Occasional Papers of the Museum of Zoology 37 



A. Shell with irregular granulations; last whorl whitish with dark, 



chestnut-brown, spiral band. Ecuador. 18; 139(25); 5^ 



Cyclotus granulatus Pfr. (1862). 



AA. Shell with comparatively regular, impressed lines, which cross the 

 growth lines obliquely in two series, so as to mark off rugae or 

 diamond-shaped corrugations ; without definite color bands. 



B. Large species : granulations arranged in quincunx ; apex light 

 brown ; lower whorls darker ; unevenly black-striped. Ale- 



jandria, Colombia (L 6, 76). 30; I32(39-.S) ; 5 



Neocyclotus peilei Gude (1912). 



BB. Smaller species ; more depressed. 



C. Shells medium in size ; plicae and striae comparatively reg- 

 ular and covering practically all of last whorl. 



D. Very prominent and quite regular striae meet the suture 

 at an acute angle, while the short, curved series, that 

 cross the first at approximately right angles, are pres- 

 ent only near the suture; color yellowish; interior of 

 aperture only slightly iridescent. Merida, Venezuela 



(L 8, 71). 15.7; 142(22.3); 4!/^ 



Cyclostoma stramincum Reeve (1843). 



DD. Both series of striae comparatively weak, but almost 

 equally prominent ; color olive-brown to castaneous, 

 lighter below ; interior of aperture with bluish to pur- 

 plish iridescence. 



E. Smaller ; color castaneous. Venezuela. 12.8 ; 142 

 (18.2) ; 4.i*)CyclostoinagIaucostomuin Pfr. (1855). 



EE. Larger ; color olive-brown. Quebrada Seca, Vene- 

 zuela. 14.6; 154(22.6); 4^ 



( !) P. glaucostoma aulari, new subspecies. 



CC. Shells smallest; both sets of striae irregular, and obscure 

 or absent on lower side of last whorl. 



F. "Obscure retuse corrugati"; golden unicolor. Chiriqui, 



Panama. 10; 150(15); 4V2 



Neocyclotus panamcnsis DaCosta (1904). 



FF. Sutural side of last whorl with irregular, but promi- 

 nent, striations and rugae ; umbilical side obscurely 

 granulate or without oblique striations ; color yellow- 

 ish. Northern Hills of Trinidad. (Other similar 

 forms in Lesser Antilles ; compare Cyclostoma grana- 



dense Shuttleworth, 1857). Maj. diani. 17.8 



Cyclotus rugatus Guppy ( 1864) . 



