CANTHARIDUS. 



123 



T. capillaceus Phil., Zeitschr. f. Mai, 1848, p. 102 ; Conchyl. Cab., 

 p. 275, t. 40, f. 7.— Fischer, Coq. Viv., p. 161, t. 52, f.S.— T. epis- 

 copus HoMBR. ET J ACQ. Vov. au Pole-Sud, t. 14, f. 9-11. — Kiener, 

 Species gen. Trochus, t. 52, f. 3. — T. pruininus Gould, Otia, p. 55 

 (1846) ; U. S. Expl. Exped.,t. 12, f. 2i)^.— Gantharidus Zealandicus 

 A. Ad., p. Z. S., 1851, p. 169.— Hutton, Manual N. Z. Moll., p. 99 

 (1880). — C. pruininus Hutton, Proc. Linn. Soc. N. S. Wales, ix, 

 p. 361 (1884). 



The species exhibits considerable variation in the comparative 

 length of the spire, but may be known from other species by the 

 very fine close spiral striation of the outer surface and the dark 

 purplish color. 



Var. PEROBTUSA Pilsbry. PL 34, fig. 1. 



Spire short, vey-y obtuse at apex ; whorls 5, the last large, descend- 

 ing antei'iorly; aperture as long as spire; other characters as in C. 

 pruininus. Alt. 20, diam. 19 mill. 



C. TENEBROSUS A. Adams. PI. 34, fig. 3. 



Shell conical, elevated, imperforate, rather thick, solid, dark bluish- 

 black, or -with a purple shade; spire conoidal, sutures slightly 

 impressed, apex somewhat obtuse, a trifle eroded and whitish at tip ; 

 whorls about 6, very slightly convex, those of the spire encircled by 

 about seven lirse of about the same width as their interstices, body- 

 whorl very bluntly subangular at periphery, with about 20 spiral 

 lirse, and fine delicate growth-lines ; aperture rounded-quadrate, 

 oblique, less than i the total length of shell ; outer lip very narrowly 

 black-edged, bordered by a series of short fine sulcations, beyond 

 which there is a porcellanous thickening; throat nacreous, irides- 

 cent, the reflections mainly green ; columella subvertical, a trifle 

 arcuate, rounded and pillar-like, covering the umbilicus above; 

 parietal wall with a thin whitish callous; upper angle of aperture 



angular, slightly channeled. Alt. 11 2, diam. 9h mill. 



Neiv Zealand. 



C. tenebrosus X. Ad., P. Z. S., 1851, p. 170, no. 11. — Hutton, 

 Manual N. Z. Moll, 1880, p. 101 ; Proc. Linn. Soc. N. S. Wales, ix 

 (1884) p. 361. 



Narrower and more coarsely sulcated than C. huttoni. 



Var. HUTTONii Smith. PI. 34, fig. 2. 



Shell short-conical, covei'ed perforate, bluish-black or purplish- 

 black, the apex worn white ; whorls 5 to 6, slightly convex, sculpt- 



