227 



TOECULA MUEBATANA 



Spire acute, apical angle about 15°, of upwards of 12 

 flattish whorls, medially depressed and acutely elevated at 

 about the anterior fourth ; suture distinct, thread-like, or 

 somewhat grooved. Surface ornamented by about 24 spiral 

 threads with or without smaller intermediary ones, crossed by 

 close-set sigmoid striae, the latter on the anterior whorls 

 thinly squamose. Last whorl bluntly truncated on the 

 periphery ; base with spiral threads and transverse striae as on 

 the upper part of the whorl. Aperture quadrately-oval, con- 

 tinuous ; outer lip with a deepish subtriangular median sinus. 



Total length, 60 ; breadth of last whorl, 17 ; height of last 

 whorl, 12 millimetres. 



The species varies in the shape of its whorls, from flat or 

 slightly concave to somewhat quadrate, and corresponding 

 thereto in the depth of the suture ; the keel-like elevation is 

 sometimes obsolete, but the median depression is always 

 present. 



Localities. — Table Cape. E. M. Johnston {six exs.). Very 

 abundant in the middle and lower beds of the River Murray 

 Cliffs from Overland Corner to Blanchetown ; also at Muddy 

 Creek, Corio Bay, and Schnapper Point (E.T.). 



The Table Cape specimens have flattish or slightly concave 

 whorls with or without the anterior keel, and fall within the 

 limits of variation exhibited by the Murray examples, though 

 they are usually broader in proportion the apical angle being 

 as much as 18°. 



TUEEITELLA TEISTIEA. 



Shell acuminately turreted ; apical angle about 15° of 

 upwards of 12 slightly convex whorls ; suture linear. Surface 

 ornamented with three conspicuous, spiral, acute ribs, and 

 spiral and transverse striae ; the sulci on each side of the 

 central rib are of equal breadth, but the anterior rib is 

 separated from the suture by a distance less than that which 

 separates one rib from the next, whilst the posterior rib is 

 separated from its corresponding suture by a distance greater 

 than the breadth of the medial sulci. Last whorl truncately 

 angular at the peripheiy ; base spirally ribbed and striated. 

 Aperture quadrate ; outer lip imperfect. 



Length, 45; hreadth, 12 millimetres. 



Locality. — Table Cape. E. M. Johnston {one example) . 



This species is distinct from the few living species, which are 

 conspicuously three-ribbed, by shape, ornament, and the 

 unsymmetrical position of the revolving keels, 



Leiosteaca Johnstoniana. 

 Syn. — Eulimella aubulata, Tenison- Woods {non Mont,) . 



