240 Illinois State Lahoratonj of Natural Histonj. 

 Aromoohelys, Gray. 



Gray, Cat. Shield Kept., 1855, p. 46. 



Carapace convex, smooth or keeled. Plastron small, nar- 

 row, rounded before, emarginate behind; bridges formed of the 

 narrow wings of the abdominal and the contiguous axillary 

 and inguinal of each side. Digits 5-4, fully webbed. Head of 

 moderate size. 



No stripes on sides of head. Plates of carapace with black 

 margins and radiating pale stripes A. carinatus. 



Sides of head striped. Plates of carapace uniform in color. 



A. odoratus. 



Aromochelys carinatus, Gray. Little Mud Turtle. 



Aromoohelys carinatus, Gray, Cat. Shield Kept. Brit. Mus., 1855, 



p. 47. 

 02otheca tristi/cha, Agassiz, Contr. Nat. Hist. U. S., 1857, p. 425; 



II., pi. 5, fig. 20-22. 

 Aromoclieljjs carinatus, Jordan, Man. Vert. N. U. S., 3d ed., 1880, 



p. 166.— Davis and Rice, Bull. 111. State Lab. Nat. Hist., I., 



No. 5, 1883, p. 53; Bull. Chicago Acad. Sci., 1883. 



Plates of the carapace imbricated, with black margins 

 and radiating pale stripes. No stripes on the sides of the 

 head. Otherwise similar to the following species. 



Lake county (Davis and Rice). 



This is a southern species which I have not taken in the 

 State. It is included here on the authority of Messrs. Davis 

 and Rice, who report it from Lake county. 



Aromochelys odoratus, Latreille. Musk Turtle. 



Testudo odorattt, Latr., Hist. Nal. Kept.. 1801, 1., p. 122.— Le C., 



Ann. Lye. Nat. Hist. N. Y., 1829, III., p. 122. 

 Cistudo odorata, Say, Jour. Acad. Nat. Sci. Phila., 1824, pp. 206, 



216. 

 Stnurotypus odoratus, Dum. et Bibr., Erp. Gen., 1835, II., p. 358. 

 Sternotharus odoratus, Ilolbr., N. A. Herp., 1842, I., p. 133, pi. 22. 



-De Kay, Nat. Hist. X. Y., I.. Zool. LIL, Reptiles and 



Araph., 1842, p. 22, pi. 7, fig. 13. 



