AMPHIBIANS 153 



E. longicauda (Green). Body slender, with a very long tail and 

 bright yellow or reddish in color, with small black spots on the back and 

 sides which form bars on the tail, and unspotted underneath; length 

 130 mm.; tail 80 mm.; costal grooves 13: Pennsylvania to Tennessee; 

 westward to Missouri. 



E. lucijuga Rafinesque (£. maculicauda Cope) (Fig. 80). Body 

 slender, elongate, orange in color densely spotted with black; legs very 

 long; length 152 mm.; tail 90 mm.: West Virginia to Missouri; north- 

 ward into Indiana and Illinois; often in 

 caves. 



E. quadridigitata (Holbrook). Dwarf 

 salamander. Body small, yellowish 

 above, with a dark line running along 

 each side of the back; length 82 mm.; 

 tail 47 mm.; costal grooves 15; 4 toes 

 on each foot: North Carolina to Florida; 

 westward to Texas. 



E. tnela no pleura (Cope). Body slen- Fig. 80.— The roof of the mouth 



of Eurycea lucifuga: i, inner nares; 

 der; tail strongly compressed; sides black 2, vomerine teeth; 3, parasphenold 



in color, with sparse white spots; a teeth (>om //ay). 



middorsal light line; length 148 mm.; tail 83 mm.; costal grooves 13: 



Missouri, Kansas and Arkansas. 



E. multi plicata (Cope). Body small, brown in color, paler below; 

 length 80 mm. ; tail 170 mm. ; costal grooves 20: Arkansas, Missouri and 

 Kansas to New Mexico. 



14. Hydromantes Gistel. Toes webbed; tongue free all round; 2 

 premaxillaries present; parasphenoid patches separate: 3 species, 2 in 

 Italy. 



H. platycephalus (Camp). Body elongate; tail cylindrical, rather 

 short; color dark chocolate, mottled with black; length 106 mm.; 

 tail 35 mm.; costal folds 12: Yosemite National Park, California. 



ON THE IDENTIFICATION OF THE LARV^ OF THE PLETHODONTED^ffi 



Aquatic larvae are known to occur in the genera Desmognathus, 

 Leurognathus, Hemidactylum, TypJdotriton, Typhloniolge (a permanent 

 larva), Grinophilus, Pseudotriton and Eurycea; these larval forms have 

 all been identified in the eastern and middle western States. They may 

 be distinguished from the larvae AmbystomidcE and Pleurodelidce which 

 inhabit the same region by the presence of a dorsal fin on the body of 

 the larva in these two families; also in the Plethodont larva the legs 

 develop before hatching. This fin is absent in the larvae of thePlethodon- 



