- 'Lse - 



Su"bfa ■ '' xi c r i n ;: u. 



-iLLA Dall. 



OYOlIlJpiLLA PIuiSIATEEUia n. >ry, 



DescrL^-- '. ■ , ,„ - Jhell ^^ "'■ .iae, ';': I'l, ^^ ■■■biGuler, 

 sub equilateral, moderately iirifalted; dors-" 

 1_~ j_^i "f; Q ■f"'!^5 "'?'t'^r°T. r'' '-! r '^"1 n P * f^l i~"'^'t;l'^" i"~T'g> nvoduc "^ sriorlv* 



eixternal surface soixLptiu-ed with unennall; , ''iue con- 



eeu':"-'ic stride, more nrononjioe'^ on worn surface:; rnal, 



the tee'' " -iie:'!^ ^j j.^-reiiut; ~ . 



Dimensions .-. Lat., 24 mm.; alt., 24 mm.; ' ' '- •, 3 liici. 



Hemarlrs .- 0_. plasiatenui s is >nor,'n from rr. incom-olete left 

 valve. Onl^/ a pax't of the I'liixule it; ^^retjervy ., uub i ^ i-a^. be 

 ^' dged that it is relatively Harge and limited hy a feebly in- 

 cirec! line. 2his species closel;' resembles ''"' '' enui s 



(H^cliiz) il) of '"' ''-i size, but is more orbi": ' ' "''"•- 'vith 



slightly more eom^^^ressed teeth. J. oyolioa (Guppy) (?), from 



^1). Journ. --le Oonchyl., vol. Z- , p. 2 50, pi. lo, :^1 ;.:. 1, 1', 1 

 as Dosinia ( Artemis ) tenuis . 



(?). Quart. J-)",r. G-eol. Soe. I'. , ". ''"^', p. 502. 



f:r p. Eocene of I'anzanilla, Trinidad .twa 0. ';^atuacngis 



