THE BATRACHIA OF NORTH AMERICA, 



317 



found ia every directiou along the borders aud river valleys of tlie first 

 plateau region of Texas. Mr. G. W. Marnock, who discovered it, in- 

 forms nie that after rains it is very nois}^, iuaking the rocks resound 

 with its cry, which is somewhat like a dog's bark. It hides in fissures, 

 aud is so difiicult to find as to be generally unknown to the country 

 33ople, who suppose that the voice proceeds from. a lizard. According 

 to Mr. Marnock the eggs are hatched iu winter, and the tadpoles pass 

 their existence in temporary pools of raiu-water which collects in iioles 

 iu the rocks and at a distance from the creeks. 



Fig. 80. Lithodytes latrans. No. 1059. Helotes, Texas ; J. 



Additional specimens of this species received from Mr. Marnock show 

 that it reaches a larger size than the above specimens indicate. I give 

 the following 



Measuremenis. 



M. 



LeDgtli of head and body 094 



Length of head, including tympana 025 



Width of head at posterior edge of tympana 039 



Length of fore limb 055 



Length of hind limb 115 



Length of tibia 039 



Length of tarsus , 020 



Length of rest of foot 035 



In the large and old specimens a mineral deposit takes place iu the 

 skin, as iu the Fhyllo medusa scleroderma Cope and IStereocyclops incrass 

 satus Cope. It is especially abundant in the cranial derm, but which is 

 not, as iu cases where the -ossification appears on the surface of the 

 cranial bones, adherent to the latter. 



The Hylodes augusti (Duges MS.), Brocchi Misiou Scientifique de 

 Mexique, 1881, from Guanajuato, Mexico, is related to the present ani- 

 mal. I do not know what the speoific difference is, unless it be in the 

 form of the vomerine patches, which I can not clearly make out from 

 Brocchi's description. 



Catalogue 

 number. 



No. of 

 spec. 



Locality. 



When 

 collected. 



From ■whom received. 



Nature of spec- 

 imen. 



10751 



1 

 1 

 1 

 2 

 2 

 1 



Bexar County, Tex 



do ■- .. 



do 



do 



Feb. 10,1880 

 . . do 







10752 



do 



Do. 



10753 



...do 



do 



Do. 



10058 





do 



Do. 



10529 



do 



do 





do 



Do. 



13633 





do 



Do. 













