143 



lamellae insinuated at the keel ; at the keel, and in front of it, 

 the lamellae are raised into slender close frills, which about 

 the keel are more or less continuous, and appear as raised 

 threads. Aperture trapezoidal ; outer lip smooth within for a 

 distance of about six mills., beyond which the surface is closely 

 and regularly spirally striated, and provided with narrow and 

 short callous ridges. 



Length, 52 ; breadth, 29 ; length of aperture and canal, 36. 



Locality. — Blue clays at Schnapper Point, Port Phillip. 



3. Siphonalia Roblini, T. Woods. 



Fasits Rohlini, Tenison-AVoods, Proc. Roy. Soc, Tasman., for 

 1876, p. 22, tab. 1, fig. 7. 



Anterior whorls subangulated, with 13 subdistant, somewhat 

 sharp tubercles on the angulation,* ornamented with spiral 

 acute threads, alternately large and small — about 15 large ones 

 on the penultimate whorl — cancellated by thickish subdistant 

 transverse striae. The posterior whorls are transversely plicate, 

 the plicae gradually reduced to tubercles. Aperture elongately 

 pyriform ; outer lip thin, costated within ; canal elongate, 

 twisted, and recurved. 



The type specimen possesses five and a half whorls, the apex 

 being broken off, and has a length of 66, breadth of 30, length 

 of aperture and canal of 41, and breadth of aperture of 14. 



Locality. — Table Cape {Jlohart Mm. I). 



4. Siphonalia longirostris, spec. nov. Pi. xi., fig. 8. 



Shell elongate-fusiform, with a high subscalar spire, ending 

 in a small mamillate apex of one and a half smooth convex 

 whorls. AVhorls nine, convex to subangulated; ornamented 

 with transverse costae, which are reduced to somewhat sharp 

 tubercles, and subacute spiral threads alternately large and 

 small, crossed by subdistant lamellae. There are 11 tubercles 

 on the body whorl and about 11 strong spiral threads on the 

 penultimate whorl. 



Aperture elongately pyriform ; outer lip thin, internally 

 sulcated ; canal elongate and much twisted. 



Length,*69 ; breadth, 27 ; length of aperture and canal, 40 ; 

 breadth of aperture, 11. 



Localities. — Blue clays at Schnapper Point and lower beds at 

 Muddy Creek. 



This species differs from S. Rohlini by its more convex whorls, 

 more elevated and stouter costae, and by the fewer and stouter 

 spiral threads. 



5. Siphonalia spatiosa, spec. nov. Plate iv., fig. 5. 

 Shell somewhat elongately pyriform ; whorls six ; apex want- 

 * The figure represents the tubercles much too large. 



