328 



PKOCEEDINGS OF THE MALACOLOGICAL SOCIETr. 



representing a separate province, but be taken in conjunction with the 

 nudibranchs of South Australia and Tasmania. This fauna seems to 

 show much the same characters as the New Zealand fauna. 



In classification I follow the arrangement of Bergh, but this system 

 was based chiefly on an examination of forms from the Northern 

 Atlantic and Pacific, the Mediterranean, and Indo-Pacific, hardly any 

 specimens from the Southern Atlantic or Southern Pacific being 

 available. But recent investigations (particularly Bergh's account of 

 the Opisthobranchiata of South Africa in the Transactions of the South 

 African Philosophical Society, vol. xvii, 1907) show that these 

 southern forms necessitate both additions and rearrangement. As 

 explained elsewhere,' I think wider generic definitions advisable and 

 in particular I should wish both for convenience and correctness of 

 nomenclature to revive the old name Doru and to recognize Staurodoris, 

 Archidoris, Anisodoris, and Homoiodoris as subgenera of it. To these 

 subgenera I add in this paper a new one, Ctenodoris, proposed for Doris 

 ilabellifera, Cheeseman, and Staurodoris pecten, Eliot, both characterized 

 by a peculiar arrangement of the branchiae. 



The following is a list of New Zealand nudibranchs. It makes no 

 pretension to bibliographical completeness and merely endeavours 

 to give the names of such forms as are known with sufficient 

 certainty to warrant conclusions being drawn as to their distribution. 

 The forms marked with * are described below : — 



Distribution. 



An allied form, St. bellulus ( = St. 

 7jf«rjfe), is foundintheN'. Atlantic. 



Genus recorded from N. Atlantic, 

 Mediterranean, Ceylon, Amboina, 

 E. Africa. 



Genus recorded from Atlantic, 

 Mediterranean, E. Africa, and 

 California. 



Genus recorded with certainty only 

 from N. Atlantic. Janus san- 

 guineus of Angas is uncertain. 

 The allied Janolus is recorded 

 from California and the Arafura 



Name. 



1. *StiUgcr J'elinus, Hutton . 



2. Hervia (?) Corfei, Hutton. 



3. *Facelina sp. 



4. *Antiupella { = Janus) Novozcalundica, n.sp. 



/). *Alloiodoris huiuginata (Abr.) 



6. *Archidoris WcUitigtoneusis (Abr.) 



7. Archidoris violaeea, Bergh 



8. Arelddoris nanula, Bergh . . 



9. * Ctenodoris flab ellif era (Cheesem.) 



10. Homoiodoris {^) Novozealatidice, Bergh 



11. Atagema carinata {Q. & G.) 



12. * Jtostf/ng a muscul a (Ahr.) ... 



13. Eosta/iga rubicunda (Cheef^em.) ... 



Allied and possibly identical species 

 from Tasmania and S. Australia. 



Species not recorded from elsewhere. 

 Genus probably cosmopolitan, but 

 most abundant in temperate seas. 



Perhaps identical with E. African 

 forms. 



Genus recorded from the Maldive 

 Islands. 



Genus recorded from Japan. 



Xot recorded from elsewhere. 



Genus recorded from N. Atlantic, 

 Mediterranean, and California. 



' Notes on some British Nudibranchs 

 for June, 1906, p. 336. 



in Journal of Marine Biological Association 



