145 



Aperture narrow-oval, peristome entire and smootli. 

 Length, 11 ; breadth, 3'5 ; length of aperture and canal, 6. 

 Locality. — Lower beds at Muddy Creek. 



2. Sipho crebrigranosus, spec. nov. Plate iii., fig. 8. 



Shell broadly lanceolar-fusiform, rather stout, of six and a 

 half whorls, ending in a large blunt mamillary apex of two 

 globose smooth whorls ; the rest of the whoi'ls moderately con- 

 vex, separated by a linear suture ; ornamented all over with 

 equal and equi-distant encircling lirae and transverse threads, 

 almost obliterated by the development of granules at the 

 intercrossing (the lirae are about 12 on the penultimate whorl). 

 Last whorl tapering into a moderately long, slightly curved^ 

 hardly reverted, open canal ; inner lip lirate within. 



Length, 13 ; breadth, 4 ; length of aperture and canal, 8. 



Locality. — Lower beds at Muddy Creek. 



3. Sipho styliformis, T. Woods. 



Fusus styliformis, Tenison- Woods, Proc. Lin. Soc, JN'.S.'W.,. 

 vol. iv., p. 12, tab. 3, fig, 6, 1879. 



Shell elongately fusiform, slender, thin ; whorls seven. Apex 

 of two smooth whorls, joined to the spire by a thick varix, be- 

 hind which, for about half a whorl, the surface is costated, 

 thence rapidly enlarging into a globose whorl terminating in a 

 narrow subimmersed tip. The spire whorls slightly convex, a 

 little contracted at the anterior suture, rendered almost pris- 

 matic by regular disposed rounded plications (seven to a 

 whorl) ; suture impressed, more or less concealed by vaulted 

 imbricating scales ; ornamented with flat spiral lirsB about or 

 nearly equalling the flat, smooth, intervening furrows (about 

 seven on the penultimate whorl). 



Body whorl rather abruptly contracted into a long, wide, 

 slightly twisted and reverted canal ; aperture ovate ; outer lip 

 thin ; lirate within ; columella arched, smooth. 



Length, 12'5 ; breadth, 4*5 ; length of canal and aperture, 7. 



Localities. — Lower beds at Muddy Creek ; "gastropod bed"' 

 of the Eiver Murray Cliffs, near Morgan. 



4. Sipho asperulus, spec. nov. Plate vi., fig. 5. 



Shell similar to S. styliformis, but larger, with flat whorls 

 channelled at the suture, and the ornament consisting of spiral, . 

 narrow, rounded threads alternately large and small (about 

 ten on the penultimate whorl), crossed by lamellae, which are 

 raised into low scales over the lirse. The plications are not so 

 strongly developed as in the allied species, and are more usually 

 obsolete or reduced to axial angularities. 



