Pleistocene Snails from San Patricio County, Texas 29 



Lower unit 



1. Conglomerate, quartz and chert gravel, with pehble to 

 boulder-size material; pockets of medium to coarse- 

 grained sand; petrified wood, horse bones, and other 

 indeterminate bone fragments; covered at base of 

 quarry 3 Q 



Total thickness of measured section 15 



Paleontology 



LIST OF FAUNA AND FLORA 

 Recent 



Land snails 



Bulimulus alternatus mariae (Albers) 

 Praticolella berlandieriana ( Moricand ) 



Pleistocene Upper unit 

 Land snails 



Anguispira alternata (Say) 



Bulimulus- alternatus mariae ( Albers ) 



Euconulus chersinus trochulus (Reinhardt) 



Gastrocopta armifera (Say) 



Gastrocopta contracta (Say) 



Gastrocopta cristata (Pilsbry and Vanatta) 



Gastrocopta tappaniana (C. B. Adams) 



Haioaiia minuscula (Binney) 



Helicina orbiculata tropica "Jan" Pfeiffer 



Polygyra texasiana ( Moricand ) 



Praticolella berlandieriana ( Moricand ) 



Pupilla blandi Morse 



Pupoides albilabris (C. B. Adams) 



Retinella indentata (Say) 



Retinella indentata paucilirata (Morelet) 



Stenotrema leai aliciae (Pilsbry) 



Strobilops texasiana (Pilsbry and Ferriss) 



Succinea grosvenori Lea 



Snail eggs 



Freshwater snails 



Armigerus obstructus ( Morelet ) 

 Helisoma tenue sinuosum (Bonnet) 

 Physa sp. 



Seed 



Scleria? sp. 



Pleistocene Lower unit 

 Vertebrates 



Reworked Tertiary and early Quaternary forms 

 Invertebrates 



Reworked Devonian Heliophyllum sp. 

 Land Plants 



Reworked and silicified Miocene palm wood 





