.MAINLAND ii\.<)\.nc,\('\]. s^u\■l•;^ *<547 



'■ roh/iiinrjiltiiia ((uii prcssd is a cosmopolitan lonii, cxijoeiaily common 

 in lcni|i('i;ili' lalitiidcs. ... It is almndnnt in (he tcmpi-ratc jxjrtion of 

 llic Noilli .\tlanlic. |iicrri'i'iiii: shallow-water marjrins. Imt cvlcndini:,- 

 sonu'tinics tn a dcplli df ion tn dou fatlioins. In llic trupical Smilli At- 

 lantic and ill llic N'nrtli and Suutli I'acilic it is less t"f('<|ii('nt. 



'^•' Tt lias i)cc'n recognized as a fossil in the lower and middle Lias of the 

 west and north of Enuland (P.rady, Blake); in the lower Oolite, the 

 Upiu'c Oxford Clay, and tlic Kinimeridge Clay of Mn^dand (Parker and 

 Jones), and in the Cretaet'oiis system of Enfjland, I'rance, CJermany, and 

 Nt)rth America, and generally in the Tertiary and I'ost-Tertiary forma- 

 tions of Europe." 



Occurrcinr. — X.w.iKMOY l''()i{.\[ATiON'. Woodstock. Well at Chesapeake 

 Beach at 90-92 feet. 



Cn]]rrlli)ns. — Johns TI()])kiiis T^niversity. ilaryland Ceological Survey. 



ruLY.MORriiiXA KLEGANTi.ssiM.v Parker and Jones. 

 Plato LXIII, Fig. 11. 



Pohjuiorpltliut rlcf/diitlssiiiiK Parker and Jones, 1805, Phil. Trans., vol. civ, p. 4:^*^. 

 table 10. 



PoJijmorph'nia eletjoiitisxiiiKi Brady, Parker and Jones, 1870, Trans. Linn. Soc. Lon- 

 don, vol. xxvii, p. "Jol, pi. xl, tig. 15, a-c. 



Polijinorphina eJeganiigxinia Bagg, 1896, Bull. 141, U. S. Geol. Survey, p. 92. 



rohjmorphina eler/aniissima Bagg, 1898, Bull. Amer. Pal., No. 10, p. 30. 



Description. — Test ovoidal, anterior end acute, posterior obtusely 

 rounded; chambers four or five, elongate, arranged in an inequilateral 

 biserial manner and overlapping in such a way that while one side re- 

 mains nearly flat the opposite is more or less irregularly vaulted and 

 shows all the chambers in parallel arrangement; final segment broad 

 below, embracing, and bearing the mammillate aperture upon the an- 

 terior end. Shell surface smooth, finely perforate; length, 0.60 mm.; 

 breadth, 0.40 mm. 



Professor Brady places under this species the form P. problem a var. 

 deltoidea Eeuss, and P. anceps Reuss. 



Occurrence. — Xaxjemoy Formatiox. Woodstock. 



Collection. — Johns Hopkins University. 



