28 SCIENTIFIC SOCIETY OF SAN ANTONIO 



74. Agkistrodon mokasen Beauvois Copperhead: 



High-land Moccasin 

 Agkistrodon mokasen Beauvois, Trans. Am. Philos. 



Soc, Vol. 4, 1799, p. 370. 

 The copperhead, or "rattlesnake pilot" as it is sometimes 

 ealled, is apparently not a common species in Bexar County. 

 Cope says that it "is common from Dallas to San Antonio", but 

 this is the only published reference I can find. A specimen from 

 San Antonio is in the Scientific Society collection, Garni ob- 

 tained one on the road from the city to St. Louis College and 1 

 captured one in a wild park along the San Antonio River. I 

 found only one specimen in the Marnock collection. 



75. Agkistrodon piscivorus (Lacepede) Cotton-mouth 



Stump-tail Moccasin 

 Crotalus piscivorus Lacepede, Hist. Nat. Serp., Vol. 2, 



1789, p. 130. 

 The water moccasin has been collected near Helotes by 

 Marnock. Reliable local observers tell me that it occurs in the 

 San Antonio River and I have personally observed it on the 

 Salado. 



76. Crotalus atrox Baird and Girard. Texas Diamond 



Rattlesnake 

 Crotalus atrox Baird and Girard, Cat. N. Am. Rept., 



Pt. i, 1853, P- 5- 

 The diamond rattlesnake is still common in some sections 

 of the county. 



77. Kinosternon carinatum (Gray) Keeled Musk Turtle 



Aromochelys carinata Gray, Proc. Zool. Soc. Lond., 



1855- P- 199- 

 Recorded from the Medina River by Yarrow. Garni col- 

 lected a specimen in the San Antonio River. 



78. Kinosternon flavescens (Agassiz) Yellow Mud Turtle 



Platythyra flavescens Agissiz, Contr. Nat. Hist. U. S., 

 Vol. 1, 1857, p. 430. 

 Louis Garni sent me two specimens. The following are his 

 notes on this species: "Found occasionally in our natatorium. 

 After heavy rains they are abundant in all depressions in woods 

 and along roadsides where the water has collected. In some ex- 

 amples the back is overgrown with moss and in some specimens 

 the carapace is higher than in others." 



