612 STUDIES ON AUSTRALIAN MOLLUSCA, 



ceding whorls; three equally spaced smooth spiral cords ornament 

 each whorl, broken into gemmules by a series of longitudinal 

 ridges; the interspaces longitudinally striated. Protoconch of 

 three whorls, first smooth, second and third bicarinate, crossed 

 by numerous fine bars. Aperture subquadrate, exserted, anal 

 notch simple, spur almost but not quite reaching the pillar. 

 Length 6; breadth 1-8 mm. 



Among other faults, Adams gave the specific names of Triforis 

 a masculine termination. As, however, that generic name is 

 compounded from the Latin feminine substantive foris, the 

 specific name should have taken a feminine termination. 



Triphora tasmanica, T. Woods. 



T. Woods, Proc. Roy. Soc. Tas., 1875 (1876), p. 28. 



(Plate xxxii., fig. 22.) 



In general appearance this species is like T. angasi and T. 

 cinerea, bearing on each of the older whorls three equal gemmule 

 rows. There is a shell with a lilac apex, occurring in Tasmania 

 and South Australia, wdiich appears to be a variety of this. A 

 useful recognition mark is the brown dot between each gemmule 

 of the lower tier. But from every member of the genus T. tas- 

 manica is distinguished by its remarkable apex — I hesitate to 

 write protoconch. The shell commences with two rows of elevated 

 rounded gemmules, between which on the 4-5th whorl a median 

 row is intercalated. It is possible that a caducous larval shell 

 ma}^ have preceded the stage described. 



A shell of six whorls, 2*2 mm. long, dredged by Mr. G. H. 

 Halligan and myself in 100 fathoms, 16 miles east of Wollongong, 

 is here figured. It is the only record of the species from New 

 South Wales, and has been determined by a careful comparison 

 with the type specimen kindly lent me by Mr. A. Morton. 



Triphora cinerea, n.sp. 



(Plate xxxiii., tigs. 36, 37.) 



Shell of moderate size, narrow, conical with straight sides. 

 Colour : base dark chocolate, spire marbled with ash and different 



