106 BULIMULUS-NAESIOTUS. 



somewhat wrinkled longitudinally, with decussating spiral striae on 

 the spire, absent below. Spire slightly attenuated above, the apex 

 obtuse, If earlier whorls costellate, the rest convex, last whorl 

 rounded at the periphery. 



Aperture contained about 2? times in alt. of shell, oval ; peristome 

 thickened. 



Alt. 12 , diam. 6, alt. of aperture 5 mill. 



Alt. 13, diam. 6, alt. of aperture 4f mill. 



Alt. 14, diam. 6, alt. of aperture 5J mill. (P/r.). 



James Island (Cuming) ; Charles Island (U. S. Fish Commission, 

 Cuming and Wolf) ; Chatham Island (Kellett). 



Bulinus calvus SBY., P. Z. S., 1833, p. 72 (James Island) ; Conch. 

 111., p. 6, fig. 41, 1833. Bulimus calvus DESH. in Lam. An. s. Vert, 

 ed. ii, vol. viii, p. 179, 1838. PFR., Mon. Hel. Viv., II, p. 225, 

 1848 ; Chemn. Conch. Cab., ed. ii, Bulimus, t. 62, figs. 37, 38. 

 Buliminus calvus BECK, Ind. Moll., p. 70, 1838. Bulimulus (Om- 

 phalostyla) clavus H. & A. AD., Gen. Eec. Moll. II, p. 161, 1855. 

 Bulimus calvus REEVE, Conch. Icon., pl.xx, fig. 126, 1848. Bulim- 

 ulus (Nesiotes) calvus MARTENS in Albers, ed. ii, p. 221, 1860. 

 Bulimulus (Ncesiotus) calvus PFR., Nona. Hel. Viv., p. 254, 1881. 

 REIBISCH, Isis, 1892, p. 18, t. i, fig. 8. STEARNS, Proc. U. S. Nat 

 Mus., xvi, p. 427, 1893, ex parte. DALL, Proc. Acad. N. S. Phila., 

 1896, p. 433. 



Smoother than B. ustulatus, with less variegated coloration. " It 

 is closely related to B. ustulatus and is rather nearly approached by 

 certain dwarfish, unusually smooth specimens of B. rugulosus. B. 

 nucula Pfr. is also closely allied." 



B. NUCULA (Pfeiffer). PI. 22, fig. 6. 



Shell narrowly umbilicated, ovate-conic, rather solid, very subtly 

 rugulose-striate ; brownish-corneous, generally with a single pale 

 girdle. Spire convex-conic, acute. Whorls 6, a trifle convex, the 

 last a little shorter than the spire, slightly compressed at base. 



Aperture little oblique, somewhat semi-oval, angular at base ; per- 

 istome simple, unexpanded, the right margin very arcuate above, 

 columellar margin reflexed, spreading. Columella straightened, 

 obliquely subtruncate at the base. Alt. 11 J, diam. 6, alt. of aperture 

 5* mill. (P/r.). 



Charles Island (Wolf) ; Chatham Island near the S.- W. end at a 

 height of 1,600 feet (Baur). 



