BULIMULUS-NAESIOTUS. 119 



wrinkles, but no spiral stride. Spire convex-conic, the apex obtuse, 

 two nepionic whorls very finely, densely costulate. Whorls about 

 6J, slightly convex. 



Aperture irregularly ovate, acuminate above, contained about 2 

 times in length of the shell ; peristome simple, thin ; columellar 

 margin triangularly dilated, white. 



Alt. 10, diam. 5, length of aperture 4.25 mill. 



Chatham Island (U.S. Fish Commission). 



Bulimulus (Nesiotus) amastroides ANCEY, Bull. Soc. Mai. de 

 France, IV, p. 293, 1887. DALL, Proc. A. N. S. Phila., 1896, p. 441, 

 pi. 15, f. 16. Bulimulus jacobi STEARNS, Proc. U. S. Nat. Mus.,XVI, 

 pp. 381, 426, 1893, not of Sby. Bulimulus calvus var. ? STEARNS, op. 

 cit., p. 427. 



" The shell has an olivaceous tint which distinguishes it at once 

 from the mostly reddish or yellowish-brown species of which the 

 fauna contains so many. This is the smooth form of which the pli- 

 cate aspect is B. curtus of Reibisch and Anceiji of Dall " (Dall). 



B. CURTUS Reibisch. PI. 23, fig. 33. 



Shell resembles B. amastroides Ancey, but with more plicate sur- 

 face, ruder aspect, smaller mouth and more angular periphery. Alt. 

 9, diam. 4'5 mill. (Dall). 



Chatham Island, near Wreck Bay, at a height of 1,600 feet (Baur) ; 

 usually on the under surface of the leaves of plants. Also reported 

 from Chatham by Wolf (Reibisch) in grassy places and on the 

 trunks of trees, at from 900 to 2,000 feet, and by the U. S. Fish Com- 

 mission. 



Bulimulus (Ncesiotus) curtus REIBISCH, Isis, 1892, p. 21, t. i, fig. 14. 

 DALL, Proc. A. N. S. Phila., 1896, p. 442, pi. 15, f. 13 ; pi. 17, f. 8. 

 Bulimulus (Ncesiotus) amastroides Ancey, var. Anceyi DALL, Nau- 

 tilus, VII, p. 53, September, 1893. 



" This is very closely related to B. amastroides Ancey, of which 

 it is probably an offshoot. It has, in general, a more plicate surface, 

 ruder aspect, smaller mouth, and more angular periphery. Speci- 

 mens submitted by Herr Reibisch as representing his curtus agree 

 exactly with the types of my variety Anceyi" (Dall). 



B. CANALIFERUS Reibisch. PI. 23, figs. 34, 35. 



Shell long-conic, fusiform, perforate throughout to the nucleus, 

 thin, very glossy, delicately arcuate-striate ; buff or corneous 



