254 • MESOZOIC FLORAS OF UNITED STATES. 



NiLSONiA? sAMBXJCENsis Ward n. sp." 

 PL LXVII, Fig. 8. 



In the collections from the Shasta group of California several imprints 

 of a plant were found whose character is doubtful. It seems to be most 

 like a Nilsonia. The imprints are in the form of segments that are 

 detached from the midrib. Fragments detached in a similar manner 

 were common in the case of N. schaumhurgensis (Dunk.) Nath., which is 

 an abundant plant in the Geyser beds (see p. 308). The specimen 

 represented in PL LXVII, Fig. 8, is one of these segments. It is wider 

 and longer than the segments of A^. schaumhurgensis, being 2 cm. wide 

 and 15 mm. long. The nerves are fine, numerous, and closely placed. 

 They are, as in Nilsonia, single and parallel. The material is too scanty 

 and imperfect to permit the positive determination of this fossil. It may 

 be a large form of N . schaimiburgensis, for the specimens of this plant 

 from the Gej^ser strata show some forms that are larger than any 

 hitherto described. It is, except in size, exactly like some of the detached 

 segments of the Geyser fossils. 



The plant occurs at localities Nos. 9, 18, and 19. 



Genus PTEROPHYLLUM Biongniart. 



Pterophyllum ? LOWRYANUM Ward n. sp.* 



PL LXVII, Fig. 9. 



A fragment of a detached leaflet of what seems to have been a very 

 large Pterophjdlum was found at locality No. 19. As the base of the 

 leaflet was not seen the determination of this fossil can not be positive. 

 As, however, it agrees well with Pterophyllum, I place it provisionally 

 in that genus. The terminal portion is well preserved and has the 

 character given in Fig. 38. The portion obtained is 4 cm. wide in its 

 widest part and 115 mm. long, and this is clearly only a portion of the 

 original leaflet. It is ensiform in shape, -with the anterior margin nearly 

 straight and the posterior rounded off in an elliptical manner so that the 

 tip is subacute. The nerves are very slender, parallel, and unbranched 



« Professor Fontaine assigned no specific name to this species. It seems best to have it bear one, and the one 

 chosen relates to Elder Creek, on which the specimen figured and several others were found. — L. F. W. 



I' The specific name given bj' Professor Fontaine to this plant had been twice used by others for different 

 species. I name it for Lowry, at which place it was found. — L. F. W. 



