Pleistocene Snails from San Patricio County, Texas 31 



Chart 2. Distribution and abundance of snails and the seed Scleria? sp. in the upper 

 unit of the Pleistocene deposits of the Fordyce Quarry, San Patricio, Texas. Abundance 

 is indicated by number of specimens; "f" indicates fragmental specimen. 



Section 1 Section 2 



Bed: 5 6 5 6 7 8 9 10 



Anguispira alternata 007210 



Bulimulus alternatus mariae f It 7 9 3 2 6 



Euconulus chersinus trochulus 5 



Gastrocopta armifera 66 



Gastrocopta contractu 121 



Gastrocopta cristata 488 



Gastrocopta tappaniana 00400000 



Haivaiia minuscula 1 00 



Helicina orbiculata tropica 390 1 2 • 



Polygyra texasiana 136 1 



Praticolella berlandieriana If f 3 4 6 1 5 



Pupilla blandi 25 



Pupoides albilabris 325 



Retinella indentata 00200000 



Retinella indentata paucilirata 1 



Stenotrema leai aliciae 00 29 00000 



Strobilops texasiana 307 



Succinea grosvenori 0002 3 000 



Snail eggs 00300000 



Armigerus obstructus 00100000 



Helisoma tenue sinuosum 00200000 



Physa sp 10 



Scleria? sp 1 00 



as fossils for the first time. Gastrocopta contracta is reported as a fossil 

 from Texas for the first time. Pupilla blandi, herein reported from the 

 Pleistocene, is not known in the Recent of Texas. Gastrocopta armi- 

 fera, G. tappaniana (absent in the Recent of south Texas), and Pu- 

 poides albilabris are reported as fossils in south Texas for the first time. 

 The following 16 species of land snails and two species of freshwater 

 snails are reported from the Pleistocene of San Patricio County for the 

 first time: Anguispira alternata, Bulimulus alternatus mariae, Euco- 

 nulus chersinus trochulus, Gastrocopta armifera, G. contracta, G. cris- 

 tata, G. tappaniana, Hawaiia minuscula, Praticolella berlandieriana, 

 Pupilla blandi, Pupoides albilabris, Retinella indentata, R. indentata 

 paucilirata, Stenotrema leai aliciae, Strobilops texasiana, Succinea 

 grosvenori, Armigerus obstructus, and Helisoma tenue sinuosum. 



Paleoecology 



General information concerning climatic and geographic distribu- 

 tion of the snails in the Fordyce deposits has been compiled from 





