122 BULIMULUS-XAESIOTUS. 



B. NESIOTICUS Dall. PL 24, fig. 38. 



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 

 by fine, often granulose spirals, which are swollen where they cross 

 the riblets ; aperture small, throat yellowish, the pillar white, widely 

 reflected without any terminal plait or callus, outer lip thickened, 

 somewhat expanded, continuous with the pillar and a slight callus 

 on the body. Length 12, breadth 5 mill. (Dall~). 



James Island (U. S. Fish Commission). 



Bulimuhis (Ncesiotus) nesioticus DALL, Proc. Acad. Nat. Sci. 

 Phila., 1896, p. 443, pi. 16, f. 1. 



" This interesting species was obtained on James Island in small 

 numbers, one specimen fresh but none living, the one figured has 

 rather sparser ribbing than the best preserved specimen. Most of 

 them are bleached white. The shell appears to be intermediate in 

 character and size between B. sculpturatus as figured, and B. rugi- 

 ferus Sby. It was first referred to the latter species, but further 

 study showed B. nesioticus to have two whorls less in the same length 

 and to be a perceptibly stouter shell." (Dall). 



B. REIBISCHI Dall. PL 24, fig. 42. 



Shell elevated, slender, with nine whorls of a pale ferruginous 

 color and rather solid consistency ; sculpture like that of B. nesioti- 

 cus but rather more closely ribbed ; the suture distinct, somewhat 

 appressed, whorls little inflated but not flattened ; umbilicus a mere 

 chink ; aperture oval, higher than wide, rounded in front, the pillar 

 simple, the margins thickened but not reflected ; length 11, diame- 

 ter 2-5 mill. (Dall). 



Indefatigable Island, two specimens (U. S. Fish Commission). 



Bulimulus (NoBsiotus) reibischi DALL, Nautilus, viii, p. 126,. 

 March, 1895 ; Proc. Acad. N. S. Phila., 1896, p. 444, pi. 16, f. 4. 



" This shell, though shorter, is intermediate between such forms as 

 B. chemnitzioides and the more normal Ncesioti. It is named in 



