24 



BULLETIN 160, UNITED STATES NATIONAL MUSEUM 

 Scaphiopus hammondii multiplicatus — Continued 



' Type of Scaphiopus multiplicatus. 



Cotypes of Scaphiopus dugesii. 



Family RHINOPHRYNIDAE Gunther 



1858. Rhinophrjnudae Gunther, Catalogue of the Batrachia Salientia in the 

 collection of the British Museum, p. 127. 



A single genus, Rhinophrynus, is the sole known representative of 

 Rhinophrynidae. The precise relationships of this family are some- 

 what uncertain, and, although it is to be referred to the suborder 

 Procoela, it occupies a somewhat anomalous position on account of 

 the presence of a peculiarly modified pectoral girdle. Among the 

 arciferal amphibians the clavicles and coracoids extend toward the 

 middle line to join the corresponding epicoracoid cartilaginous plate. 

 The two halves of the pectoral girdle thus overlap on the mid-line. 

 In Rhinophrynus, however, both halves of the pectoral girdle are 

 attached to a single curved epicoracoid cartilage. The under epico- 

 racoid seems to have been lost. Bomhinator and Ceratophrys have 

 somewhat similarly shaped coracoids and clavicles, but both of these 

 genera have overlapping curved epicoracoid cartilages. 



The life history and developmental peculiarities of the eggs and 

 tadpoles of this toad are unknown. 



Genus RHINOPHRYNUS Dumeril and Bibron 



1841. Rhinophrynus Dumeril and Bibron, Erp^tologie g6n<§rale, vol. 8, p. 757. 

 [Genotype, Rhinophrynus dorsalis Dum6ril and Bibron, z'dem, vol. 8, p. 758, 

 pi. 91, figs. 2, 2a (Vera Cruz, Mexico).] 



