44 THE NAUTILUS. 



Family CYCLOSTOMATin^E. 



Chondropoma dentation (Say). Miami; pine woods under flat 

 rocks ; very abundant. 



Family Tiu ncatellid^e. 



TruncateUa caribceensis " Sowb.," Rve. Miami. Found sparingly 

 and only beneath the wet drift. Far above high- water mark on the 

 bay side. Not found in similar positions in the tide-water limits of 

 the Miami River, brackish water not seeming to agree with it. 



TruncateUa bilabiata Pfr. Miami. Abundant. The above notes 

 on caribceensis are equally applicable to this associated species, which 

 is easily distinguishable by its smaller size and dark coloration. It 

 is ten times as numerous as the preceding. 



Family Helictnid^e. 

 Helicina orbicidata Say. Miami and Lemon City. Abounding ; 

 especially in dense hammock at the bases of trees well under the 

 vegetable mold in the winter season. 



Family Helicid.e. 



Cepolis varians (Mke.). Virginia Key. The remarks given 

 under Cerion incanum equally apply to this shell. They are only 

 found alive on " Hammock Keys." Virginia Key is too low for 

 hammock growths. 



Polygyra cereohis (Muhlf.). Virginia Key. A single bleached 

 specimen taken on the beach. 



Polygyra cereolus carpenteriana (Bid.). Miami and Virginia 

 Key. Abundant and of universal distribution in all kinds of situa- 

 tions except muckland. The most abundant land snail of South 

 Florida. 



Polygyra septemvolva Say. Miami and Lemon City. The open 

 muckland and wet prairie species, distinguished by large size, flat- 

 ness and angularity. It is rare in the districts named. 



Polygyra uvidifera (Shuttl.). Miami and Lemon City. Asso- 

 ciated with Chondropoma under flat stones in pine woods in the pro- 

 portion of one to ten of the latter. Rare in the wet lands. 



Polygyra avara Say. Miami. Rare; only two specimens taken. 



Polygyra pnstula (Fer.). Miami. Another rare and strangely 

 local species: found under decaying vegetation on the ground beneath 

 oak hammock. Not taken in the pine woods. 



