138 



whorls are roundly angled a little in front of the medial line, 

 with a row of large, rounded, nodular plications on the anterior 

 slope, ornamented with raised, angular, spiral threads (12 to 

 15 on the penultimate whorl, of which the posterior are finer 

 than the anterior ones), crossed by flexuous striae. The nodu- 

 lations on the last whorl are six, large, faintly traceable to the 

 suture as oblique undulations, and vanishing anteriorly at the 

 base, which is contracted into a long, slightly flexuous, lirate 

 and transversely striated beak. 



Length, 27; breadth, 9; length of aperture and canal, 16. 

 ^ Localities. — Clayey green sands, Adelaide bore ; and " Tur- 

 ritella clays," Blanche Point, Aldinga Bay. 



12. Fusus tholoides, spec. nov. Plate iii., fig. 11. 



Shell fusiform, with a short spire ending in a very blunt 

 hemispheric apex. Whorls five, the first smooth, depressed ; 

 the second high, flatly convex, radially ribbed and spirally 

 lirate ; the third slightly angular medially with similar but 

 stronger ornament ; the anterior whorls angularly convex, 

 slightly angled, and crenately serrate at the shoulder ; faintly 

 transversely costated (about 10 to a whorl), and irregularly 

 cancellated by spiral lirae and transverse threads. There are 

 about 10 lirje on the posterior slope of the penultimate, and 

 six alternately stout and slender on the front. 



The last whorl is obscurely flatly rounded in the middle 

 where the costfe fade away, thence abruptly contracted in a 

 long, straight, open beak ; base with numerous granularly 

 wrinkled lirae ; the interspaces closely cancellated. 



Length, 22 ; breadth, 9 ; length of canal and aperture, 15. 



Locality. — Clayey-green sands, Adelaide bore. 



13. Fusus Aldingensis, spec. nov. Plate iii., fig. 10. 



The young shell resembles F. tlioloicles, but has a broader 

 spire, smaller blunt apex, the whorls subimbricating with a 

 suprasutural angulation crowned with stronger serrations. 



Length, 22 ; breadth, 9"5 ; length of canal and aperture, 16. 



Adult specimens of seven whorls have the anterior whorls 

 sharply keeled in the anterior third, obliquely plicated, the 

 plicse (10 to a whorl) forming wedge-shaped tubercles on the 

 keel ; the whole surface is finely cancellated by slender spiral 

 threads and transverse striae. At this stage the species simu- 

 lates Fasciolaria cristata (see p. 151), but apart from other 

 differences the incisions on the keel are very much shallower 

 and the projections very much smaller and pointed. 



Length, 35 ; breadth, 14!"5 ; length of aperture and canal, 20. 



Locality. — Turritella-clays, Blanche Point, Aldinga Bay. 



