MOLLUSCA — IIKDLKY. 



:i63 



Fig. S6. 



MYXA EXESA, sp. nc.v. 



(Fig. 8G.) 



Station i;5. 



Shell small, thin, translucent, smooth, 

 conical. Colour white. Whorls slightly 

 rouiulecl, four and a half, besides a few 

 wliorled perpendicular heterostrophe apex. 

 Suture channelled, periphery keeled, base 

 flattened. XTmbilicus broad and deep, 

 infundibuliform, angled at the margin. 

 Aperture elliptical, produced anteriorly 

 in a spout. Length, 1-6 mm.; breadth, 

 0-S mm. 



Several specimens from 41-50 fathoms 

 off Cape Three Points. 



ODONTOSTOMIA, Jeffreys. 



As the name Odostomia and Odontostomia are generally mis- 

 understood, it may be well to here recall that Dall has pointed 

 out* that Odostomia was proposed by Fleming! for certain land 

 shells, and that strictly speaking it is a synonym of Pupa. 

 Odontostomia was introduced by JefFreysj in connection with a 

 single species, the Turbo plicatios of Montagu. 



ODONTOSTOMIA NUGATORIA, sp. nor. 



(Fig. 87.) 



Stations 13, 49. 



Shell small, oblong. Colour white. Whorls 

 four, plus a tilted heterostrophe apex. Spire 

 subgradate. Sculpture : each adult whorl 

 bears numerous stout projecting perpendicular 

 ribs crossed by fine spiral grooves. Aperture 

 subquadrate, plication more apparent in 

 immature shells ; columella reflected, lip ante- 

 riorly effuse. Base more or less perforate. 

 Length, 2*2 mm. ; breadth, 1-0 mm. 



A few specimens from 41-50 fathoms off" 

 Cape Three Points, and from 63-75 fathoms 

 off Port Kembla. 



* Dall-Trans. Wagner Inst., iii., 1S92, p. 24S. 



+ Fleming — Edinburgh Encyelopa3dia, vii., 1813. 



+ Jeffreys Malacological and Conchological Magazine, Part ii., 1839, p. 34. 



