128 



Lirae 14, rather unequal, closer together than the costao ;. 

 nodular-granulose on the larger lirae. 



2. E. nodulatus. 



Liras six ; costae wide apart ; granulose ; apex hemi- 

 spheric. 3. E. Tasmanicus. 



Costae simple, interstices spirally striated. 



4. E. citharellus; 

 Surface cancellated, but not granulated. 



5. E. leptoslceles. 

 Whorls shouldered, especially the earlier ones. 



Intercostal spaces rugosely striated ; apex large, hemi- 

 spheric. 6. E. iexturatus. 



Intercostal spaces microscopically striated ; apex sub- 

 cylindrical. 7. E. turritus. 



1. Epidromus tenuicostatus, T. -Woods. Plate vi., fig. 12. 



I'isania tenuicostata, Tenisou- Woods, Proc. Lin. Soc, N.S.W.,. 

 Tol. iii., p. 224, t. 20, f . 6, 1878. 



Shell elongate-fusiform ; whorls eight, convex ; nuclear 

 whorls two, smooth, shining, ending in a very small suberect 

 papillary tip ; the third or fourth whorls shining, ornamented 

 with slightly ilexuous crowded transverse ribs ; the rest of the 

 whorls cancellated by equal and equidistant transverse and 

 spiral ribs, stoutly granulose at the intersections. About 40 

 transverse ribs on the last whorl, and about 12 spiral ribs on 

 the penultimate whorl. 



Varices eight, somewhat irregularly disposed, broad, crenu- 

 lated on the margin. 



Aperture narrowly oblong ; canal very short, slightly twisted 

 and reverted ; outer lip dentate lirate within ; inner lip re- 

 flected on the columella, smooth. 



Length, 15 ; breadth, 5 ; length of aperture and canal, 6"5. 



Localities. — Lower beds at Muddy Creek ; gastropod-bed of 

 the Eiver Murray Cliffs, near Morgan. 



The examples from the latter locality offer such differences 

 from the type as to suggest a distinct species ; in them the 

 third whorl from the summit is prominently ventricose, produc- 

 ing a turbinate apex, and the transverse ribs on it are stout and 

 wide apart. 



2. Epidromus nodulatus, spec.'jnov. Plate vi., £9;. 11. 

 Shell turriculate ; whorls seven and a half, moderately con- 

 vex ; nuclear whorls one and a half, globose, smooth, with the 

 tip immersed. Ornamented with somewhat unequal revolving 

 lir^e (14 on the penultimate whorl) and narrow, rounded, 

 curved, transverse riblets (about 22 on the penultimate whorl); 

 the riblets are narrower than the interspaces, which are trans- 

 versely striated, and are slightly nodulate at the intersections 



