394 



MEMOIRS OF THE XEW YORK BOTAXICAL GARDEN 



"In composition and thickness these silts are similar to those described by Daw- 

 son [Geol. Surv. Canada, Ann. Eept. 1894, p. 251 B] and Drysdale [idem, Summary 

 Kept. 1912, p. 150] who found them near Ashcroft, underlain by an older boulder clay. 

 If this correlation be correct, the St. Eugene silts are interglacial. " 



From the foregoing it may be appreciated that the exact geo- 

 logic age of the silts in Avhieh the plant remains are included is, 

 apparently, an open question, as far as the results of field ob- 

 servations and studies are concerned, and that the correct de- 

 termination of the floral elements, and any conclusions or infer- 

 ences which may be deduced from them, may be important 

 factors in assisting to solve the problem of the age of the silts. 



Descriptions of specimens 

 SPERMATOPHYTA 

 Angiospermae 

 Monocotyledonae 



Monocotyledon (leaf ?) gen. et sp.f 



Plate 29, figure 1 



"Fragments of a large leaf, with obscure parallel nervation." 

 Hollick, Smnmary Eept. {loc. cit.), p. 133. 



This specimen is too fragmentary, and Avith characters too 

 obscurely defined, to admit of anything more than provisional 

 identification as the median portion of a large monocotyledonous 

 leaf, with parallel nervation. The margin is broken and irregu- 

 lar and shows obscure indications of filamentous or spiny proc- 

 esses, somewhat suggestive of "Spanish bayonet" {Yucca), or 

 a species of fan palm, such as is represented in the genus Neo- 

 ivashingtouia ; but apparently the leaf tissue was thinner than is 

 characteristic of these genera. 



Monocotyledon (culm or petiole?) gen. et sp.? 



Plate 29, figure 2 



"Fragment of a stem, with Avell-defined longitudinal stria- 

 tion." Hollick, Summary Kept. {loc. cit.), p. 133. 



This specimen apparently represents some hard part of a 

 monocotyledonous plant. Longitudinal striations are fine and 

 well defined. There are no indications of nodes or ligular at- 



