. 
126 HYALINIA FULVA CHERSINA. 
and South, Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky 
Louisiana, Maine, Massachusetts, Michigan, Minnesota, Nebraska, New Hamp- 
shire, New York, Ohio, Pennsylvania, Rhode Island, Tennessee, Texas, Vermont, 
and Virginia. 
In its strictly typical form, Dr. Pilsbry informs me it is confined to Florida and 
the low country from North Carolina to Alabama, but is not found in the Southern 
Allegheny Mountains, nor on the southern extremity of Florida. 
Fic. 174.—Map illustrating the Geographical Distribution in the 
United States of Hyalinia fulva and its more striking forms, 
prepared by Dr. Pilsbry, and based on the Collections of the 
Academy of Natural Sciences, Philadelphia. 
i BZ SS 
° 
11. fulva. IT. chersina. var. polygyrata. var. trochula. var. dentata. 
Alabama—(H. A. Pilsbry). 
Georgia—The type specimens were described from the Sea Islands by Mr. Say 
(H. A. Pilsbry, Nautilus, 1899, p. 116). 
Florida—Volnsia county (H. A. Pilsbry, Nautilus, loc. cit.). 
North Carolina—Smoky Mountain (Walker and Pilsbry, Proe. Acad. Nat. Sci. 
Philad., 1902). 
South Carolina—(H. A. Pilsbry). 
Var. polygyrata Pilsbry. 
Conulus cherstnus polygyratus Pilsbry, Nautilus, Feb. 1899, p. 116. 
Described as of a deep brownish-amber colour, and as similar to sub-var. 
trochulus, but less elevated, with narrower aperture ; whorls over six, very narrow, 
the last bluntly but decidedly angular in front above the middle of the whorl, 
which causes a peculiar sloping below the periphery ; upper surface with a silky 
lustre; base glossy with a silky band around the outer margin. 
Diam. 3.mill., alt. 2°2 mill., but sometimes found even larger. 
Said to differ from typical chersinus and trochulus in the peculiar form of the 
base and the narrower and less transverse aperture, due to the high position of the 
peripheral keel. The more convex dome-shaped spire and more numerous whorls 
are very characteristic when once recognized. 
Dr. Pilsbry says this variety is very close to chersina, and when larger series 
are obtained from Illinois, South Indiana, West Kentucky, and Tennessee, it 
will probably intergrade in characters, and is almost sure to connect in geo- 
graphical range. 
It has been reported from :— 
Alabama—Where it has been collected by Mr. H. H. Smith (G. H. Clapp). 
Indiana—(H. A. Pilsbry). 
Illinois—Algonquin (G. H. Clapp). 
Iowa—Rutliven (G. H. Clapp). 
