49 



species described. All our species come under Prof. Cope's suborders 

 Areifera and Firmisternia. Of the first, we have representatives of two 

 families; of the second, one family. 



Key to the Families of Salientia. 



A. Clavicles"'^ and coracoids of each side connected by an arched car- 

 tilage ; that of the one side overlapping that of the other. 

 (Areifera.) 

 a. Upper jaw without teeth ; digits without disks. 



BufonidcB, p. 49- 

 aa. Upper jaw furnished with teeth. 



b. Form frog-like ; toes and fingers with disks. 



Hylidw, p. 52,. 



bb. Form toad-like ; digits without disks. Seaphiopodidce^ 



AA. Clavicles and coracoids of the one side firmly connected with those 



of the other side by means of a narrow median cartilage, 



(Firmisternia.) 



a. Upper jaw with teeth. Ranidce, p. 64- 



aa. No teeth on upper jaw. > Engystomatidce;^ 



Family VII. BUFONID^. 



Both upper and lower jaws destitute of teeth. Vomerine teeth usually 

 absent. The diapophysis of the sacral vertebrae more or less expanded. 

 Vertebrae proccelous. Ribs none. 



A widely distributed family, containing, according to Cope, fourteen 

 genera, of which we possess only one, Bufo. 



Certain characters are very commonly possessed by the Bufonidce. 

 Among these are a heavy squat form, short limbs, a rough, warty skin,, 

 and a collection of integumentary glands lying behinh the head,, and 

 known as the paratoids. 



GENUS BUFO, Laurenti. 



Laurenti, 1768, 109, 25; Boulenger, 1882, 27, 281; Cope, 1889, 5^ 

 260. 



No vomerine teeth. Tympanum distinct or hidden. Toes webbed ; 

 fingers free. Sacral diapophysis more or less dilated. Outer metatarsals 

 united. 



"Tn order to understand the arrangements of the shoulder girdle on which the division 

 of the Salientia into Areifera and Firmisternia is based, the student ought to dissect this por- 

 tion of the common Toad, as a representative of the Areifera, and the same portion of the 

 Leopard Frog, as an example of the Firym'sternia. The accompanying figures, 7 and 8, pi. 2^ 

 will assist. 



