THE NAUTILUS. 4] 
brilliant and copper-colored, very iridescent and remarkably corus- 
cated ; the upper third being stained darker. Lateral teeth equal, 
long, slender, slightly curved and extending fully to the cardinals. 
Cardinal teeth inclined to be double in both valves, compressed, ob- 
lique and serrulate. Cicatrices well impressed, showing the pris- 
matic layers, the anterior ones being roughened in the posterior 
portion and widely distinct, and the posterior ones confluent. Pal- 
lial lines obscure. Dorsal notch long and shallow. Width 3 inches, 
length 1.5 inches, diameter 1 inch. 
Habitat—An unnamed lake in Witthacoochee River region of 
Hernando Co., Florida. 
Type in National Museum. 
Remarks.—It is difficult to assign a place to this shell, partaking 
as it does of the features of several members of the Buckleyi group. 
It has the subtruncate anterior of U. coruscus Gould, and approaches 
that species in nacre, which in our shell is of a deeper and richer 
tint, and is not so pointed behind, is more inflated, straighter dor- 
sum, lighter teeth, more rayed and has a red instead of a blacki-h 
epidermis, and attains a much greater size. From U. Hinkleyi B. 
H. W., it differs in the abrupt anterior, sides more rounded, darker 
nacre, and in the reddish, instead of black epidermis. It is in every 
way more gracile than U. Buck/eyi Lea, and is not so pointed be- 
hind. Nor has it the ponderous umbos, arched dorsum and rounded 
base of that species. 
Sixty specimens of all ages have been observed, showing a re- 
markably perfect uniformity of characters. It is named for the 
discoverer, Mr. George Pine, of Aripeka, Hernando Co., Florida. 
(To be Continued.) 
MELANIA YOKOHAMENSIS, N. SP. 
BY W. D. HARTMAN. 
Shell elongate, conic, gradually tapering to an acute apex. 
Whorls 7, suture lightly impressed ; surface smooth, with obscure 
spiral lines, color yellowish-green; aperture white, opercle brown, 
oval and corneous. Length 35 mill., width 13 mill.; width of 
aperture 6 mill., length of aperture 10 mill. 
Locality —Yokohama, Japan, B. Schmacker collector. 
