DESCRIPTION OF A NEW GENUS AND SPECIES OF TAILLESS 

 BATRACHIAN FROM TROPICAL AMERICA. 



BY 



Leonhard Stejnegkr and Frederick C. Test. 

 (With Plate iii.) 



Tetraprion, g«^ii. nov* 



(rf r/JiTc, lour ; rrpihw, saw.) 



Of the family //j///V7rt' ; Pectoral arcli arciferous ; no ribs; no man- 

 dibular teeth; vertebra^ proco;le; sacral vertebra with dilated diapo- 

 physes and two condyles for articulation with the simple coccygeal 

 style; terminal phalanges claw-shai)ed. 



One long series of teeth on parasphenoid bone; vomerine teeth; a 

 series of teeth on the imJatines ; head rough, bony, the skin being involved 

 in the cranial ossification ; tympanum distinct; lingers and toes webbed, 

 the tips dilated into regular disks; outer metatarsals not bound 

 together (?); omosternum and sternum cartilaginous; pupil horizon- 

 tal?); tongue ? 



Type : Tetraprmi jonlani. 



Tetraprion jordani, sp. nov. 



Vomerine teeth in two well separated, nearly transverse groups situ- 

 ated ou a level with the posterior border of the choan;e, each group 

 consisting of about five rather large teeth ; a single, transverse, slightly 

 s curved series of closely set small teeth ou each palatine behiud the 

 choante ; teeth on parasphenoid small, closely set, forming a long, single 

 series; top of head bony, very rough, especially the ridges; canthus 

 rostralis forms a ])rominent sharp ridge; loreal region very concave; 

 interorbital space very wide and concave; a prominent bony sui)ratym- 

 panic ridge ; posterior border of ''helmet" nearly straight, slightly con- 

 cave in the middle; tympanum circular, its diameter four-sevenths of 

 diameter of orbit ; fingers one-third webbed, first nearly free, opposable ; 

 toes nearly one-half webbed; disks much smaller than tympanum ; tibio- 

 tarsal articulation reaches the tympanum ; skin above and on throat and 

 chest smooth; rest of under surface granulate. Color can not be made 

 out satisfactorily, but seems to be brownish above and uniform whitish 

 below. 



Length of head from mouth to posterior border of helmet, 21 milli- 

 metres ; length of head and body, 71 millimetres; greatest width of 

 head, 21 millimetres. 



Type: TJ. S. National Museum, No. 12274. 



Habitat : Guayaquil, Ecuador. 



Proceedings National Miiaeum, Vol. XIV — No. 847. 



167 



