18S5.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 261 



are absolutely no mollusks in the pine woods or away from water or 

 moist earth. The clumps of hardwood around the "sinks" or natural 

 wells of the region, called there " oak hamaks," are usually well popu- 

 lated with snails, thou^^h tliere may be only minute ones; but a few 

 steps away among the pines the most ardent collector will find nothing. 

 In the "sinks" Piawor/^ii- tnvolvis and Fhysa lieterostroplia are always 

 to be found, but nothing else, at least in any of those I visited. Those 

 sinks in which the water stands near the level of the soil may have 

 more moUusk inhabitants. On the moist soil around the sinks the Poly- 

 gyrse of the auriculata type tiud congenial surroundings. The cereolus 

 type of Polyfiyra seems to prefer the shores of lakes or beaches near the 

 sea, in general warmer spots than the others. The smaller forms, Pu- 

 pilla, Vertigo, Zonites, Strobila, &c., are best found by carefully scanning 

 the inner surface of loose bark on some prostrate hardwood tree, and 

 that of the wood opposite. Here these small folk live and enjoy life 

 after their fashion, tiuding coolness, moisture, and the mycelium on 

 which thi y chiefly feed. By rolling over the log when the bark has 

 been thoroughly- scanned, some of the larger forms (as well as a snake 

 or two) will probably be found. By gathering a large bagful of the 

 moist dead leaves from near the hardwood trees, drying them and shak- 

 ing them a handful at a time in a large paper bag, in the dusu and de- 

 bris which will accumulate in the bottom of said bag, the collector will 

 usually find his reward. 



The present species does not appear to have been recorded from Flor- 

 ida, though known from Northern Georgia and Mississippi. 

 Pupilla fallax Say. 



Piqmfallax Say (1B21), Binn. Terr. Pulm. of the U. S., v, p. 202, 1878. 



Egmout Key, Fla., Col. E. Jewett. 

 Pupilla contracta Say. 



Fupa contracta Say (1822), Binney, 1. e., p. 207. 



Habitat. — Eastern United States, Binney ; Archer, Alachua County, 

 Florida, Dall, in oak hamaks, under bark, April, 1885 ; Tampa, 

 Stearns and Jewett; Samana Bay, Dominica, officers of the United 

 States Kavy. 

 Pupilla rupicola Say. 



Pupa rupicola Say (1821), Biuu.,1. c, p. 208. 



Abundant at Tampa, Stearns and Hemphill; Key West, Binney; 

 Enterprise, Lake Monroe, Dall. 



This species seems quite constant in its characters. 

 Pupilla floridana n. s. Plate 17, Fig. 11. 



Shell greenish spermaceti-white ; when living the tissues of the ani- 

 mal show with pale salmon color through the shell in the apical whorls ; 

 surface smooth or lightly striated, with a tendency to retain dirt upon 

 itself; form subcylindrical, with a rather obtuse apex, the last whorl 

 forming nearly half the shell; suture evident; whorls five, neatly 

 rounded; aperture longer than wide; lip white, thin reflected; teeth. 



