BULIMULUS-NAESIOTUS. 113 



No living specimens of this species appear to have been collected. 

 This variety is hardly separable from the smaller B. jacobi, though 

 the dead and the fresh shells appear quite dissimilar. It is some- 

 what smaller than the smallest undoubted jacobi, and the granular 

 sculpture is more dense and uniform. I have not seen any speci- 

 mens with a spire as long and pointed as in Reibisch's figure. A 

 specimen sent by him agrees in every way with those collected by 

 Dr. Batir. 



Resembles a dwarf B. jacobi with very sharp, beaded, alternate 

 granulations in spiral rows; transverse wrinkles small but distinct; 

 the spire pointed but the apex rather blunt. 



B. OLLA Ball. PI. 23, figs. 18, 19. 



Shell umbilicate, ovate-conic, thin, light brown with a faint, 

 hardly noticeable paler peripheral zone ; somewhat shining; nearly 

 smooth, but showing under the lens faint growth-lines and traces 

 of a few spirals composed of oblong granules. Spire conic, the 

 apex obtuse. Whorls about 7, convex, the last rounded. 



Aperture ovate, slightly oblique; peristome thin, unexpanded, 

 colurnellar margin dilated ; columella slightly concave, a trifle 

 truncate below. 



Alt. 14, diam. 8, alt. of aperture 6 mill. 



James Island (Cuming) ; Duncan Island, all dead, but fresh (Dr. 

 Baur) ; Barrington Island, dead (Dr. Baur) ; Conway Bay, Indefa- 

 tigable Island (Dr. Baur). 



Bulimus jacobi REEVE, Conch. Icon., Bulimus, pi. xxi, fig. 135, 

 1848. Bulimulus olla DALL, Nautilus, VII, p. 53, September, 1893. 

 Bulimulus (Ncesiotus') olla DALL, Proc. A. N. S. Phila., 1896, p. 

 437, pi. 1 6, f. 2. 



" This shell is closely related to B. jacobi, and was figured by 

 Reeve under that name. B. olla is larger, and wants the granula- 

 tions of B. jacobi, its surface is nearly smooth and almost polished, 

 marked with faint incremental lines, has seven whorls (against six 

 in the other species) and a very bulbous pillar. The present spe- 

 cies inhabits the grassy upper zone, while B. jacobi is found in the 

 wooded area " (Dall}. 



B. TANNERI Dall. PI. 23, fig. 25. 



Shell short, stout, pointed, with two nepionic and four subsequent 

 whorls; nucleus rather coarsely transversely ribbed, the interspaces 

 somewhat wider ; the subsequent whorls marked by incremental 



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