20 THE NAUTILUS. 



of the river, as has happened in crates moored at Fairport, 

 Iowa, and at New Boston, 111. 



Fisheries Biological Station, Fairport, Iowa. 



FLORIDA WEST COAST LIGUUS. 



BY CHARLES TOBREY SIMPSON. 



In the April, 1921, number of the NAUTILUS, Mr. M. G. 

 Miller states that Capt. W. D. Collier, long a resident of Key 

 Marco, brought tree snails from Middle Cape Sable and 

 "planted" them at Caxambas, Goodland Point, and Marco, 

 all on Key Marco. This was done forty-eight years ago and 

 there were no Liguus snails on Marco previous to this, but 

 they multiplied and spread rapidly. 



As a matter of fact there have been found no less than four 

 subspecies of Liguus belonging to two species, and one species 

 of Oxystyla in the Marco region and for some forty miles 

 southeast of it. Liguus fasciatus roseatus has been found on 

 Marco Key, Horr's Island, near it, at Gomez Old Place, ten 

 miles southeast, at Caxambas, and at Chokoloskee farther 

 down the coast. The form of Liguus which I have called 

 lineolatus has been found at several places on Marco Key, 

 Horr's Island, Gomez Old Place, Russell's Key, Turner's 

 River, Caxambas and Chokoloskee. Liguus fascia-tits castaneo- 

 zonatus has been found at Rabbit Key, just below Choko- 

 loskee, and on the island of the latter name, but nowhere to 

 the northwest of these places, so far as I know. Liguus cre- 

 natus marmoratus, the "black snail", was obtained by Mr. 

 Clarence B. Moore, who got it from a Mr. C. G. McKinney 

 from land which he cleared somewhere near Chokoloskee, ac- 

 cording to Pilsbry in his "Study of the Liguus of Florida," 

 page 453. Some five years ago I visited Chokoloskee and was 

 taken by a resident to the island where he said the black 

 snails which Mr. Moore obtained were found. The hammock 

 had been cleared but diligent search brought to light some 

 fragments and three dead, badly-faded specimens, one of 

 which is marmoratus, I believe. Oxystyla floridensis has been 



