BULIMULUS-PROTOGLYPTUS. 93 



lengthened form, shallower sutures, rounder aperture and the cloth- 

 ing of hairs. It is very abundant in gardens in the town of Santa 

 Cruz de la Sierra, burying itself in the earth during the dry season. 



*** 



The following species differ considerably from those just described. 

 They are solid, cretaceous Bulimuli with the apex very obtuse, with 

 apical dimple ; first whorl sculptured with curved spaced riblets, 

 second whorl with these riblets beaded. Aperture about half the 

 length of shell, with obtuse, unexpanded lip. 



B. GLYPTOCEPHALUS Pilsbry. PI. 5, figs. 62, 63, 64. 



Shell narrowly perforated, long ovate, solid and thick, of chalky 

 texture. White or bluish-white, the apical whorl buff, the next bluish 

 below, pale above. Surface irregularly and coarsely wrinkle- striate 

 and conspicuously malleated ; apical whorl with conspicuous, arcuate 

 riblets, becoming closer and beaded on the second whorl. Spire conic, 

 the apex very obtuse, sutures impressed. Whorls 5J, weakly con- 

 vex, the last suture slightly more descending along the latter half, 

 and consequently a trifle oblique to the others. 



Aperture a trifle exceeding half the total alt. of shell, subvertical, 

 white inside, with a faint, narrow baud at position of the periphery 

 and another wide one above; outer lip blunt, obtuse, not expanded; 

 columella concave below, straighter above, the columellar region 

 broadly dilated above, reducing the umbilicus to a chink ; parietal 

 callus white, rather thin. Alt. 31, diam. 17 mill. ; alt. of aperture 



15 mill. 



Peru (A. Agassiz). 



Bulimulus glyptocephalus PILSBRY, Proc. Acad. Nat. Sci. Phila., 

 p. 21, Feb. 23, 1897. 



A peculiar form, unlike any Peruvian species known to me except 

 the next, in the characters of the earlier whorls. It differs from the 

 following species in its elliptical-ovate shape and larger aperture. 



B. SARCOCHROUS Pilsbry. PL 5, figs. 65, 66. 



Shell narrowly umbilicated, ovate-conic, solid and strong. 

 Fleshy-white, becoming flesh-pink and then brownish above, the 

 earlier two whorls brown below, white above. Surface irregularly, 

 weaklv striate, more wrinkled below the sutures, faintly malleated 



/ 



on the body-whorl : apical sculpture as in the preceding species, ex- 

 cept that the riblets are less prominent and are much finer and 



