20 NEW-YORK FAUNA. 



I have never met with this species in this State, but am assured by Major Le Conte that he 

 has seen it in Lake Erie, from which it is reasonable to suppose that it occurs in this State. 

 The specimen affording the above description, was one sent to the Lyceum by Mr. Schoolcraft, 

 from the Sault St. Marie, several years ago. 



(EXTRA-LIMITAL.) 



E. Jloridana. (Holbrook, Vol. 2, p. 47, pi. 8; and Vol. 1, pi. 8 of 2d Ed) Shell gibbous, entire, 

 ecarinate, very large, roughened longitudinally. Brown, with numerous dashes of dusky. Length 

 of shell 15 inches. Florida. 



E. reticulata. (Holbrook, Vol. 2, pi. 7; and Vol. 1, pi. 7 of 2d Ed.) Gibbous, ecarinate, entire, 

 rugose longitudinally. Dark brown yellow lines, and a dorsal yellow line ; neck very long ; feet 

 striped with yellow. Length of shell 9 inches. Carolina, Georgia. 



E. serrata. (Id. Vol. 2, pi. 5; and Vol. 1, pi. 7 of 2d Ed.) Gibbous, carinate, almost round, longi- 

 tudinally rugose. Dusky, with irregular yellowish lines ; a large yellow spot on the cheek. The 

 five posterior marginal plates deeply serrate behind. Length 12 inches. Virginia, Georgia. 



E. concinna. (Id. Vol. 1, pi. 19.) Smooth, ecarinate, emarginate behind. Dusky brown, with con- 

 fluent yellow spots and lines, more or less reticulated ; legs and neck striped with yellow ; a bi- 

 furcate stripe on the sides of the head. Length 8 inches. Georgia, Carolina. 



E. mobilensis. (Id. Vol. 2, pi. 9; and Vol. 1, pi. 9 of 2d Ed.) Large, oval, convex and entire in front, 

 emarginate and sub-serrate behind. Jaws serrate ; inferior with a hook. Brown, with largely 

 reticulated yellow lines. Shell 15 inches. Alabama. 



E. oregonensis. (Harlan, Am. Jour. Vol. 31, pi. 31. Holbrook, Vol. 1, pi. 16.) Shell ecarinate, 

 olive, with irregular bright yellow lines margined with black ; anterior marginal plates serrated in 

 front. Length 8 inches. Columbia River. 



E. hieroglyphica. (Holbrook, Vol. 1, pi. 2; pi. 17 of Ed. 2.) Shell ecarinate, smooth, elongate 

 and imperfectly serrate behind. Sternum emarginate behind. Upper jaw slightly notched ; lower 

 with a tooth. Shell dusky, with broad sub-concentric yellow lines. Claws very long. Length 

 12 inches. Tennessee. 



E. megacephala. (Id. Vol. 1, pi. 3.) Shell carinate, serrate and acute behind. Sternum oblong, 

 emarginate. Head very large ; jaws entire. Shell dark olive green ; sternum dingy yellow ; head 

 and neck with greenish yellow stripes. Length 8 inches. Tennessee, Ohio. 



E. troosti. (Id. Vol. 1, pi. 4; Vol. 1, pi. 20 of Ed. 2.) Shell depressed, ecarinate, slightly serrate 

 behind. Head long and narrow. Upper jaw notched ; lower jaw with a toothlike process. Shell 

 dark green ; sternum yellow, with a large black blotch near the centre of each plate. Length 8 

 inches. Tennessee. 



E. cumberlandensis. (Id. Vol. 1, pi. 18.) Head moderate; upper jaw slightly emarginate; lower with 

 a small hook in front. Shell rather rounded, indistinctly carinate, slightly notched in front, and 

 serrated behind Shell brown, with radiating yellow lines. Length of shell 8 inches. Tennessee. 



