RY R. TATE AND W. L. MAY 461 



Description based on an authentic specimen in the collection 

 of Mr. W. F. Petterd. 



MvocHAMA Tasmanica, Ten.-Woods {Oouldia). 



Gonldla Tasmanica, as illustrated by the accompanying figures 

 of the type (Text fig. 13), is clearly a Myochama, as already indicated 

 by Mr. Petterd ; its 

 inner aspect shows the 

 triangular ligamental 

 pit and the absence of 

 teet I ; it represents 

 the free stage of the 

 species, which is char- 

 acterised by its widely Fig. IS.— Myochama Tasmanica. 

 separated rounded concentric ridges. Length 2-5, width 3 mm. 



3f. Woodsii, Petterd, is founded on the same species after 

 becoming attached and ext(:;nding irregularly. Length and width, 

 1 mm. 



Meretrix planatrlla, Lamarck. 



Philippi in 1845 was the first to figure this Lamarckian shell and 

 to give it a locality, "Insula Van Diemenensis''; the figure 

 represents a young shell of about 20 mm. in the anterior-posterior 

 diameter. Tenison- Woods misread Philippi'.^ locality as " Terra 

 Van Diemenensis," and so included the species as Tasmanian. 

 E. A. Smith in the Challenger Report (p. 136), makes \f. Diemenen- 

 sis a synonym with M.planatella. Venus nitida, Quoy ctGaimard, 

 if the type locality (Hobart) is correct, is probably synonymic; 

 otherwise it is not known here. The species attains to a length 

 of 65 mm. 



Venerupis brevis, Quoy & Gaimard. 



The type-example of this species is reputed to have come from 

 Hobart. Hutton (Man. N. Zealand Shells, 1880, p. 152) says of 

 V. brevis that it is probably the same as V. paupercula^ which 

 Carpenter records from Mazatlan. 



V. brevis from its figure recalls V. obesa, the margin of which 

 is not crenulated. Indeed, it would appear as if a mistake had 



