ELIOT : BRITISH NUDIBRANCHS. 243 



protected by tubercles, and the foot is broad. In fact, they differ from 

 the typical Staurodoris only in having bipinnate branchiae, and Gar- 

 stang describes these organs as being simply pinnate in the smaller 

 individuals. The ridges connecting the dorsal tubercles are found in 

 St, pseudovernicosa, von Iher., St. d'' Orbignyi (Gray), and sporadically 

 in St. verrucosa. 



It is possible that the Boris euhalia of Fischer (I.e.), from Arcachon, 

 is the young of this species. It has the same striking coloration and 

 simply pinnate branchiae, like the small specimens, but no ridges 

 connecting the tubercles are mentioned. They may perhaps be 

 developed later. Bergh refers D. euhalia to Lamellidoris, no doubt 

 because Fischer says it has no oral tentacles, but vride rounded buccal 

 lobes. But, though Fischer's description is inadequate, he expressly 

 says that the branchiae are retractile. 



It is also possible that St. maculata may be von Ihering's St. pseudo- 

 verrucosa, from Naples, which has conical dorsal tubercles connected 

 by ridges, five bipinnate branchiae, but no tubercles on the branchial 

 pocket. The absence of the latter in von Ihering's specimen might 

 be explained as an individual anomaly, but his remark "Das Thier 

 gleicht ausserlich der St. verrucosa^'' is unfavourable to the identi- 

 fication, as the specimens sent me from Plymouth are not at all like 

 those of St. verrucosa from Naples. 



