140 OHIO STATE ACADEMY OF SCIENCE. 



The strong musky odor which gives it its specific name is a 

 ready means for telling it from its brethren. 



Specimens in the O. S. U. Mus., from Sandusky, and from Georgesville, 

 collected by the author. 



*Pseudemys hieroglyphica (Holb.). Shell flattened, without corru- 

 gations. Plastron yellow. Head and neck ornamented with yellow streaks. 

 Upper jaw hooked. Not taken as yet in Ohio. It ranges from New York 

 to Wisconsin and southerly. . 



Family : KMYDIDAE. 



Graptemys geographicus (Le Sueur). Yellowish brown, with green- 

 ish and yellow lines forming a reticulation over the carapace. Below yellow- 

 ish. Carapace denticulate behind, flattened, porterior edges flaring. Toes 

 short. Length i% feet. 



An aquatic turtle, leaving the water only to deposit its eggs, 

 Its food is largely clams and gasteropods. 



In Ohio it is common in the larger rivers flowing into Lake 

 Erie and the Ohio River. 



Specimens in the O. S. U. Mus., from Sandusky, Toledo, Rockport and 

 Cincinnati, collected by W. H. Smith. 



Chrysemys marginata (Agassiz). Plates of carapace alternating, 

 never in transverse rows of threes. Above black with a metallic cast, each 

 plate edged with yellowish. Marginal plates with red markings. Plastron 

 yellow, generally blotched with dark brown, Lateral plates sculptured. 



This is at once our commonest and most conspicuous turtle, 

 and is too familiar to need any consideration of its habits. Its 

 food consists of mollusks, worms, insects and is indeed omnivor- 

 ous in its habits. Its eggs are laid in sandy places, a short dist- 

 ance from the water. The young hatch about June 2oth or later, 

 according to the latitude and temperature. 



Specimens in the O. S. U. Mus., from Columbus, and from Newton Falls, 

 Vinton and Sandusky by the author. 



* Chrysemys picta (Hermann). As above, but dorsal plates arranged 

 in sets of three, not alternating. 



This turtle is given by Smith ('82) as found in eastern Ohio, 

 and other writers follow him. However, careful collecting in 

 eastern Ohio has failed to reveal its presence. If it occurs it does 

 so sparingly. 



Clemmys guttatus (Sch.) Carapace black, covered with circular 

 orange spots about one-fourth inch in diameter. Plastron yellow, heavily 

 blotched with black. Length 5 inches. 



