Mat, 1893.] REPTILES OF THE DEA.TH VALLEY EXPEDITION. 191 



taken the identification of his specimen (IT. S. Nat. Mus. No. 10785) 

 by Dr. Yarrow as conclusive, without knowing that not a single speci- 

 men of all the horned-toads enumerated by Yarrow in his Catalogue 

 of Reptiles in the U. S. National Museum really belongs to Ph. ni'callii. 



The fact, however, that Boulenger had given characters apparently 

 separating northern and southern specimens, led me to examine the 

 material at hand with a view to ascertain whether it might be possible 

 to recognize two or more races, but an inspection of about one hundred 

 and seventy-five specimens fails to disclose any character or combina- 

 tion of characters by which to separate them. The shape of the head, 

 length, shape, and direction of head spines, length of limbs, number of 

 femoral pores, and coloration are so variable that no separation can be 

 built upon any of these characters. To illustrate this, let me discuss 

 the contents of the two jars out of each of which Mr. Boulenger had 

 one specimen, viz : U. S. Nat. Mus., No. 10785 and 11770. The former 

 is Boulenger's so-called Ph. ni'calUi, with the occipital spines as long as 

 the horizontal diameter of the orbit, and seven femoral pores on each 

 side. 



In No. 10785 (locality and collector now unknown), out of which came 

 Boulenger's so-called Ph. m^callii, there are now left seven specimens, 

 six males and one female. The number of femoral pores on each side 

 in the males are respectively 9, 8, 7, 7, 9, 8, and in the female 7 ; in the 

 latter the occipital horns are comparatively best developed, and in at 

 least one of the large specimens this horn is considerably shorter than 

 the horizontal diameter of the orbit. 



In No. 11770 (Camp 12, King's Exped., Nevada, R. Ridgway, coll.) 

 there are now six specimens, three adult males and one young, and one 

 adult and one young female. The number of femoral pores in the adult 

 males are respectively 9, 10, 8, and in the adult female 9; in the first- 

 mentioned male the occipital spine is longer than the horizontal 

 diameter of the orbit ; in the second, the two dimensions are equal; 

 in the third male and in the female the spines are shorter. As there 

 seems to be a slight average difference between the specimens in the 

 two jars, I was led to examine my series with a view to determine 

 whether the southern specimens average a smaller number of femoral 

 pores than northern ones, but without success. 



The reexamination of my material, however, led to the unexpected dis- 

 covery of anew species from the sandy coast desert of the Mexican 

 state of Sonora, which I have called Ph. goodei,* and dedicated to Dr. 



*Phrynosoma goodei sp. nov. (plate ii, figs. 3, a-e). 



Diagnosis. — Nostrils pierced within the canthi rostrales; one series of enlarged 

 spines around the periphery of the hody ; tail more than twice the length of the head ; 

 tympanum entirely concealed hy scales; 7-10 femoral pores; 3 temporal horns only 

 on each side, the. posterior one nearly on a line with and of the same size as the oc- 

 cipital horns ; only three posterior inframasillary plates spinous. 



Habitat. — Coast deserts of the state of Sonora, Mexico. 



Type.—TJ. S. Nat. Mus. No. 8567a; Dr. T. H. Streets coll. 



