PLATE 81. 
1 . 707. 1 . Megalomus canadensis. (Pag. 343.) 
1 a. Cast of a large individual, presenting the ordinary characters of specimens when not distorted. 
1 b. A cast of a much shorter specimen : probably the form is in part due to pressure on the posterior end. 
1 c. View of the anterior extremity of the specimen 1 b. 
1 d. Dorsal view of the same. 
1 e. A cast of a specimen somewhat distorted by pressure, which has projected the lower anterior end beyond 
the beaks above. 
1 /. View of the anterior end of the specimen fig. 1 e. 
