332 PROCEEDINGS OF THE ACADEMY OF 



Shell rimate, subcylindrical, broadest at the second whorl, from which it 

 gradually tapers towards the apex, which is obtuse, its first whorl and a half 

 being bulbous, and marked by numerous strong longitudinal ribs ; white ; 

 nearly transparent ; the longitudinal wrinkles of growth scarcely roughening 

 the almost smooth surface ; suture distinct ; whorls 8, flattened, regularly 

 and gradually increasing, the last equalling one-half the whole length of the 

 shell; aperture oblique, oval; peristome simple, hardly thickened, its ter- 

 minations approached, and made continuous by a white, upright callus, the 

 columellar portion expanded. 



But one specimen was found on a small species of Artemisia at Cape San 

 Lucas, Lower California by Mr. J. Xantus, and is preserved in the collection 

 of the Smithsonian Institution. 



BuLiMtrs pilula, n. s. T. umbilieata, globosa, infiata ; tenuis ; 

 longitudinaliter rugosa ; calcarea ; apex obtusa ; anfr. 4 convexi, ul- 

 timus inflatus, long, teste 10-11 aequans ; columella simplex, arcu- 

 ata ; apertura obliqua, rotundata ; perist. simplex, acutum, margine 

 columellari dilatato. Long. mill. 22, lat. 7. Ap. 9 longa, 6 lata. 

 Habitat in paminsula California?, ad " Todos Santos Mission," et 

 in insula " Marguerita." Saxa degens sub muscis. Specimina pluritn a col- 

 legit J. Xantus. 



Shell globose, inflated ; umbilicated ; thin ; with longitudinal wrinkles ; 

 chalk-colored ; apex obtuse ; whorls 4, convex, the last very inflated, equal- 

 ling 10-llths the length of the whole shell ; columella simple, arched ; aper- 

 ture oblique, rounded ; peristome simple, acute, its columellar end expanded 

 so as partially to cover the rimbilicus. 



Mr. Xantus found many of this species during his stay on the peninsular, 

 and is decidedly of the opinion that maturer specimens, if any existed, would 

 have been noticed by him. It frequents rocky spots, living under mosses. 



I can find no figure in Reeves' Monograph or description in Pfeiffer's works 

 of any species at all approaching it in shape. Bulimus sufflatus Gould, from 

 Lower California, of which I have seen a specimen, does not appear to be a 

 more mature form of it. The measurements are taken from the largest indi- 

 vidual. All the specimens are uniform in outline and other respects. 



BrjLiMtrs inscendens, n. s. T. rimata ; acuminato-oblonga ; ten- 

 uis ; rufo-brunnea ; striis incrementi et lineis minutis volventibus 

 decussata, apice lirata ; sutura mediocris ; anfr. 7 convexi, ulti- 

 mus 7-12 long, testse sequans ; apertura obliqua, oblongo-ovata, 

 perist. simplex, acutum, ad columellam reflexum ; paries apertur- 

 alis callo tenui induta. Long. mill. 36, lat. 10. Ap. 15 longa. 

 9 lata. 



Habitat in montibus arenosis pseninsulse California inter " Cape 

 San Lucas" et "Margarita Bay," inscendens in arbores "Copal" 

 dictas. (J. Xantus.) 



Shell rimate ; acuminately oblong ; thin ; reddish brown; de- 

 cussated with striae of growth and minute revolving lines, the api- 

 cial whorl and a half being ribbed ; suture moderate ; whorls 7, 

 convex, the last 7-12ths the shell's length ; aperture oblique, oblong-ovate ; 

 peristome simple, acute, reflected at the columella ; a thin callus on the parie- 

 tal wall of the aperture. 



The description is drawn from the most perfect specimen, which is some- 

 what smaller and more cylindrical than some of the others. On first receiving 

 a single specimen, I was inclined to refer it to B. excehus G-ld. A careful ex- 

 amination of the description of that species, however, and of a specimen lately 

 received, convinces me of its being distinct. Its peculiar characteristic is the 

 strongly ribbed, polished apicial whorls, differing from the decussated sculp- 

 turing of the remainder of the shell. 



[Oct. 



