BULIMULUS-SCUTALUS. 33 



margin lightly arcuate, columellar margin callous and dilated 

 above, adnate, white. Alt. 40, diam. 17 mill. ; aperture 21 mill, 

 long, 10* wide. (P/r.). 



Mt. Antisana, Ecuador, 14,000 ft. (Bourcier); Cerro del Altar, 

 at Riobamba, near the snow line, 4,200 meters alt. (Stiibel). 



Bulimus anthisanensis PFR., P. Z. S., 1852, p. 155; Conchyl. 

 Cab., p. 104, pi. 33, f. 20, 21 ; Monogr., iii, p. 406. Bulimulus 

 (Scutalu^) antisanensis Pfr., ALB.-MART., Die Hel., p. 217. MAR- 

 TENS, Conch. Mittheil., p. 161. 



Stiibel's specimens were dark green-brown, with small yellowish 

 flecks, the dark color not so sharply confined to the lower half of 

 the last whorl as in the figures. 



B. CALIGINOSUS (Reeve). PL 4, figs. 43, 44, 45. 



Shell subimperforate, oblong-ovate, rather solid, obliquely rudely 

 striate, ashy or whitish, irregularly streaked with ferruginous brown. 

 Spire conic, rather acute. Whorls 6, slightly convex, the last about 

 as long as the spire, rotund at base. Aperture subvertical, oval ; 

 peristome simple, unexpanded, the columellar margin broadly re- 

 flexed and appressed above. Alt. 36, diam. 16 mill. ; aperture 19 

 mill, long, 10 wide. (P/r.). 



Ecuador : Tunguragua and Chimborazo (Bourcier) ; Cerro del 

 Altar, near Riobamba, near the snow line, 4,200 meters alt., and 

 Pitana in the eastern Cordillera of Quito, 3,600 meters (Stiibel) ; 

 Gasha Loma, near and above Chillogalo (Cousin). 



Bulimus caliginosus REEVE, Conch. Icon., pi .82, f. 609 (1849). 

 PFR., Conchyl. Cab., p. 103, pi. 33, f. 13-16 ; Monogr., iii, p. 407 ; 

 viii, p. 145. HIDALGO, Journ., de Conch., 1870, p. 59. Thaumas- 

 tus caliginosus COUSIN, Bull. Soc. Zool. Fr., xii, 1887, p. 223. Bu- 

 limulus (Scutalus*) caliginosus MARTENS, Conch. Mittheil., pp. 161, 

 204 (dentition). 



Specimens collected by Stu'bel at Cerro del Altar are yellowish- 

 brown, streaked, 38 mill, long, 19 broad, aperture 19 mill. high. 

 Those from Pitana are somewhat wider, dark-purple, the suture 

 and base yellowish, 31 mill, long, 17 wide, aperture 16 mill. high. 

 (Martens'). 

 B. COUSINI (Jousseaume). PI. 5, fig. 61. 



Shell imperforate, ovate-conic, rather solid, very delicately striated, 



brown, somewhat shining ; spire conic ; whorls 6, slightly convex, 



the last ventricose, one-half the length of the shell. Aperture sub- 



3 



UNIVERSITY 1 



