182 VERMETUS. 



four stronger, remote line, aperture transversely oval, bluish 

 within. Australia. 



This is the type and only species of the subgenus Tetr anemia, 

 Morch, which is described as having very long pedal filaments, 

 subulate, and not retractile, with an intermediate mamilla ; the 

 mesopodium small, elongated, with two posterior short filaments. 



F. dentiferus, Quoy, not Lamarck, is a synonym. 



V. INOPERTUS, Riippell. PI. 54, fig. 78. 



Olivaceous, rather thick, twisted. Animal with conical 

 rostrum ; tentacles short, thick, proceeding from a heart-shaped 

 dorsal process ; no pedal filaments, metapodium large, cylin- 

 drical, truncate, penis subulate. Red Sea. 



It is V. operculatus, Gray, and (according to Issel) F. eruca, 

 Lam. 



V. GRANDIS, Gray. PI. 54, fig. 79. 



Clouded, yellowish brown, contorted, laterally affixed, longi- 

 tudinally striate, flattened on the base, convex above, where there 

 are two or three more prominent rugose ridge-like striae, aper- 

 ture round, violaceous. 



Australia. 



This is the type of the subgenus Cladopoda, Gray, and the 

 following species are included therein by Morch. The diagnosis 

 is: Operculum none; foot elongate, front end simple, hinder 

 extremity oblong, clavate or subtruncate. 



It is F. arenarius. Lam., of Quoy and Gaimard. Morch adds 

 a Var. OXYGONA. 



V. ELEGANS, Quoy and Gaimard. PI. 54, fig. 80. 



Animal cinereous, the tentacles, head and foot maculated and 

 spotted with red. Shell and habitat unknown. 



V. ZELANDICUS, Gray. PL 54, fig. 81. 



Animal with yellowish head, brown and red-spotted in front, 

 foot 3'ellowish, spotted with red, mantle widely margined with 

 orange-red. Shell contorted, having no characters of importance. 



New Zealand. 



Possibly identical with the preceding species. It is F. -Novse- 

 Zelandise of Gray. 



