established by Cuvier (in the 

 Tabl. Elem. p. 388, 1798), and originally written " Aeolide (Aeolidia) ;" 

 on the fifth plate of the illustrations of the Lee, d'anat. comp., vol. i., it is 

 written Folia; later, in the Regne Animal e, he changed the denomination 

 to Eolidia, since then the name has been written Eolis, Sofa's (Lam'k, Loven, 



