104 THE NAUTILUS. 



Cuban Mollusks Colonized in Florida. — Last April Mr. C. 

 T. Simpson sent me 10 fine Pleurodonte auricoma (F^r. ) and 2 P. 

 mnrginclla (Gmel.), one adult and one immature, which he had 

 collected in his " hammock " at Lemon City, Fla. The largest 

 auricoma measures 40 x 29 and the smallest 30 x 20 mm. The 

 adult marginella is 27 x IG mm., while the young shell would 

 probably have grown larger. 



As these species appear to be permanently established I 

 wrote for further information, and below give his response. — 

 " Little River, Fla., April 20, 1918. I have Pleurodonte auri- 

 coma living on the place but cannot give locality from whence 

 taken. It has become completely established and every year I 

 find hundreds of living and dead examples scattered throughout 

 my cultivated pine land, but never in the hammock. I find 

 most of the living specimens when hoeing, buried just under 

 the surface of the sandy soil, sometimes in dry weather with a 

 sort of epiphragm. The other day I found a perfect var. pro- 

 visoria in fine condition. I do not remember whence it came. 



"Two varieties of Liguus fasciatus, which were derived from 

 the general Camaguay to Holguin (Cuba) region, seem to be 

 established here. The ground color of one is a warm slate and 

 the other has some j'ellowish on it. I have found two speci- 

 mens lately in fairly fresh condition and as it has been about 

 four years since any were brought in I am sure they haVe grown 

 here, especially as one was not fully grown. 



'^ Polymita muscnrum, white var. with dark dots, is occasion- 

 ally seen and the dead shells are rarely found. J. B. Hender- 

 son sent the parents of these and they are from some part of 

 Eastern Cuba. Our specimens are large, solid and fine. 



" Pleurodonte marginella seems to be prettj'^ well established in 

 my hammock, probably from Cayo del Rey, and there are 

 several variations. Most are bluntly keeled and rather dark 

 colored. They keep strictly in the hammock and tho not yet 

 numerous they seem to be spreading and slowly increasing. 

 They remain under trash and the fallen leaves of palms during 

 most of the dry season, but have just begun to appear since we 

 had a heavy shower yesterday. They climb palms and live 



