98 ADDITIONS TO THE TASMANIA!) MARINE HOLLU8CA, 



Height 2.5. Greatest diameter 2.5. Least 2 mill. 



Type, with a number of others, from 40 fathoms, off 

 Thouin Hay. Varies much in size, frequently much smaller 

 than the measurements given. 



PL VII, fig. 33. 



EUCHELLUS PROFUNDIOR, Sp. Nov. 



Shell rather slender and elevated, colour whitish to yel- 

 lowish, with irregularly scattered dark brown spots on the 

 keels. (Some co-types have few or no spots.) Whorls 

 four, rounded; spire bicarinate, with two smaller keels 

 on the shoulder. The body whorl has eight keels, the 

 two at the periphery the strongest, the last, which is 

 nodulous, enclosing the umbilical area. The keels and 

 interstices are crossed by numerous fine axial riblets, about 

 25 to 30 on a half turn of the body whorl. These riblets 

 corrugate the keels, but do not form nodules. Outer lip 

 rather thin, expanded. Columella smooth — not toothed 

 — reflexed, so as to hide the small umbilicus from a front 

 view. 



Height 4.5. Breadth 4 mill. 



Type, with 20 others, from 100 fathoms, seven miles 

 cast of Cape Pillar. Appears to belong to about the 

 hundred fathom line, as it has not been taken in shallower 

 dredgings. It was incorrectly identified as scabrituculw, 

 Ad. and Angas, in the Cape Pillar mollusca, but is dis- 

 tinguished from that species by its more slender form and 

 light texture, and the far finer sculpture, the radials in 

 particular being nearly twice as numerous, and in the 

 smooth columella. 



PI. VII, fig. 39. 



MYODORA ELONGATA, Sp. Nov. 



Shell small, elongate, flattened, equivalve, white, 

 rounded in front, squarely truncated behind, umbo about 

 two-fifths from the posterior end. A low ridge extends 

 from the umbo to the posterio-ventraJ margin, over which 

 the sculpture is bent. The ornament consists of about 

 eighteen concentric ridges, separated by spaces usually 

 wider than the ridges. The two tooth-like ridges are very 

 similar in each valve. 



Length 6. Depth 3.5. Conjoined valves would be about 

 2 mill. 



Type, with five others, all single valves, from '10 fathoms, 

 off Thouin Bay. It. has a very distant affinity with M. 



albida, Ten. -Woods. 



PI. VII, fig. 40 and 40a. 



