78 CONTRIBUTIONS TO PAL^ONTOLOGY 



Carpites walcotti Dorf, n. sp. 

 (Plate 19, Figs. 1, 2) 



There are 6 nearly perfect specimens from 3 localities which are obviously elongate seeds. 

 Comparable fossil seeds are apparently rare. They bear a superficial resemblance to the seeds 

 referred to Pisonia fructifera Berry from the Wilcox fiora ' but are clearly not the same species. 



Description — Seeds narrowly elliptic in fiattened view, abruptly truncate at the apex and 

 gradually narrowed below to an acutely cuneate base; length rather consistently 1.5 cra., width 4 

 to 5 mm., peduncle stout, long, up to 1.8 cm., surface ribbed, the costte widely spaced and num- 

 bering 3 or 4; apex invested with thin, short projections, the o\iter ones longer than the inner ones. 



These seeds are unusually complete and sliould be easily identified generically. I have as 

 yet found no modern seeds, however, which I could consider strictly comparable. Those of 

 Nyssa aquatica Linne, which are borne singly on long peduncles, are often of precisely the same 

 character,^ though they may become larger and more rounded. 



Occurrence — North of Walcott, Wyoming, Loc. P. 373; Elk Mountain road, Wyoming, Loc. 

 P. 374; Craig, Colorado, Loc. P. 375. 



Collection—H. C. Mus. Pal., Cotypes Nos. 1385, 1386. 



Carpites glumaeformis Lesquereux 



(Plate 14, Figs. 3, 4) 



Carpites glumceformis Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 7, 304, pl. 35, fig. 4d, pL 60, figs. 14-17, 

 1878. 



Seeds ( ?) of this type are rather abundant in the collections, being represented by niore than 

 a dozen specimens. They are essentially lilve the type and figured specimens of this species, wliich 

 is common in the Black Buttes flora. No other fossil occurrences are known. The exact nature 

 of these specimens has not been determined. 



Occurrence — Corson Ranch, Wyoming, Loc. P. 372; north of Walcott, Wyoming, Loc. P. 373. 



Collection—V. C. Mus. Pal., Plesiotypes Nos. 1387, 1388. 



PhyUites trillioides Dorf, n. sp. 

 (Plate 17, Fig. 3) 



There are but 2 incomplete specimens of this type in the collections. The general outline, 

 venation, and heart-shaped base are typical of the leaves usually referred to Smilax. In modern 

 leaves of Smilax, however, I have never seen forking primary veins such as are present in these 

 fossil specimens. The leaves of Trillium, on the other hand, are almost always characterized by 

 forking primaries (cf. T. cernuum Linne).' In the absence of more complete material, however, 

 it is impossible to make a definite generic reference. 



These specimens resemble both Smilax? inquirenda Knowlton from the Laramie formation * 

 and S. carbonensis Cockerell from the Hanna formation.^ There are enough characters preserved, 

 however, to incUcate that they are not conspecific with either. 



Occurrence — Craig, Colorado, Loc. P. 375. 



Collection—V. C. Mus. Pal, Type No. 1389. 



Bracts (?) 

 (Plate 14, Fig. 2) 



There are several well-defined specimens which may be seed bracts or bud scales. Although 

 their systematic position is problematical, they are sufficiently well preserved to be recorded for 

 possible future reference. 



Occurrence — Corson Ranch, Wyoming, Loc. P. 372. 



Collection—lJ. C. Mus. Pal., No. 1390. 



> Berry, E. W., U. S. Geol. Surv. Prof. Paper 156, 68, pl. 11, figs. 5, 6, 1930. 



' See sheet No. 201 (,= N. uniflora Wang.) at Princeton University herbarium. 



' See sheet No. 51, Princeton University herbarium. 



«Knowlton, F. H., U. S. Geol. Surv. Prof. Paper 130, 118, pl. 4, fig. 5, 1922. 



'Lesquereux, Leo, Rept. U. S. Geol. Surv. Terr., vol. 7, 94, pl. 9, fig. 5 ( = Smilax grandi/olia Unger), 1878. 



