34 BULIMULUS-3CUTALUS. 



oval, livid and shining within ; peristome whitish-rose, simple ; the 

 margins joined by a callus, right margin slightly thickened, colu- 

 mellar margin dilated. Alt. 41, diam. 23 mill. ; aperture 24 mill. 



long, 13 wide. (Jouss.). 



Concha, Ecuador (Cousin). 



RJiabdotus cousini Jouss., Bull. Soc. Zool. France, xii, p. 167, pi. 

 3, f. 18 (1887). 



B. IRREGULARIS (Pfeiffer). PI. 5, fig. 71. 



Shell umbilicated, ovate-oblong, rather solid, roughened by close 

 longitudinal folds ; flesh colored, somewhat streaked with brownish ; 

 spire conic, rather acute, the apex reddish. Whorls 6, slightly con- 

 vex, the last slightly shorter than the spire, subangularly com- 

 pressed around the narrow, impervious umbilicus. Columella 

 lightly arcuate. Aperture elliptical, subangular at the base; peri- 

 stome simple, unexpanded, the columellar margin reflexed at base 

 and dilated above. Alt. 19, diam. 9 mill. ; aperture 10 mill. long. 



Quito, Ecuador (de Lattre) ; Imbabura, Tumbaco, Mt. St. An- 

 tonio, Calacali, hill of Guallabumbo near Turu, and Riobamba 

 (Cousin) ; Salinas Ibarre, Prov. Imbabura, 1659 meters alt. (Stiibel). 



Bulimus irregularis PFR., P. Z. S., 1847, p. 231 ; Monogr., ii, p. 

 183. REEVE, Conch. Icon., pi. 65, f. 454. Bulimulus (Scutalus') 

 irregularis (including B. catlowce) MARTENS, Conch. Mittheil., p. 

 162. Scutalus irregularis MILLER, Malak, Bl., xxv, 1878, p. 194. 

 Thaumastus irregularis COUSIN, Bull. Soc. Zool. France, 1887, p. 

 225. 



This form is somewhat more slender than B. catlowice, with smaller 

 umbilicus, but does not seem to present any other differences. Von 

 Martens unites them. 



The shells recorded by Hidalgo in Journ. de Conch., 1870, p. 63, 

 as B. irregularis, from Ibarra and Otavalo, Ecuador, were after- 

 ward decided by him to be B. quitensis Pfr. ; but irregularis and 

 catlowice are apparently not specifically separable from the prior B. 

 quitensis. 



VAR. CATLOWMS (Pfeiffer). PI. 5, figs. 67, 68, 69, 70. 



Shell narrowly umbilicate, oblong, ovate or conic, rather thin ; 

 closely and irregularly wrinkle-striate, lacking spiral strise. Vary- 

 ing from flesh-colored to dark purplish-brown, with lighter lines 

 and streaks. Spire conic, the apex rather small, ruddy or pale, 



