AMPHIBIANS. 61 



year and may be delayed until the third if the environment is un- 

 favorable. This species is of ,<>reat economic importance because of 

 its value as food, the legs being considered a great delicacy by 

 many people. The frog may be caught in the day time on a hook 

 and line baited with a bit of red flannel. They are frequently 

 hunted at night with lanterns, the light blinding them so that they 

 may be easily' sj)eared by the hunter. 



Distrihution: East of the Kocky ^Toun tains, including Florida 

 and Texas. (Dickerson, lOOG.) 



Michigan: Specimens in the University ^luseuni from Che])oygan, 

 Iosco, Huron, Livingston, Washtenaw and Cass Counties. Reported 

 from Eaton County (Clark, 1902) ; Eaton, Kalamazoo, Van Buren, 

 Antrim, Montcalm, Kent, Ottawa, Barry and St. Joseph Counties 

 (Gibbs, Notesteiu and Clark, 1905) ; *Ontonagon County (Ruthven, 

 1904a) ; Cheboygan County (Ruthven, 1911) ; Huron County (Ruth- 

 ven, 1911a) ; Washtenaw County (Smith, 1879) ; Cass County 

 (Thompson, 1911). 



GLOSSARY. 



Angle of the jaw. — Point of articulation of the two jaws. 



Anus. — External opening of the intestine. 



Branchiae.^ — External branched gills. 



Caudal fin.— The tail fin. 



Compressed. — Flattened from side to side. 



Costal grooves. — Grooves on the sides of the body, indicaling the 

 position of the ribs. 



Cranial crests. — Bony ridges extending back between the e^'es. 



Depressed.^ — ^Flattened from above downward. 



Disks. — The enlarged and adhesive pads on the ends of the 

 fingers and toes. 



Dorsal groove. — A depression along the back. 



Femur. — ^The upper or jjroximal bone of the leg. 



Fronto-parietal crests. — Crests in front of, and between the eyes. 



Genital openings. — External openings of the genital ducts. 



Gills. — Organs for breathing the air contained in water. 



Glandular. — Swollen and gland like. 



Gular fold. — A transverse fold of skin across the throat. 



Hibernate. — To refrain from an active condition, to remain in a 

 torpid state over winter. 



*Rana catesbeana has been reported from Ontonagon County by Ruthven (190ia) 

 but the specimens were later identified by Stejneger as somewhat anomalous specimens of 

 Rana clamitans (Ruthven, 1906). 



