2?0 BUI^LETIN 31 220 



PIvATE 19 

 Figure Page 



1. Trinacria decisa Conrad, 18.5 mm 41 



2. The same, 20 mm. Both from base of Claiborne Bluflf, Ala. 



3-6. Trinacria declivis Conrad 42 



Fig. 3, 18 mm. 



4, 21 mm., base of Claiborne Bluff. 



5, 8.5 mm., Lisbon. 



6, 18 mm., Ivisbon, Ala. 



Trinacria pectunculaHs Lea, 4 mm 42 



The same, 4.5 mm. Claiborne sand. 



Trinacria ovalis Harris, 12 mm , 43 



Base of Claiborne Bluff, Ala. 



Trinacria perplana Q.onT&d,, 16 mm 43 



The same, 13.5 mm. Claiborne sand. 

 Trinacria ellipsis Lea 44 



Fig. 12, 10 mm.. Claiborne sand. 



13, 7 mm. 



14, 9 mm. 



15, 10.5 mm., Claiborne sand. 



16, 17. T. ellipsis, var lisbonensis, n. var 45 



Fig. 16, 8 mm. 



17, 7 mm., Lisbon, Ala. 



