imiqiie a'^.ong- the Bov^den lucinoiA forms. P. qiisaricos"! 



■lioeene P. aniaTjilis TJall (1) anfl the ^.ecent ./est Indian P. le neo- 

 oyma Dal 1 (r' jinogeneoi;^ group. The Pliocene form is 



fl^. "^rans . 7a;^Tier "^ree Irist. Sci., -hilar'elphia, vol. .^, —'-. . 

 4, ol. 25, fiirrs. 9, 9a, 1898; idem, i3t . 6, on. l?on-:i.:^69, 

 1903. 



f?1. "nil. !ais. Oorirot. .^ool. Harvard, vol. 12, ^ro. 264-2^5 / l'^R6 

 ^roe. TJ. S. I^at. Mus., ^^1. 12, p. 26.'5, -ol.'l' , " . S, 7, 

 1889. 



Isrc-er than oTiacl-rloo static's r/ith :fi. ner pnri less lamello 



ture; while on leucoc~-r.B the sulci on 



defined and the scnl-oture is also less lamellose. 



Ocourrenee .- Lower Miocene : Bov/den "beds, Jiowden, Janaica 

 (jjLll, 1905). ^ ^^Jkf'" 



