1917.] NATURAL SCIENCES OF PHILADELPHIA. 11 



latter examined the distance from the wrist to the tip of the longest 

 finger is contained in the length of the head and body 12.6 to 12.7 

 times as compared with 9.27, 9.7, 10, and 10.6 times in A. stejnegeri." 

 Our specimens of the present species show the same measurements 

 as about 8 or 9. Possibly A. macr-odactylum, A. epixanthum, and 

 A. stejnegeri may represent simply variations of one wide-ranging 

 species. Also an example in the collection from La Grande in 

 Union County, Oregon (M. Hebard and J. A. G. Rehn on August 15, 

 1910). 



Ambystoma altamirani Duges. 



Amhlydoma altamirani Duge', La Naturaleza, (2) II, 1896, p. 459, PI. li). 

 A 3,100 metros de altura — en la serramla de las Cruces perteneciente al 

 Valle de Mexico. (Nos. 10,562 and 10,563, A. N. S. P., topotypes.) 



These examples both in the axalotl stage, larger nearly trans- 

 formed, gills gone and mouth in the larval stage. 



Ambystoma epixanthum Cope. 



Aitihhjsloma epixanthum Cope, Proc. Acad. Nat. Sci. Phila., 1883, p. 16. 

 8wamp near the head of the South Boise PLiver, on the south .side of the 

 Sawtooth Mountain Range, Idaho. (Nos. 3,880 to 3,883, A. N. 8. P., 

 types.) 



Ambystoma tenebrosum (Baird and Girard). 



Five examples, from Body Bay and Felton, California. 



Ambystoma microstomum (Cope). 



Amblystoma microstomum Cope, Proc. Acad. Nat. Sci. Phila., 1861. p. 123. 

 "Ohio" (= Wabash River, Indiana). (No. 1,285, A. N. S. P., tyi»«. 

 Wabash River, Indiana. Dr. McMurtrie.) 



Nine examples: Ohio (Columbus); Missouri (St. Louis); Texas 

 (Houston and Dallas). Two examples from St. Louis show two or 

 three costal spaces (in one case two on each side and three or four 

 in the other) between the fore and hind limbs when appressed to 

 the sides. The Columbus specimen has about three on one side 

 and four on the other. A specimen without locality has but a single 

 costal space and of small size. The type contains about two or 

 three .spaces, so far as may be determined, as it is soft. In most of 

 the examples probably three costal spaces would be the average. 



As the type locality appears wrongly quoted, the following is 

 explanatory. The original account says, ''another specimen of 

 an Amblystoma on the table, from Ohio, Mr. Cope observed, 

 had been regarded *as belonging to the Sal. porphyritica of Green. 

 Prof. Baird having shown that that species is the S. salmonea of 

 Storer, or Pseudotriton salmoneus Baird, he would call the Ohio 

 .species Amblystoma microstomum." This refers^ to a description 



^ Proc. Acad. Nat. Sci. Phila., 1856, p. 8. 



