182 [October, 



rivers Zuni and Great and Little Colorado of the West. Too much praise 

 could not be awarded to Dr. Woodhouse, for the zeal and intelligent industry 

 he has manifested in the performance of his arduous duties as physician and 

 naturalist to the Expedition. 



When the reptiles brought from Oregon and California by Mr. Townsend, and 

 those of the Exploring Expedition, shall have been carefully studied, much 

 will have been done toward the attainment of a knowledge of the geographical 

 distribution of our reptiles, to which the admirable work of Prof. Holbrook has 

 so greatly contributed. To him we owe nearly all the knowledge we possess 

 with certainty of North American Herpetology, having brought into order and 

 system what was before uncertain and confused, and in cleir and classical 

 language determined their characters with precision j thus greatly facilitating 

 the labors of all future inquirers. 



ANOTA, Hallowell. 



Gen. Char. Head small, covered above with polygonal plates ; a row of pointed 

 spines posteriorly ; nostrils within the supraciliary ridge : supraciliary ridge 

 but slightly developed, terminating posteriorly in a small pointed spine ; chin 

 covered with smooth granulations of unequal size ; a row of pointed scales on 

 each side ; two gular folds ; no external openings for the ears ; extremities 

 slender; upper surface of body smooth, the numerous pointed species of the 

 ordinary Phrynosomas not existing; no fringe along the lateral margins of the 

 abdomen ; body compressed, oval, tail nearly as long as the body ; femoral 

 pores very distinct. 



Anota M'Callii, 



Sp. Char. Margin of upper jaw denticulated posteriorly; the two posterior 

 of the rows of spines along the margin of the under jaw small ; the two anterior 

 to these quite large ; the two middle spines of thie row upon the occiput much 

 longer than the rest, and incurvated; intermediate spine very small; body light 

 ash color above, with a narrow dorsal line of black extending from the occiput 

 to the root of the tail; two oblong dark colored blotches upon each side of the 

 neck ; two rows on each side of the dorsal line, of dark colored subcircular 

 spots, two in a row, the external larger than the internal ; ground color of upper 

 surface of tail and extremities same as that of the upper surface of the body; 

 under surface of body and extremities silvery white, immaculate; twenty dis- 

 tinct femoral pores on each side. 



Dimensions. Length of head V lines; greatest breadth, exclusive of spines, 

 8 lines ; length of longest spine b\ lines; of the next to it 2J; length of arm 

 "7 lines; of fore arm 5 lines; of hand, to extremity of longest finger, 6 lines ; 

 length of thigh T lines ; of tibia 7 lines ; of foot to extremity of longest toe, 

 7 J lines; length of neck and body to vent 2 inches 4^ lines; length of tail 1 

 inch 8^ lines ; total length 4 inches 5 lines. 



Habitat. Great Desert of the Colorado, between Vallicita and Camp Yuma, 

 about 160 miles east of San Diego. 



Remarks. The animal above described is a Phrynosoraa, the ears of which 

 are concealed by the integument. It was caught by Col. George A. M'Call, of 

 the United States Army, during a recent journey through California and Oregon, 

 and presented by him to the Academy, with two young specimens of Phrynoso- 

 raa coronatum. The great length of its middle posterior spines, its contracted 

 neck and singularly shaped body and tail, give to it a very odd appearance, 

 dififering remarkably from that of any of the known Phrynosomata. 



Descriptions of New Species of Reptiles from Oregon, 



By Edward Hallowell, M. D. 



Troi'idonotus concinnus. 



^ Sp. Char. Head slightly swollen at the temples, depressed ; canthus rostra- 



lis grooved ; a longitudinal yellow line running along the median line of the 



back, including one entire row and one half of each of the adjoining rows of 



