142 ' HELCIONISCUS. 



H. TRAMOSERICA Marty n. PI. 70, figs. 49, 50, 51, 52. 



Shell solid, short-oval, conical, the apex erect, near the center or 

 somewhat anterior. Surface sculptured with numerous (about 40) 

 narrow ribs, with usually an interstitial small riblet in each interval, 

 the concentric striae of growth crowded, sometimes prominent 

 enough to finely crenulate the radiating ribs. Color varying from 

 yellowish with blackish-brown rays, to reddish-brown with whitish 

 rays. 



Interior yellowish, lustrous, having dark rays and spots ; central 

 area having a whitish, orange or olive callus. 



Length 46, breadth 40, alt. 17 mill. 



Wellington, New Zealand ; Chatham Is. ; New South Wales, Aus- 

 tralia. 



P. tramoserica MARTYN, Univ. Conch, i, t. 16. REEVE, Conch. 

 Icon. f. 27. P. antipodum E. A. SMITH, Voy. Erebus and Terror, 

 Moll. p. 4, t. 1, f. 25 (1874). Patinella tramoserica HUTTON, Proc. 

 Linn. Soc. N. S. Wales, ix, p. 377 (1884). ?P. pecten GMVL., Syst. 

 xiii, p. 3702. 



The ribs are numerous, their narrow intervals usually having an 

 interstitial riblet. The color is dull yellow or reddish, with dark 

 rays, which are sometimes seen to be fretted or dotted if held toward 

 the light. 



H. FLAVUS Hutton. 



Ovate, conical, radiately ribbed ; apex recurved ; margin 

 crenated ; pale yellow, inclining to orange toward the apex ; interior, 

 above the muscular-impression more or less orange, below silvery. 



Length 2'2, breadth 1-8, alt. 1 inch. (Hutton.) 



Poverty Bay to Stronghurst, Canterbury, New Zealand. 



P.flava HUTTON, Cat. Mar. Moll. N. Z., p. 44, (1873) ; Man. K 

 Z. Moll., p. 109, (1880). Patinella flava HUTTON, Proc. Linn. Soc. 

 K S. Wales, ix, p. 378. 



The description of this form is scarcely sufficient. 



H. ILLUMINATA Gould. PI. 70, figs. 40, 41, 42. 



Shell elevated conical, with an arched outline, the apex at about 

 the anterior fourth ; surface covered with numerous small, obtuse, 

 radiating ribs, with from one to three intervening striae ; concentric 

 lines of growth crowded, very faint. Color sooty, with scattered, 

 yellowish spots, about twenty in number somewhat regularly dis- 



