148 EXPLORING EXPEDITION PEOM SANTA FE, ETC. 



once by the remarkably fine, uniform, parallel, simple veins given off at right angles 

 from the midrib. None of the specimens obtained in Sonora rival in size the huge 

 fronds obtained from the coal-beds of Richmond; but it is nevertheless the largest 

 Sonora species, and the largest specimens are folly equal to the average of those found 

 in Virginia. 



There are in the collection of Mr. Keniond many simple, narrow fronds, in which 

 the nervation is similar to that described above, and the only difference 1 can discover 

 between these and the larger ones is in the greater relative width of the rachis in the 

 narrow fronds. It is frequently as broad as in the larger ones, and is seen to be scaled 

 or chaff}' toward the base. These narrow fronds are contracted in width, and are more 

 Or less waved or ruffled. Possibly these may represent another species, but the differ- 

 ence between the two forms seems hardly sufficient to justify me in considering' them 



distinct. 



JeANPAULIA &ADIATA, Newb. 



Plate VIII, fig. (3. 



Fronds radiating from a common center and apparently forming a whorl. Each 

 subdivision has a wedge-shaped outline and is several times dichotomously branched. 

 The /(tciniir are nearly straight, flat, and marked by continuous parallel veins. 



Detached portions of this plant could hardly be distinguished from Jeanpaulia 

 Munsteriana, CJng., from the Kluetic beds of Bayreuth, as will be seen by the figure 

 now published. The subdivisions of the fronds, or perhaps the distinct fronds, are, 

 however, narrower and straighter than in that species. 



A large number of specimens of this plant occur in Mr. Remond's collection, and 

 some of them possibly represent the European species, being stronger and having 

 the snb-divisions more curved than in the specimen figured. 



It will be regarded as an interesting fact that a well-marked species of Jeanpatdia 

 is found in the Triassic of Sonora, and I have also to add that 1 have in my hands 

 Specimens which indicate the existence of another species of this genus, closely allied 

 to, if not identical with, J. Munsteriana in the Triassic coal-formation of China, They 

 were collected by Prof. R. Pumpelly. I have seen, too, a large and strong species, 

 perhaps new, from the coal-basin of Richmond, Ya., whence it was brought by Prof. 

 I). S. Martin. 



