THE I5ATRACIIIA OF NORTH AMERICA. 



149 



medially, and nearly or quite in contact. The pterygoid patches com- 

 mence at some distance behind these. They are of usual breadth, but 

 diverge more posteriorly than in the species of the first section of the 

 genus, resembling thus many species of Spelerpes. The teeth are very 

 minute, and are arranged in series directed backwards and inwards. 

 The tongue is a little more free than in P. glutinosus, as tlie lamina 

 connecting the anterior and median points of support is quite thin. 



The inner toe in both pair of limbs is quite small, but free and better 

 developed than in P. glutinosus. In the anterior pair the third is the 

 longest; the second is a little shorter than the latter, and the fourth a 

 little longer than the first or inner one. The longest toe in the poste- 

 rior limbs is the third likewise, the fourth being nearly equal to itj 

 whilst the second is a little longer than the fonrth, which itself is a 

 little more developed than the first or innermost. Phalanges 1-2-3-2; 

 l_2-3-3-2. 



The skin is perfectly smooth externally, but on being examined under 

 the microscope it exhibits a mesh-work of little stellated mucous pores, 

 similar to those of Autoda.v lugiibris, but proportionally larger. 



According to a sketch from life inade by Mr. Drayton, of the United 

 States Exploring Expedition, the ground color is milky white, with 

 crowded dots of reddish brown. On the specimens preserved in alcohol, 

 however, the body, head, and limbs are of a uniform dark brown, lighter 

 beneath. Under a low magnifying power minute dots may be observed 

 scattered all over the surface. The color would appear to vary some- 

 what. A drawing in the Smithsonian records, colored from life by 

 Samuels, represents the sides of head and body with lower surface of 

 tail and anterior faces of limbs of a bright orange. This is the color of 

 living specimens which I have taken myself. 



2 ,3 4 ; f . r*S< g > . . Q j 



Fig. 35.— riethodon oregonensis. ISo. 13946. Berkeley, Gal. ; \. 



Measurements, in inches. 



In. Lin, 



Length from snont to gape .5 



Length from snout to galar fold 9. 3 



Length from suont to axilla 12 



Length from snout to groi u 2 4 



Length from suont to end of vent .- 2 9. 2 



Length from snout to end of tail 4 10.2 



Length of fore limb 10 



Length of fore-foot 3. 5 



Length of hind limb 10. .5 



Length of hind foot 4. 5 



