HOLOSPIRA, SUBG. METASTOMA. 97 



structed by a strong fold within the right margin, and a 

 callous ridge upon the columella. Type H. roemeri Pfr. 

 (meta, after or among, but here used in the sense of 

 ''changed;" stoma, mouth). 



21. H. ROEMERI (Pfeiffer). PI. 25, figs. 1-7. 



Shell rimate or perforate, cylindric, often a little wider 

 above than below, terminating in a rather short cone above; 

 rather thin, pale brown. Surface somewhat glossy, smooth 

 except for light growth-lines, but finely and rather sharply 

 striated on the terminal cone. Whorls 12% to 14, but slightly 

 convex, the last tapering, strongly carinate beneath, its latter 

 portion sinuous, becoming sinistral, shortly free in front; 

 base excavated, concave. Aperture oblique, oblong, the long- 

 est axis parallel to that of the shell, contracted by a callous 

 barrier deep in the throat on the columellar side, and a prom- 

 inent, angular fold within the right lip. Peristome contin- 

 uous, free, slightly reflected. Internal column smooth, mod- 

 erately large, its diameter about one-fourth that of the shell, 

 of nearly equal calibre throughout. 



Length 15.7, diam. 4.5 mm. ; whorls 13%. Near El Paso. 



Length 14, diam. 4.4 mm.; whorls 13%. Near El Paso. 



Length 13-14, diam. 4.5 mm.; whorls 14. New Braunfels 

 (Pfr.) 



Length 12, diam. 3.8 mm.; whorls 12%. New Braunfels. 



Length 12, diam. 4.2 mm.; whorls 11. Sacramento Mts. 



Length 13, diam. 4 mm. ; whorls 12. Sacramento Mts. 



Length 14.8, diam. 4 mm.; whorls 12%. Sacramento Mts. 



Texas: New Braunfels, Comal Co. (Roemer, Singley et al.) ; 

 Howard's Spring, Crockett Co. (Binney) ; Devil's Biver 

 region and Painted Cave, near the mouth of the Pecos River, 

 Val Verde Co. (W. Lloyd) ; Franklin Mt, near El Paso 

 (J. H. Ferriss). Also southern New Mexico, in Alamo 

 Canon, near Alamogorda, Otero Co., in the foot-hills of the 

 Sacramento Mts. (Rehn and Viereck). 



Cylindrella roemeri PFR., Mon. Hel. Viv., ii, p. 382 (1848) ; 

 iii, 579; iv, 710; vi, 389; Conchyl. Cab., p. 62, pi. 7, f. 4-6 

 (bad); Roemer 's Texas, p. 456 ( 1849 ) . BINNEY, L. and- 



