221 St. MAURICB and Ci.AIBOKNK PELECYPODA 221 



PLATE 20 



Figure Page 



1,2. Trinacria cossman7ii Dall 45 



Fig. I, 9 mm., Claiborne. 

 2, 8.5 mm., Claiborne. 



3, a. Trinacria {Pachecoa) cainei, n. s'g. & sp., 9.5mm 46 



4-8. GlycynieHs staniinea Conrad 46 



Fig. 4, 44 mm 



5, 45 mm. 



6, 15 mm. 



7, X4 mm. 



8, X 4, Claiborne. 



9-II. Glycymeris idonea Conrad 47 



Fig- 9. 35 mm. 



10, 36 mm. 



11, 6 mm. 



12-15, Glycymeris lisbonenis, n. sp 48 



Fig. 12, 36 mm. 



13, apical view of a young specimen, 6.7 mm, 



14, 8 mm. 



15, 37 ttim., Lisbon, Ala, 



