BULIMULUS-NAESIOTUS. 107 



Bulimus nucula PFR., P. Z. S., 1852, p. 60 (Gal. Is.) ; MOD. Hel. 

 Viv., Ill, p. 415, 1853 ; IV, p. 475, 1859. Bulimus (Ncesiotus) 

 nucula PFR., Mai. Blatt. II, p. 161, 1854. Bulimulus (Omphalo- 

 styla) nucula H. & A. AD., Gen. Rec. Moll., II, p. 161, 1855. 

 Bulimulus (Xesiotes} nucula MARTENS, in Albers Heliceen, ed. ii, 

 p. 221, 1860. Bulimulus (Ncesiotus) nucula PFR., Nona. Hel. Viv., 

 p. 254, 1881. REIBISCH, Isis, 1892, p. 15, t. i, fig. 2. DALL, Proc. 

 Acad. N. S. Phila., 1896, p. 433. Bulimulus (Ncesiotus} nux var. 

 STEARNS, Proc. U. S. Nat. Mus., xvi, pp. 380, 426, 1893. 



" A specimen collected by Dr. Baur, submitted to Mr. Edgar A. 

 Smith of the British Museum, was said to be somewhat darker 

 colored and more coarsely striated than the type of nucula in that 

 collection. These are, however, trivial differences under the circum- 

 stances. It agrees closely with a specimen sent by Reibisch under 

 the name of nucula. It is a smoother, smaller and more compact 

 shell than rugulosus, and shows a somewhat attenuated and dark 

 colored apex, resembling that of galapaganus Pfr. It is, perhaps, 

 most closely related to B. ustulatus or B. calvus Sby., and a sufficient 

 series might very likely connect them." (Dall). 



The figure is drawn from a specimen received from Dall, no. 107- 

 469, U. S. Nat. Mus. 



B. GALAPAGANUS (Pfeiffer). PI. 22, fig. 7. 



Shell compressed-umbilicate, ovate turrited thin, striatulate, silky, 

 pellucid, corneous-waxen. Spire convexly turrited, rather acute ; 

 suture somewhat marginated. Whorls 8, the last about one-third 

 the length of shell, compressed around the umbilicus. 



Aperture subvertical, oblong-oval ; peristome simple, the right 

 margin arcuate above, a trifle expanded, forming an angle with the 

 columella, which is somewhat twisted within. Alt. 15?, diam. 6, 

 length of aperture 51 mill. (Pfr.}. 



Charles Island, at about 200 ft. elevation, near the northeast end 

 of the island (Dr. Baur). 



Bulimus galapaganus PFR., P. Z. S., 1854, p. 58. Mon. Hel. 

 Viv, IV, p. 503, 1859. Buliminus (Ncesiotus') galapaganus PFR., 

 Mai. Blatt., II, Vers., p. 160, 1854. Bulimulus (Nesiotes) galapag- 

 anus MARTENS, in Albers Heliceen, ed. ii, p. 221, 1860. Bulimulus 

 (Ncesiotus') galapaganus PFR., Nom. Hel. Viv., p. 1881. REIBISCH, 

 Isis, 1892, p. 20. STEARNS, Proc. U. S. Nat. Mus., XVI, p. 427, 

 1893. BALL, Proc. A. N. S. Phila., 1896, p. 435. 



