138 OHIO STATE ACADEMY OP SCIENCE. 



Crotalus horridus L. Above yellowish, with three rows of dark brown 

 spots, irregular in shape and somewhat confluent. A light line from angle 

 of mouth to eye, subtended by a black blotch. Tail darker. Below yellow- 

 ish to dark grey. Scales 25, sometimes 23. Length 3 feet. 



This species is found only in rocky portions of the State. 

 They are now nearly exterminated, but a few remain in certain 

 localities. Thus, among the hills in the Scioto Valley from the 

 line of glacial drift southward, they are met with in small num- 

 bers. In the south-eastern portion of the State they are perhaps 

 more frequently taken than elsewhere. On Mouse Island, off 

 Catawba Point, in L,ake Erie, there is a small colon}' that grows 

 smaller every year. 



It is the most dangerous of our poisonous reptiles, both 

 because of the venom being very efficient and because of the 

 strength and size of the animal. The fangs are long, reaching 

 even an inch in length. The musculature is powerful. 



The food of this reptile consists of small rodents, birds, frogs, 

 etc. It is sluggish in its habits and will not strike unless pro- 

 voked unduly. Its stroke reaches about two feet. 



The writer has seen specimens taken in some of the places 

 mentioned, but there are but few specimens in museums to sub- 

 stantiate its being included here. 



One specimen in the zoological collection of the Sandusky High School 

 has a definite record. 



Order: TESTUDINATA. 



This order includes the turtles, and concludes the list of 

 Reptiles. No general work on the order is extant and the nomen- 

 clature adopted is that given by Jordan ('99), which is that of 

 Dr. Leonard Stejueger of the U. S. N. M. 



Family : Trionychidae. 



*Arnyda mutica (Le Sueur). Median line of back depressed. No 

 tubercles. Nostrils not terminal, but rather placed below the end of the 

 snout. Not recorded for Ohio. 



Aspidonectes spinifer (Le Sueur). Above flesh color to clay color, 

 covered with black spots. Head and neck striped. Ground color greenish. 

 Feet spotted. Nostrils at tip of snout. Length 1% feet. Feet broadly 

 webbed. Bod)' very flat. 



