CLASS. GASTEROPODA. 



Order. Nudibranchia. 



Fam. Doridea. 



yil. Doris, Lin. 

 1. Flemingii. 



Doris nigricans, Fleming. 

 Animal oval, with seven or eight branchial plumes, 

 and two annulated tentacula : the mantle covered 

 with filiform papillae. 



a. purple-brown, mottled: branchiae white, 

 mottled with purple above, white beneath : foot 

 whitish. 



/5. entirely white, branchial plumes more 



obtuse. 



Under stones at spring tides, Ballaugh,notcommon. 



I have changed the specific appellation of this 



animal as the name given to it by the discoverer had 



been previously applied to another species by Otto. — 



{Nov. Act. Acad, Nat. Cur. xi. p. 275.) 



Fam. Tritoniacea. 



YIII. Tritonia, Cuv. 

 1. Hombergi, Cuv. 



a. dorso purpureo. 

 jS. dorso fiavo. 

 Frequent in deep water on the north coast : the 

 yellow variety is generally larger than the purple, 



