118 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



the upper surface of the tail iu a reticulate manner. The limbs are 

 paler than the back, and the digits are cross-barred with whitish. 



The habitat of this si)ecies is unknown. The only specimen was 

 found in a jar with a specimen of Diemyctylus torosus and one of Eana 

 temjporaria; the former Californian, the latter Palfearctic. 



DIOAMPTODON Strauch. 



StraucL, Salam., p. 68; Bonleuger, Cat. Batr. Gracl. Brit. Mus., 2d ed., 1882, p. 38. 



Tongue nearly entirely adherent. Palatine teeth in two long trans- 

 verse arched series, convex forwards, converging backwards, situated 

 behind the line of the choanse, separated from each other by a wide in- 

 terspace. Toes five. Tail compressed. 



This genus I have not seen. Its characters and those of its only 

 species are copied from Boulenger's work above quoted. 



DICAMPTODON ENSATUS Esch. 

 Strauch, I. c, p. 69; Boulenger, Cat. Batr. Grad. Brit. Mus., 2d ed., 1882, p. 38. 

 Trilon ensatits, Eschsclioltz, Zool. Atlas, p. 6, PI. 22. 



Head broad. Snout rounded. Body stout. Limbs short. Toes free. 

 Tail sword-shaped, curved upwards, as long as head and body. Skin , 

 nearly smooth ; parotoids and costal grooves apparently absent. Eed- 

 dish-brown; back marbled with brown. Total length about four decim- 

 eters. 



I have not seen this species, and know it only from the figures and 

 descriptions above cited. It is said to come from California. 



HYNOBIID^. 



Hynoiiidae Cope, proc. Acad. Phila., 1859, p. 125. 



Otoglossal cartilage, none; a second epibranchial. Second basi- 

 branchial not continuous with the first. 



Vertebra) amphicoelous. 



No parasphenoid teeth ; vomerines on the posterior edge of the 

 vomeropalatine bone. Pterygoid bones distinct. 



According to Wiedersheim* two genera of this family, Hynobius 

 and Eanidens, possess a lachrymal bone in addition to the prefrontal. 

 Whether it is a characteristic of the other genera remains to be ascer- 

 tained. The same author shows {I. c.) that the hypohyal cartilages are 

 very elongate itf the two genera named, and are not articulated with 

 the basibranchial, thus permitting of independent motion. (See Phite 

 25, figs. 10-11.) He also figures a cartilaginous connection between the 

 stapes and the quadrate, as occurs in the Trematodera, which is a char- 

 acter of much importance. 



* Das Kopfakelet der Urodelen, pp. 66-71. 



