1896.] NATURAL SCIENCES QF PHILADELPHIA. 443 



spire. Reibisch's figure gives the impression of a more slender shell 

 than the specimen I have examined. 



Bulimulus (Naesiotus) sculp turatus Pfeiffer. 



Bulinms sculptnratus Pfr., P. Z. S., 1846, p. 29 (Gal. Is.). Mon. Hel. 

 viv., II, p. 183, 1848 ; IV, p. 476, 1859. 



Bidimus {Ncesiottis) sculptnratus Pfr., Mai. Blatt. ii. Vers., p. 161, 1854. 



Bulimus sculptnratus 'ReQve, Conch. Icon., pi. XX, fig. 125, 1848. 



Bulimulus ( Omphalostyla) sculpturatui H. & A. Ads., Gen. Eec. Moll., ii, p. 

 161, 1855. 



Bulimulus [Nesiotes] sculptnratus Martens, in Albers, Heliceen, Ed. ii, p. 

 220, 1860. 



Bulimulus {NcBsiotus) sctdptui atus Pfr., Nona. Hel. viv., p. 254, 1881 ; Kei- 

 bisch, Isis, p. 10, 1892 ; Stearns, Proc. U. S. Nat. Mus., xvi, p. 427, 1893. 



The particular island to which this species, collected by Darwin, 

 belongs, is not known. I have not been able to obtain a specimen 

 for examination. Reeve's figure recalls a specimen, of B. Simrothi 

 in which the lip has not yet been developed fully, but if his meas- 

 urement is correct, the shell should be a little larger as well as more 

 slender than in B. Simrothi. 



Bulimulus (Naesiotus) rugiferus Sowerby. 



Bulimus rngi/erns Shy., P. Z. S., 1833, p. 36 (James Id.), Conch. 111., fig. 

 40, 1833. 



Cochlicellns rugifer'SiQck, Index, p. 63 No. 11, 1838. 



Bulimus rtigiferus Desh. in Lam. An. s. Vert., Ed. ii, vol. viii, p. 276. 

 1838. Pfr. Mon. Hel. viv., II, p. 115, 1848. Reeve, Conch. Icon., XX, fig. 

 118, 1848. 



Bulimulus {Omphalostyla) rugiferus H. «fe A. Ad., Gen. Eec. Moll., II, p. 

 161, 1855. 



Bulimulus [Nesiotes) rugiferus Martens, in Albers, ed. ii, p. 220, 1860. 



Bulimulus [JVcFsictus) rugiferus Pfr., Nom. Hel. viv., p. 254, 1881. Reibisch, 

 Isis, 1892, p. 9. Stearns, Proc. U. S. Nat. Mus., XVI, p. 427, 1893. 



James Island, Cuming. 



This species is related to B. nesioticus and B. Reibischi from both 

 of which it is distinguished l)y details of form. I have seen a num- 

 ber of specimens, but all were from the original series in the Cumin, 

 gian Collection. 



Bulimulus (Naesiotus) nesioticus Dall n. s. Plate XVI, fig. 1. 



Shell small, thin, pale brown, with two nepionic and five subse- 

 quent whorls ; spire slender, suture distinct, umbilicus small or ob- 

 solete, apex rather blunt with an axial dimple, nepionic whorls 

 transversely ribbed with fine, even regular riblets with about equal 

 interspaces ; the next whorl is sculptured with fine spirals, close set, 

 under which are fine transverse wrinkles; the subsequent whorls 

 show a more or less variable transverse ribbing, in which the ribs 

 have a tendency to break up and vary in direction ; these are crossed 



