BULIMULUS-NAESIOTUS. Ill 



to the apex. Out of seven specimens before me, four show a narrow, 

 pale band on the last whorl, another has it faintly traced, while on 

 two it is absent. The lip is dark colored. Three of the specimens 

 have the base of the pillar very prominent, almost channelled, the 

 others are quite normal. The shell is midway between the typical 

 eschariferus and the var. ventrosus in size. One specimen before me 

 is but 11*6 mill, long, 5*5 wide, with hardly 6 whorls, although the 

 lip proclaims it an adult. Such dwarfs occur in other species of 

 this group. The first reference of it to B. rugulosus by Herr Rei- 

 bisch was undoubtedly an error, which that gentleman detected 

 upon examining the specimens in the British Museum. 



B. JACOBI (Sowerby). PI. 22, fig. 13. 



Shell small, ovate-conic, narrowly umbilicate, thin : brown, with 

 a peripheral pale girdle, sometimes bordered with darker above and 

 below. Surface dull, wrinkle-striate, with numerous, fine, unequal, 

 granose spiral striae, every fifth or sixth being larger. Spire conic, 

 the apex obtuse, nepionic If whorls costellate. Whorls about 6, 

 convex, the last rounded. 



Aperture short-oval, slightly oblique, contained about 2? times 

 in alt. of shell ; peristome thin, hardly expanded, everywhere arcu- 

 ate ; columellar margin expanded ; columella concave. 



Alt. 10, diam. 51, length of aperture 4 mill. 



Alt. 10, diam. 61, length of aperture 5 mill. (Pfr.). 



James Island (Cuniing) ; Charles Island (Cuming) ; 1,600 ft. 

 near Wreck Bay, Chatham Island, on the under side of leaves of 

 plants (var. pallidus}, and on East Albemarle Island (Dr. Baur) ; 

 Albemarle Island, 200-800 ft. on bushes and stones (Wolf, fide Rei- 

 bisch) (var. pallidus) \ Chatham Island, 900-2,000 ft., in damp 

 places and on the trunks of trees (var. acutus) (Wolf). 



Bulinus jacobi SBY.,P. Z. S., 1833, p. 74 (James Id.) Conch. 111., 

 p. 7, figs. 45, 45 (2 vars.) 1833. Bulimus jacobi DESH. in Lam. An. 

 s. Vert., ed. ii, vol. viii, p. 281, 1838. PFR., Mon. Hel. Viv. II, p. 98, 

 1848 (not of Reeve, Conch. Icon., pi. xxi, fig. 135, \S4S=B. olla. 

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

 phalostyla) jacobi H. & A. ADS., Gen. Rec. Moll., ii, p. 161, 1855. 

 Bulimus (Ncesiotus) jacobi ALBERS, Helic., p. 162, 1850. Bulimulus 

 (Nesiotes) jacobi MARTENS, in Albers, ed. ii, p. 221, 1860 Bulimulus 

 (Ncesiotus) jacobi PFR., Norn. Hel. Viv, p. 254, 1881. REIBISCH, 

 Isis, 1892, p. 18. DALL, Proc. A. N. S. Phila., 1896, p. 436. Not B. 



