Descriptions of Species. 30 



Au'inKOPODA. 



Cypiidea texana sp. nov. 



Plate I, Figs. 3a, Sh. 



Shell microscopic ; elongate ovate globose, with angular ap- 

 ]ien(lage shown in tig. 1 ; opalescent oi' horny ; cardinal margin 

 toothless, tliickened centrally; opposite or ventral margin sliglitly 

 undulate; surface smooth, and not visilily punctate. 



It is difficult, says Zittel, to classify with certainty even the 

 families of the Ostracoda, owing to the fact that the shell only is 

 l)reserved, which is not sufficiently differentiated to justify exact 

 diagnosis. The species here given occurs in al)undance in tlie 

 (lien Rose l>eds, but usually oidy the merest outlines are j)re- 

 served, or mere granules wliich suggest the form. In the mol- 

 luscan fauna at the plant be<l of the Paluxy, near Glen Rose, 

 bowcver, I was so fortunate as to secure a small fragment in 

 winch the shell structure was well preserved. That the species 

 belongs to the Ci/pridx is strongly probable, reseml)ling both the 

 genera Cypris and Cypridca. I have placed it in the latter pro- 

 visionally, l)ecause it is a marine form, occurring in masses of 

 marine shells or mollusca, while the former genus is a fresh 

 water one and of more recent occurrence. 



There are large masses of sub-oolitic material in the Mount 

 Ronnol l)eds. which are a]:)parently largely composed of these 

 minute Crustacea. The Ci/pri<he are also a1)undant in the Lower 

 Neocomian, or Wealden, of Europe. 



PLANT.E. 



Undetermined species. 



Plate I, Figs. 1, a, h, c, d. 



(" Goniolina?" of author's previous writings.) 



Spherical conedike bodies, varying in size from three-quarters 

 to one and one-half inches in diameter ; slightly elongate, oblate 

 or depressed at upper end, with well defined circular scar show- 

 ing attachment to receptacle; surface consists of minute imbri- 

 cate scales, usually worn down or indistinct ; scales elongate 

 ovate or sul)-(liamond-shaped, elongated toward upper end, and 

 crowded around receptacular scar ; seed minute. 



