246 SCAPHANDER. 



S. PUNCTOSTRIATUS Mighels. PL 31, %. 16. 



Shell rather solid, ovate, somewhat narrower but not constricted 

 above, the vertex very narrow, scarcely truncated. Surface sculpt- 

 ured with tine spiral, distinctly punctured grooves. Vertex narrow, 

 not distinctly margined, and but slightly concave, the lip inserted in 

 the middle. Aperture narrow above, broad below ; outer lip reced- 

 ing toward the upper insertion, somewhat effuse below. Columella 

 broadly concave, bordered by a narrow white callus, the parietal 

 callus slight and translucent. Only the last whorl is visible from 

 the base. Color buff or pale brown, the interior of the aperture shin- 

 ing, porcellanous, white. Alt. from 8 to 30 mill. 



Iceland, Shettland and Nomvay to Bay of Biscay, and off Azores 

 (1000 fms.) ; Palermo, 60 fms. ; northwest Atlantic from Maine and 

 Massachusetts to Culebra I., (390 fms.) and Barbados (288 fms.), 

 and Gulf of Mexico, 533 fms. 



Ballapunctostriata MIGH., Proc. Bost. Soc. N. H. i, 1841, p. 49 ; 

 Bost. Journ.' N. H. iv, 1842, p. 43, pi. 4, f. 10. Scaphander puncto- 

 str tutus OLD., Inv. Mass. (edit. W. G. B.), p. 215, f. 505. VERRILL, 

 Tr. Conn. Acad. vi, p. 273. DALL, Blake Gastr., p. 52. SARS, 

 Moll. Reg. Arct. Norv., p. 292, pi. 18, f. 6. JEFFREYS, Brit. Asso. 

 Rep. 1884, p. 554. WATSON, Chall. Rep. Gastr., p. 642. A. AD., 

 Thes. ii, p. 575, pi. 121, f. 50. Sows., Conch. Icon., f. 2. & librar- 

 ius LOVEN, Ind. Moll. Scand. in Ofv. Vet. Akad. Forh., 1846, p. 

 142. JEFFREYS, Brit. Conch, iv, p. 446; v, p. 224, pi. 102, f. 9; 

 P. R. S. Lond. xxv, p. 185, 194, etc. ; Ann. Mag. K H. (4), xix, p. 

 335. MONTS., Enumerazione, etc., p. 51. 



This species inhabits comparatively shallow water in the north, 

 but the southern localities are all for examples dredged in great 

 depths. The regularly ovate form and conspicuously punctate striaa 

 are its more prominent features. 



Var. clavus Ball. 



These specimens exhibit a bluntness at the apex and a more 

 Bulla-like form than the typical ones, and may form a variety ciavus, 

 distinguished from the type by the above features and by the simple 

 apex, where the axis is prolonged into the outer lip directly without 

 being twisted so as to form a sort of cup, as in the type of the 

 species. 



West Indies, 288-553 fms. 



