- 355 - 



Sub senilis Here GalDb. 

 Seotion Here s. s. 



PHACOIDSS (E^-^) .:.^.x.;-;i!TUS Lall. 



luc ina ' ■'^crjis : Ivsiii oa Gtippy, 1866, Quart. Jonr. Geol. Soc, lon- 

 rlon, y^l. '^2, -p. ""'^P (non I-innaeus, 1758). 



I'iic!l:na Penns^/lvsniea Guppj'-, 1874, C-eol. I.Iag. , dfcade ?, vol. 1, 

 p. 44S , (check list), ex parte, non linnaeus, 1758. 



Lug ina r'ennsylvanica Guppy, 1876, '^/jart. Jour. Geol. 3og. Ion- 

 don, vol. '^2, p. 550 (non linnaeus, 1758). 



Phannjdes ( Here ) pocJaFrinus Ball, 1905, Trans. Wagner Free Inst. 

 3ei., Philadelphia, vol. 3, pt . , o. 1365-1?65, pi. 

 50, fi'ts. IS, IS. 



3e script ion .- "Shell v;hen 2/Oxm.g moderately convex, when 

 senile having an exaggerated thickness and almost spherical con- 

 vexity. It belorigs to the group of P. penns;, Ivani cus I., of 

 which species it is doubtless - precursor, smd the mention of 

 that species by "abb and Guppy in the "Miocene" (=01igocene) of 

 3t. Domingo and Jamaica doubtless refers to ^lie "oresent fossil. 

 For this reason it is best described by eo!:i,Jux'ic.'jn with ?. -oenn- 

 sylvanicns . from which it differs by its smaller size and great- 

 er inflation at maturity, its finer and closer concentric sciMu- 



