158 CONTRIBUTIONS TO PAL^ONTOLOGY 



"Fruit nearly round, one centimeter across, emarginate in the lower part at its point of 

 attachmcnt to a short broken pedicel; surface fJat, covered with small obtuse warts. . . . This 

 seed is surrounded by a flat margin, which may be the borders of a fiattened pericarp." 



Except for its shape, which is somewhat reniform, the Lance Creek specimen is similar in all 

 observable details to the original Black Buttes specimens. No other comparable fossil forms have 

 been noted. A suite of much larger impressions of somewhat similar nature have been collected 

 from the "Fort Union" formation near Bear Creek, Montana.' 



I can ofTer no suggestions as to the systematic relationship of this species. That it belongs 

 to the plant kingdom is shown by the filmy, dark residue of carbon on its surface. Lesquereux 

 has pointed out its resemblance to the flattened drupe of a Magnolia. 



Occurrence — Localities P3651, P3859. 



Collection—V. C. Mus. Pal., Plesiotype No. 2578. 



Carpites walcotti Dorf 



Carpiles walcoUi Dorf, Carnegie Inst. Wash. Pub. No. 508, pt. I, 78, pl. 19, figs. 1, 2, 1938; Bull. Geol. Soc. 

 Amcr., vol. 51, 218, 222, 1940. 



There are 2 seed impressions and a counterpart from Locality P3855 which agree in every 

 respect with the figured and type specimens of this species. Seeds of this character are at present 

 knowTi only from the Medicine Bow and Lance formations of Wyoming. 



The botanical afiinities of this nominal species are still unknown. 



OccwrreMce— Locality P3855. 



Colleclion—\]. C. Mus. Pal., Nos. 2579, 2583, 2583a (counterpart). 



Carpites sp. 

 (Plate 17, Fig. 8) 



The figured specimen shows a small, rounded cast of a fruit (?), which is marked by four 

 prominent ridges dividing the cast into four equal segmehts. It is possible that the fossil may 

 originallj' have been a partially split husk. It has not been possible to determine its botanical 

 affinities. 



To my knowledge there is no record of fossil fruits or seeds with which the present specimen 

 may be compared. 



Occurrence — Locality P3854. 



Collection—V. C. Mus. Pal., No. 2580. 



Carpites sp. 

 (Plate 17, Fig. 11) 



This specimen is a flattcned impression of a rounded body, poasibly a fruit, extended at both 

 ends into wedge-shaped, ribbed prolongations. The prolongation is larger at one end of the body 

 than at the other. Within a thin rim the central body is almost perfectly circular and is faintly 

 marked by meridional lines. The botanical affinities of this form are unknown, as are also any 

 previous fossil records of comparable rcmains. 



Occurrence — Locality P3855. 



Collection~\J. C. Mus. Pal., No. 2581. 



Palseoaster inquirenda Knowlton 

 (Plate 17, Fig. 19) 



Palxoaster inquirenda Knowlton, U. S. Geol. Surv. Prof. Paper 101, 278, pl. 49, figs. 5, 6, 1917. Dorf, Carnegie 

 Inst. Wash. Pub. No. 508, pt. I, 77, pl. 19, figs. 3, 6, 1938; Bull. Geol. Soc. Amer., vol. 51, 218, 222, 225, 

 1940. 



Palxoasterl similis Knowlton, U. S. Geol. Surv. Prof. Paper 130, 168, pl. 24, figs. 10, 11, 1922. 



' Princeton UniverBity coUection, NoB. 21001-21004. 



