398 



TERRESTRIAL AIR-BREATHING MOLLUSKS. 



Genitalia (PI. XV. Fig. J) without accessory organs. The penis sac is long, 

 cylindrical, tapering into a flagellum above, and receiving the vas deferens 

 near its lower termination. 



The genital bladder is ovate on a long duct. 



Fig;. 281. 



Bulimulus 

 Marielinus. 



Bulimulus Marielinus, POEY. 



Shell imperforate, ovate-conic, thin, very minutely substriate, somewhat shin- 

 ing, pellucid, white, varied above the middle by numerous sub- 

 interrupted, reddish-chestnut bands ; spire conic, somewhat acute ; 

 whorls 5, scarcely convex, the last about equalling the spire, sub- 

 attenuated at base; aperture scarcely oblique, subelliptical, nar- 

 rowed at base ; peristome simple, straight, its columellar termina- 

 tion subreflected above, appressed. Length 16, diameter 8 mill.; 

 of aperture, length 9, breadth in its centre 5 mill. 



Bulimus Marielinus, POEY, Memorias, I. 212, 447 ; II. PI. XII. 

 Figs. 32, 33 (young). PFEIFFER, Mon. Hel. Viv., III. 407.- 

 W. G. BINNEY, L. & Fr.-W. Sh., I. 193 (1869). 



Bidimus (Leptomcrus) Marielinus, TRYON, Am. Journ. Conch., III. 174 (1867). 



A Cuban species, specimens of which were found by Dr. J. G. Cooper in 

 the Florida Subregion in Southern Florida; one of them is drawn in Fig. 281. 

 I have also received it from near the Miami Kiver. 



The shell is very thin. It may readily be distinguished from B. Dormant. 

 It is more cylindrical in outline, its bands of color are revolving, not longitu- 

 dinal. 



Jaw short, broad, strongly arched above, moderately so below ; ends attenu- 

 ated, blunt; anterior surface with coarse longitudinal striae, and with rib-like 

 processes, scarcely elevated, but denticulating the cutting edge. 



Lingual membrane not observed. 



Genitalia not observed. 



Bulimulus Floridanus, PFEIFFER. 



Shell narrowly perforated, ovate-elongate, rather smooth, grayish-green, vari- 

 egated with white opaque streaks and spots ; spire elon- 

 gate-conic, somewhat acute ; whorls 6|, rather convex, 

 the upper ones banded with interrupted brown, the last 

 about three sevenths the length of the shell, subangulated 

 below the middle, attenuated at the base ; columella 

 somewhat twisted, receding; aperture slightly oblique, 

 oval ; peristome thin, its right termination narrowly ex- 

 panded, the columellar termination dilated, reflected, 

 hardly touching the shell. Length 15f-17, diameter 

 7^ mill. ; length of aperture 7, diameter 4^ mill. 



Bulimus Floridanus, PFEIFFEH, Proc. Zob'l. Soc., 1856, 330 ; Mon. Hel. Viv., 



Fig. 282. 



B Floridanus. 



