te NR rie 
VOL. III. JULY, 1889. No. 8. 
NOTE ON TWO HELICES NEW TO THE FAUNA OF THE UNITED STATES. 
BY W. H. DALL. 
(OME time since, among some shells from Southeastern Florida, 
received from Mr. G. W. Webster, two small Helices were 
noticed which a careful comparison with known U.S. forms failed to 
identify. By the kind intervention of Mr. H. A. Pilsbry, they 
were determined to be H. (Microconus) ewca Guppy, described from 
Trinidad, and H. (AL) granum Strebel, previously known from Mex- 
ico. This induced me to overhaul the small species in our collection 
to see if these forms had by any chance crept in under other names. 
The result was, that I found H. granuwm, which had hurriedly been 
referred to Guppyia Gundlachi, and H. ceca which had been left 
unnamed probably as the young of something else. 
The localities now known in Florida for the above species are as 
follows : 
Hf. ceca. St. Augustine. (C. H. Johnson.) Near St. John’s 
River and near Lake Worth in East Florida, and near the Hills- 
borough River, emptying into Tampa Bay, West Florida (Mr. G. 
W. Webster). Mr. Webster identified this species as H. diosoricola 
C. B. Adams, described from Jamaica, and it is very probable that 
it is at most a slightly larger variety of it, in which case Adams’ is 
the oldest name. 
H. granum. Archer, Alachua Co., Fla. (Dall.) ; Evans’ planta- 
tion, Rogers River (C. T. Simpson); vicinity of Lake Worth 
(G. W. Webster). When perfect this species is nearly the size of 
HT. labyrinthica, very thin, reddish-brown, with very deep sutures 
