Pleistocene Snails from San Patricio County, Texas 37 



Plate 2 



Explanation of Plate 2 



Figs, la, lb.— Armigerus obstructus; X 7.5; Fig. la, dorsal view; Fig. lb, umbilical 

 view; Section 2, bed 5; U. S. N. M. No. 638772. 



Figs. 2a.-c.—Helisoma tenue sinuosum; X 2.1; Fig. 2a, dorsal view; ' Fig. 2b, 

 apertural view; Fig. 2c, umbilical view; Section 2, bed 5; U. S. N. M. No. 

 638770. 



Figs. 3a, 3b.— Physa sp.; Fig. 3a, side view; Fig. 3b, apertural view; Section 2, 

 bed 5; U. S. N. M. No. 638771. 



Figs. 4a-c.—Praticolella berlandieriana; X 2; Fig. 4a, dorsal view; Fig. 4b, aper- 

 tural view; Fig. 4c, umbilical view; Section 2, bed 6; U. S. N. M. No. 638762. 



Fgs. 5a-c— Euconulus chersinus trochulus; X 7.5; Fig. 5a, dorsal view; 5b, aper- 

 tural view; 5c, umbilical view; Section 2, bed 5; U. S. N. M. No. 638754. 



Figs. 6a, 6b.— Anguispira alternata; X 1.6; Fig. 6a, apertural view; Fig. 6b, um- 

 bilical view; Section 2, bed 5; U. S. N. M. No. 638751. 



Figs. 7, 10a, 10b.— Bulimulus alternatus mariae; X 1.6; Fig. 7, apertural view; 

 Section 2, bed 6; U. S. N. M. No. 638752; Figs. 10a, 10b, immature speci- 

 men; Section 2, bed 6; U. S. N. M. 638753. 



Fig. 8.—Retinella indentata; X 8.9; umbilical view; Section 2, bed 5; U. S. N. M. 

 No. 638765. 



Figs. 9a, 9b.— Retinella indentata paucilirata; X 6; Fig. 9a, dorsal view; Fig. 9b, 

 umbilical view; Section 2, bed 5; U. S. N. M. No. 638766. 



