22 U. S. P. R. R. EXP. AND SURVEYS ROUTE IN CALIFORNIA. 



ties pale olive ; a narrow, dark colored vitta extending from the anterior margin of the eye to 

 the snout, another much broader from the posterior margin of the eye to the shoulder ; margin 

 of upper jaw of same color as the vitta ; posterior part of abdomen and under surface of 

 extremities orange colored ; chin and throat, whitish ; abdomen thickly granulated. 



DIMENSIONS. Length of head and body 1| inch ; of head, f ; breadth, f ; length of anterior 

 extremities, $ ; of posterior, 1. 



HABITAT. Tejon Pass. 



GEN. OBS. It will be observed that it wants the squalus tooth-like mark upon the head, 

 and the markings upon the back, which belong to scapularis. 



FAMILY III. 



SALAMANDEIDJE. 



CHAR. 1. The presence of a tail at all periods of their existence readily distinguishes the 

 animals of this family from those of the last, though it varies in length and form. 



CHAR. 2. The body is elongated, round, and covered with a skin adherent to the muscles 

 beneath. 



CHAR. 3. The tongue varies in shape, size, and mode of attachment. The teeth also vary 

 greatly in the different genera. 



CHAB. 4. The tympanum is not visible. 



MUTABILIA, Fitz. 



CHAR. The animals of this tribe undergo a complete metamorphosis ; the young breathe 

 only in water, and with gills, like fishes, but in their adult state respiration is performed with 

 lungs. (Holbrook.) 



Sub-Family PLETHODONTIDJE. 



ANEIDES, Baird 



CHAR. Head large, swollen at the temples, snout angular, eyes very prominent ; tongue 

 obcordate, more or less truncate posteriorly, attached in front, and along the middle, sides quite 

 free, quite free posteriorly, but less so than at the sides ; maxillary teeth greatly developed, 

 especially those of the lower jaw, which are spear-shaped, sharp-pointed, more or less convex 

 anteriorly, concave posteriorly, with a ridge in the middle, about J of a line in length ; vomerine 

 teeth in two convergent rows, behind the internal nares meeting posteriorly, their convex surfaces 

 presenting inward ; sphenoidal teeth very numerous, sharp pointed, thickly set like a brush in two 

 rows,, closely in contact in the anterior third, posteriorly a very narrow linear interspace, not 

 enlarged behind ; in the original specimen, this narrow interspace is not so distinct, so that they 

 might almost with propriety be described as a single row ; extremities slender ; fingers and toes 

 slightly compressed, free ; 1st finger much shorter than 4th ; 2d shorter than 3d ; 1st toe much 

 shorter than 5th ; 2d than 3d ; 3d and 4th of equal length , skin smooth, costal grooves well 

 marked, twelve or thirteen in number, tail round, tapering to a point, very slightly compressed 

 at tip, about same length as head, neck, and body. 



