153 



Shell turriculate. 



Penultimate whorl subangulate with sub- 

 tuberculose costae and 4 liraj. 



Last whorl with about 20 lirre ; penul- 

 timate Avhorl with 10 costse. 



13. C. Etheridgei. 



Last whorl with 10 lirse; penultimate 



whorl with 12 costae; finely striated 



transversely. 14. C. caper ata. 



Penultimate whorl convex with slender 



cost^e, and 7 to 10 lirje. 



Costse nodosely crenulate; last whorl 

 rather ventricose. 



15. C. capillata. 

 Costte arcuate, thin ; lira3 fewer. 



16. C. micra. 



1. Cancellaria calvulata, sj>t'c. nov. Plate ix., fig. 3. 



Shell ovately ventricose, rather thin ; spire moderate, turbin- 

 ated, ending in an eccentric pullus of one and a half smooth 

 swollen whorls. Whorls three, excluding pullus, very convex, 

 separated by a rather narrow and deep channelled suture, the 

 shoulder rounded. Sculptured with rounded spiral ribs alter- 

 nately large and small (about fifteen on penultimate whorl), with 

 obscure transversely oblique plications (about twenty on penulti- 

 mate whorl), which crenulate the lira?, and with close-set trans- 

 verse thread-like striae. 



Aperture ovate, sharply angled at the front ; outer lip tliin, a 

 little spreading, crenulate on the edge, and strongly and closely 

 ribbed within ; columella oblique with three plaits ; umbilicus 

 moderately wide and deep. 



Dimensions. — Length, 16; breadth, 12; leng-th of aperture, 

 10 ; diameter of umbilicus, 2. 



Locality. — Blue clays at Schnapper Point. 



By its rounded whorls and ornament it differs from all living 

 species of the Section Trigonostoma, but has much resemblance to 

 C. exjndea, of the Piedmontese Pliocene, from which it difiers by 

 its more exsert spire, narrow channel, and the more numerous 

 transverse plications. 



2, Cancellaria laticostata, Tenison Woods. 



Reference. — Proc. Lin. Soc, jSF.S. Wales, vol. iv., tab. 2, fig. 8, 

 p. 17; 1879. 



A small ovate shell, spire obtusely turreted, whorls separated 

 by a deep channel, broadly ribbed (10 on last whorl), decussate. 

 Aperture entire, angular ; outer lip simple, ribbed within ; colu- 



