CYLIXDRELLA. 



23 



Florida and Cuba. 



The description in the Terrestrial Mollusks is drawn from the 

 lactaria, Gould, which is identical with variegata, Pfr., and is 

 characterized by flexuose milk-white lines and more delicate striae. 



Cat. No. No. of Sp. 



Locality. 



Florida. 



From whom received. 



W. G. BiBui-y. 



Remarks. 



Cylindrella jejlina, Gould.— Shell rather small, fusiform, trun- 

 cated at apex, quite solid, of a pale horn-color, longitudinally striped with 

 delicate, white lines ; spire composed of about nine 

 whirls, though when entire the whole number would be Fig. 16. 



about twice as many; they are convex, and separated 

 by a well-marked suture ; the last whirl has a delicate 

 carina, and extends in a short neck ; the aperture is 

 bell-shaped, the peristome white, continuous, and not in 

 contact with the preceding whirl. Axis simple. Length 

 10, breadth about 2\ mill. 



Cylindrella jejuna, Gocld, Proc. Bost. Soc. Nat. Hist. CylindreUaj^wna, 

 III, 41, June, 1848 ; Terr. Moll. II, 310, pi. Ixix, f. 

 3._W. G. BiNNEY, T. M. IV, 150. 



Cylindrella variegata, Pfeiffer, part, Mal. Blatt. II, 13. 



Found abundantly in Florida. 



Fi^. 17. 



Cylindrella irregularis, Gabb. — Shell about an inch long, 

 slender; spire irregularly tapering, the first three whirls being of the same 

 diameter, the next five to seven whirls increasing steadily, 

 after which the remainder are nearly of the same diameter ; 

 apex not always exactly in the apex of the shell ; whirls 

 sixteen to eighteen, rounded on the side, body-whirl slightly 

 subangulated below ; suture impressed ; umbilicus minutely 

 perforate, and bordered by a slight angle ; aperture irregular 

 in outline, angulated internally, above and below ; outer lip 

 but slightly expanded ; inner lip curved internally, and 

 expanded so as to hide the umbilical region in part, most 

 expanded in the middle, and in some specimens distinctly 

 subangulated at this point. Surface sculptured by small longitudinal, 

 slightly arched ribs ; color light horn brown. (Gahb.) 



Cylindrella irregularis, Gabb, Am. Journ. Conch. Ill, 238, pi. xvi, f. 4 

 (1867> 



Cylindrella 

 irregularis. 



