193 



Notes on South Australian Marine Mollusca, 

 WITH Descriptions of New Species. -Part VIM. 



By Jos. C. Verco, M.D., F.R.C.S. 

 [Read June 2, 1908.] 

 Plates XI. to XIII. 



Emargfinula subtilitexta, n. sp. PI. xi., figs. 6, 7, 8. 



Shell ovate, rather thin, white. Apex well curved, one- 

 sixth of the length from the posterior end. Convex anter- 

 iorly from apex to margin ; posteriorly concave below the apex, 

 then convex, then somewhat spreading near the margin. Slit 

 narrow, margined by a low thin erect lamella. Posterior 

 two-thirds closed; closing callus sunken, scalloped with trans- 

 verse erect lamellae convex towards the apex. Sculpture : 60 

 radial ribs, low and flatly rounded, about one-half as wide as 

 the interspaces, projecting beyond and crenulating the mar- 

 gin. Concentric narrow erect lamellae rather crowded can- 

 cellate the surface. Interior smooth and white. 



Z^/m.— Length, 6'5 mm.; breadth, 4*9; fissure, 1"4 mm.; 

 height, 2 mm. 



Locality. — 110 fathoms, off Beachport, 1 dead. 



Diagnosis. — E. superha, Hedley, has the same number of 

 radial ribs and the dentate margin, but has higher concentric 

 lamellae. E. dilecta, A. Adams, has a similar sunken scal- 

 loped slit fasciole, and nearly the same number of radials, 

 rather more ; but has ruder ribs wider than their interspaces. 



Puncturella (Cranopsis) corolla, n. sp. PI. xi., figs. 1 to 5. 

 Shell thin, roundly oval, depressed conic. Apex eccen- 

 tric, one-fifth of the length from the posterior end, spiral, 

 well curved backwards. Protoconch projects on the right 

 side and consists of two whorls, the first turn and a half are 

 smooth, convex, glistening; the second half turn, which in- 

 creases rapidly, is minutely crowdedly granular; at the junc- 

 tion of the two is a minute scar, the first part fitting into the 

 second. In the adult shell the latter part of the protoconch 

 looks directly backward. The sculpture of the shell begins 

 gradually as accremental wrinkles, and next as radial riblets. 

 Where the wrinkles commence the slit begins. The dorsum 

 in front is a uniform convex curve, behind it is a continuous 

 concave curve. The perforation occupies the middle third 

 of the dorsal slope, and is lanceolate. Between it and the 



