NATURAL SCIENCES OF PHILADELPHIA. 127 



without the dorsal or ventral spots ; destitute of, with rudimentary, or fully 

 developed crests; and of ever}' shade of color between vermillion and brownish 

 green. The color and character of the skin seem to be dependent upon the 

 amount of moisture in the situations in which they are found. Those from 

 high and dry spots are redder and rougher than those from marshy situations : 

 while those whose habits are for the time aquatic, are still greener and smooth- 

 er, and exhibit every degree of development of the dorsal crest. Thus it is 

 probable that this species undergoes changes similar to those of the European 

 Tritons, as detailed by Schlegel and Kaup. 



7. Euproctus, (Gene.) Series of palatine teeth closely approximated ante- 

 riorly, posterior extremities widely diverging. Skull elongated, depressed. A 

 weak post orbitar arch formed by the slender processes of the posterior frontal 

 and tympanic bones. Superior maxillary bone uniting with the pterygoid by 

 the intervention of a jugal bone. Tongue oval, free behind ami at the sides. 

 Anal region frequently prolonged. Digits 4 5. Tail compressed. 



E. platycephalus (Otto.) Molge platycephalus (Otto) 1826. Euproctus 

 Rusconi (Bonaparte), 1839. Euproctus platycephalus (Gray,) 1830. Euproctus 

 puncticulatus (Dum. & Bibr.) 



This and the following three species have been described by MM. Dum. k 

 Bibron as Tritons, but are considered by M. Alfd. Duges (Osteologie et Myologie 

 des Batraciens) as varieties of Euproctus platycephalus. The present 

 species is evidently a Euproctus, judging from the figure of the skull in the 

 Erpetologie generale. 



E. r ugosus (D. & B.) E. r ep a n d u s (D. & B.) E. B i b r on i i (Bell.) 



8. Lissotriton (Bell.) Series of palatine teeth nearly in contact anteriorly, 

 widely diverging posteriorly. Post orbitar arch wanting; posterior frontal 

 bone with a slight projecting supra-orbitar border. Tongue moderate, circular, 

 depressed, slightly free all round. Digits 4 5. Tail compressed. 



L. p u n c ta t u s (Latr.) Triton punctatus Auctoruin. Lissotriton punctatus 

 Bell, 1839. Lophinus punctatus Gray, 1850. 



The form of the tongue seems to be the only peculiarity which separates thi? 

 species from the true Tritons. This, though a slight character, is probably 

 better than that upon which Prof. Bell principally relies in establishing the 

 genus viz.: the smoothness of the skin : thus including the Triton palmi- 

 p e s , and perhaps other species at proper seasons of the year. 



9. Triton (Laurenti). Series of palatine teeth closely approximated anteri- 

 orly, diverging posteriorly. Supra-orbitar border of the posterior frontal bone 

 prominent ; the process rudimentary or wanting. Tongue small papillose, free 

 at the sides only. Digits 4 5. Tail moderate, compressed. 



\ Ommatotriton (Gray). Tongue thick, like a wart, lateral borders scarcely 

 free. 



Syn. Ommatotriton Gray, (1850). Lissotriton (Bell) (Pars), 1839. Lophinus 

 (Gray), (Pars) 1850. 



T. palmipes (Latreille) ? Molge vittatus Gray, (1820). Lissotriton pal- 

 mipes Bell, (1839). Triton vittatus Dum. & Bibr. (1854). 



T. alpestris (Laur. ) 



T. palmatus (Schn.) (1797). Lophinus palmatus (Gray), 1850. 



\ Triton (Laurenti). Tongue depressed, considerably free laterally. 



Syn. Triton (Laur.) Syn. Rep. p. 38, (1768). Hemisalamandra (Pars) (Duts). 

 (1852). 



T. marmoratus (Latreille). This species stands first in Laurenti's 

 Synopsis of Tritons. In the form of the tongue it approaches, and in osteolo- 

 gical characters closely resembles, the Hemisalamandra c r i s t a t a , but the al- 

 most parallel rows of palatine teeth in the latter species gcnericalJy distinguish it. 



10. Hemisalamandra (Duges). (1852). Palatine teeth in two widely sepa- 

 1859.] 



