1 04 BULIMULUS-NAESIOTUS. 



above, arcuately joined with the straightened columella. Alt. nearly 

 18, greater diam. 8, lesser 7} mill. ; aperture 6 mill, long, 4 wide. 



(Reibiscli). 



Charles Island (Wolf). 



Bulimulus (Ncesiotus) nudus KEIB., Isis, 1892, p. 21, pi. 1, f. 15. 



Described from two dead shells. It is placed under B. rugulosus 

 as a doubtful synonym by Dall. "In form this species stands between 

 sculpturatus and rugiferus ; it is mainly differentiated from these by 

 the greater size and less pronounced sculpture." (Reibiscli). 



B. PLANOSPIRA Ancey. PI. 16, fig. 48. 



Shell rimate, oblong with long spire; brown, lighter above, with 

 two purple-brown spiral bands ; rather thin. Spire distinctly attenu- 

 ated above, the apex obtuse; nepioiiic 21 whorls vertically ribbed, 

 the riblets becoming much closer on the latter half of the last ; fol- 

 lowing whorls with unequally spaced obliquely longitudinal narrow 

 but strong folds, crossed by crowded cord- and thread-like spiral striae. 

 Whorls about 7, very convex, the last two tumid below the deeply 

 constricting sutures ; last whorl somewhat flattened peripherally. 



Aperture oblong, slightly oblique, purple-banded inside ; peristome 

 thin, simple; columellar margin wide, white. 



Alt. 18, diam. 8 mill. ; aperture 7 mill, high, 5 wide. 



Northeast end of Charles Island, at about 200 feet (Dr. Baur). 



Bulimus eschariferus REEVE, Conch. Icon., pi. xx, fig. 121 (bad, 

 text excl.), 1848. Bulimulus rugulosus var. planospira ANCEY, 

 Bull. Soc. Mai. de France, IV, p. 294, 1887. Bulimulus (Nassiotus) 

 planospira Anc., DALL, Proc. A. N. S. Phila., 1896, p. 432, pi. 16, 

 f. 3. 



"This is one of the most elegant species of the group. It is very 

 closely related to B. rugulosus from which it may be discriminated 

 by its larger size and greater number of whorls, and by the deeper 

 suture and more lax manner in which the last whorl is coiled. In 

 B. planospira the spiral sculpture is usually more elevated and con- 

 spicuous. It has been found only on a limited portion of Charles 

 Island, while rugulosus is common on both Charles and Chatham." 

 (Dall). 



B. USTULATUS (Sowerby). PI. 23, figs. 16 ; pi. 16, figs. 49-52. 



Shell small, umbilicate, oblong with elevated spire, rather thin 

 but solid. Rusty brown, with irregular oblique yellow streaks, or 



