1879.] ^VO [Cope. 



the dorsal and lateral bands and lateral dark spots, obsolete. General color 

 bright olive. 



13. Eutcenia cyrtopsis Kenn. 



14. Trimorphodon upsilon Cope. 



15. Elaps euryxanthus Kenn. 



Remarks. 



This collection, though small, is of interest as serving to fix the exten- 

 sion of the Sonoran fauna to a point further south than has been hitherto 

 practicable. The following are the faunal affinities of the fourteen species 

 enumerated above. Eutcenia sirtalis may be dismissed as common to 

 Mexico and the Nearctic Realm ; Procinura cemula may also be passed by 

 as peculiar to the locality investigated, so far as yet known. Stenostoma 

 humile, is, according to Baird and Girard, an inhabitant of the Pacific dis- 

 trict, and is a very rare species. Species found in various parts of Mexico 

 are : Anolis nebulosus, Cyclura acanthura and Cnemidophorus communis ; 

 the last occurring also in S. W. Texas. Trimorphodon upsilon is a species 

 of West Mexico, having been found at Guadalaxara, Guanajuato, and the 

 present locality ; but is not as yet known from the West Coast. Six species 

 are exclusively of the Sonoran district viz: Sceloporus tristychus ; S. 

 clarki, Phimothyra grahamice ; Eutcenia cyrtopsis and Elaps euryxanthus. 

 Phyllodactylus tuberculosus belongs to the Sonoran fauna, but occurs also 

 south of Batopilas in Western Mexico. Phrynosoma cornutum is also 

 Sonoran, but is Texan besides. The comparison of this list so far as it 

 relates to the Mexican fauna, is with that of the Tableland ; only two 

 species of it, occurring in the Tierra Caliente also ; these are the generally 

 distributed Cyclura acanthura and Cnemidophorus communis. 



Mr. Wilkinson's collection contained a specimen of Pelamis bicolor, 

 which he informs me was taken in the Gulf of California near Guaymas. 



In the Proceedings of the Philadelphia Academy for 18G8, p. 310, I 

 noted that William Bischoff had sent to the Smithsonian Institution from 

 Mazatlan the species Agalychnis dacnicolor Cope, Leptodira personata 

 Cope, Leptodira pacifica Cope, and a species of Holbrookia, which I named 

 H. bischoffii, but did not describe. Since then it has been described under 

 the name of H. elegans by Bocourt (Mission Scientifique de Mexique 1874, 

 p. 164), which name it must retain. I add to this list Bufo debilis Girard, 

 which gives the extreme western limit of its range. It occurs also in West 

 Texas. 



II. Guanajuato, Duges. 



One collection from this locality was sent me by Dr. Duges, and another 

 collection was subsequently received by the Smithsonian Institution. I 

 give the catalogue numbers of the specimens contained in the latter. 



Batrachia. 



1. Spelerpes belli Gray. 



2. Bufo punctatus B. and G. 



3. Bufo intermedins Giinth. 



4. Bufo monksiw Cope, sp. nov. 



Cranium without any crests, superior borders of orbits not reverted, can- 



