382 LAKE SUPERIOR. 



The lobes of the rattle have the same dimensions as those of C. 

 tergeminus. The whole length of the body is two feet two inches ; 

 the head measures one inch and a quarter ; the tail, three inches 

 and five-eighths of an inch. There are other slight differences in 

 the proportional length of the body and of the tail, corresponding 

 to the differences noticed in the greater number of caudal plates 

 and the greater width of the abdominal plates. 



The specimen was caught on the southern extremity of Lake Huron. 

 Besides those species, the following reptiles occur about Lake 

 Superior : 



Tropidonotus sirtalis, 



" erythrogaster, 



" a species allied to rigidus, from Lake Huron, 



Bufo Americanus, 

 Rana halecina, 

 " sylvatica. 



These three species occur as far north as Neepigon Bay, and a 

 circumstance, which has struck me very forcibly, is the remarkable 

 size of the specimens observed in these high latitudes. 



Plethodon erythronotus Bd. 



Menobranclius maculatus. This species does not properly occur in Lake 

 Superior, but is found in Muddy Lake, below Sault St. Marie. 



No turtles are found any where on the northern shores of Lake 

 Superior, as far as I know. 



