ELIOT : NUDIBRANCHS AND TECTIBRANCHS FROM INDO-PACIFIC. 



307 



by Pilsbry (" Manual," p. 168) to Z. nevilli on the ground that viridis 

 is preoccupied by Pease's species. The specimens from the British 

 Museum described below are said to belong to this species, and as the 

 specimen from Zanzibar is identical with them, it would appear that 

 the hitherto commonest Indo-Pacihc form should be called nevilii. 

 I think it quite possible that this species is the same as Z. viridis, 

 but, as explained above, do not feel justified in rejecting Pease's state- 

 ment that that animal had four tentacles. Smith {I.e.) seems doubtful 

 whether this Z. vevilli {^L. viridis Nevill) is a separate species, but 

 the specimens which he examined had lost the wings. It appears 

 to be distinguished from the Mediterranean form by a different 

 general coloration, blue lines and blotches on the mantle, which can 

 be seen through the shell, and long narrow wings with indented 

 margins, whereas the wings of the Mediterranean form are oblong, 

 rounded, and with entire margins. Perhaps, also, there is a difference 

 in the structure of the penis. 



Lobiger is recorded from much the same area as Lophocercus : 

 the Mediterranean, West Indies, Zanzibar, Ceylon, South Australia, 

 and Tahiti. 



Lobiger nevilli Pilsbry. 



Pilsbry, " Manual," vol. 16, p. 168; E. A. Smith, I.e., p. 311. 



C.C <ujl. 



Oidn<>.<-. 



Text Fk;. 3. — Lohiger crawling. 



One specimen from Chuaka, Zanzibar, dredged in two or three 

 fathoms. The notes on the living animal are as follows : — "General 

 colour bright green. Four large wing-like appendages. Shell large, 

 not enclosed in mantle, and marked by thin dark green lines, expand- 

 ing here and there into blue blotches. Foot long and narrow. Parts 

 inside the wings light green ; the wings have an indented margin, and 

 a not very definite white border. Inside this is a light yellow band, 

 and at the base of each indentation is an orange blotch. There aie 



