282 Bt)LIMULUS, AMPHIDROMUS. 



Whorls 5, a little convex. Columella roseate, nearly erect. Aper- 

 ture ovate, a little exceeding half the total length, lead-colored 

 within, peristome narrowly reflexed, roseate, at the base forming an 

 indistinct angle with the columella. Length 44, diam. 23, length of 

 aperture 24, width 13 mill. (Da Costa). Ecuador. 



S. (D.) indentatus DA COSTA, Proc. Malac. Soc. Lond. iv, p. 239, 

 pi. 24, f. 8 (Oct., 1901). 



"This shell with a few other examples was collected many years 

 ago by the late Mr. Clarence Buckley during his extensive travels in 

 Ecuador; it bears at first sight a resemblance to S. guerini Pfr., 

 from which it differs in the strong reticulated sculpture on the whorls, 

 its swollen and obtuse spire, and especially in the angular form of the 

 base of the aperture, at its junction with the columella ; moreover, 

 S. guerini has hitherto been found only in Venezuela, and in the 

 opinion of both Mr. Reeve and Mr. Pilsbry, is but a small variety of 

 S. moritzianus, a view in which the writer fully concurs." (Da Costa.) 



BULIMULUS COMPACTUS Fulton. 



Shell oblong-conic, thin, very narrowly umbilicated: apical whorls 

 reddish brown, others whitish, with numerous narrow oblique stripes 

 of red-brown ; the last three have a rugose and somewhat malleated 

 appearance ; nucleus smooth, except for some short, oblique, micro- 

 scopic striae at the suture ; whorls 6, moderately convex, rapidly- 

 increasing in size, the last equal to two-thirds the height of the 

 whole shell, aperture oval, interior light brown, peristome thin,, 

 simple. Alt. 16, maj. diam. 9 mill. (Fulton.} Chicani, Bolivia* 



Bulimulus compactus FULTON, Ann. and Mag. Nat. Hist. (7th 

 Ser.), ix, p. 69 (Jan. 1, 1902). 



Near B. exornatus Rve., and B. cinereus Rve., but differing from 

 both in having fewer and more rapidly-increasing whorls. B. exor- 

 natus has strong radial riblets on the apical whorls, whereas they are 

 almost smooth in B. compactus (Fulton). 



AMPHIDROMUS PERAKENSIS Fulton. PI. 60, figs. 19, 20, 21. 



" Shell dextral or sinistral, solid, general form as figured, imper- 

 forate, polished, yellow with a narrow conspicuous band at the suture ; 

 whorls 7-|, slightly convex, with weak oblique striae or lines of 

 growth ; columella bearing a thin and somewhat flat projecting plate, 

 situated interiorly at about a third of a volution from the exterior ; 



