HELCIONISCUS. 137 



H. STRIGILIS Hombron & Jacquinot. Unfigured. 



Shell oval, convex, obliquely conical ; two-colored outside, above 

 blackish-rufescent, below brownish-rufescent, having few white dots ; 

 principal radiating ribs 24, subequal, obtuse, subprojecting beyond 

 the margin ; vertex obtuse, white, excentric. Interior blackish- 

 purple, the depth pale yellowish. Length 65, breadth 50 mill. 

 (H. & J.) 



Auckland Is. (H. & J.) ; Banks' Peninsula to Shag Point, Otago, 

 New Zealand; Auckland Is. ; Campbell Id. (Hutton). 



P. strigilis H. & J., Ann. Sci. Nat. (2) xvi, p. 190 (1841). P. 

 magellanica HUTTOX, Trans. X. Z. Institute xv, t. 16, f. A (denti- 

 tion only) ; Man. X. Z. Moll., p. 107 (1880), not of Gmelin ! Pati- 

 nella strigilis HUTTON, Proc. Linn. Soc. X. S. Wales, ix, p. 374 

 (1884). 



The original description is given above. This species I have not 

 seen. It certainly has nothing to do with Patinella magellanica, 

 wnea, kerguelensis or fuegiensis. 



Button's description in P. L. S. X. S. \V., 1884, is as follows : 



" Shell large, solid, obliquely conical, high, with about 20-30 low 

 radiating ribs ; the apex subcentral or rather anterior. Brown, 

 obscurely marked with yellowish ; interior greenish or yellowish- 

 brown above the muscle impression, bluish-white and iridescent 

 below it, the margin brown." 



The description in Man. X. Z. Moll, does not, of course, apply to 

 this shell. 



H. ORXATUS Dillwyn. PI. 68, figs. 14, 15, 16, 17, 18, 19; pi. 19, 



figs. 39, 40. 



Shell solid, oval or oblong, rather low-conical, the apex at about 

 the front third, erect. Surface having larger radiating, coarsely 

 nodular ribs, about 11 in number, with a somewhat smaller rib be- 

 tween each pair of larger ones, the intervals radiately striated ; 

 growth-strife fine, often quite distinctly cutting the radial stride. The 

 larger ribs are light, the intermediate ribs are black dotted with white, 

 especially in the young, this coloring being less obvious on large 

 shells. 



Interior having alternating silvery and black rays, the latter 

 usually 11 in number; the large central area black, suffused more 

 or less with cream color in the depth of the apex. 



Length 32, breadth 25, alt. 10 mill. 



Throughout New Zealand. 



