.Illv'ASSIC FL()1;A of I)()l(iFAS ('orNTV. ()UE(i. ()7 



rather tliick coi-iaceou.s loxluro, atul, nol w ithstaiidiiig tli(> iVaiiinoiitary 

 (■ondition of the specimens, ai-e often \r\-y well preserved. The)- are 

 widest at base, attached li.\ the entire base, and often strongly falcate. In 

 terminal parts th(>y ai-e sometimes shorter, l(>ss falcate, and more trianirulai- 

 in form. They are in these parts more or less united, but usually are 

 separate to the base. Th(>y are acute to subacute. The nerves are very 

 distinct and are of the tyi)ical Cladophlebis type. The basal lateral 

 neives are twice forked. Those hisiher up are less copiously i)ranclie(l, 

 the highest being once foi'ked. Th(> bi'anches di\-erge strongl\- at first and 

 aiv then parallel, so that they appear rather straggling. 



This plant agrees \n\ well with the form described by Ileer from 

 the Jurassic of Sibeiia untler tlie nain(> Asjilcniinii wlutbicn.se Icnuc." It, is 

 nearest his variety a. as figured on pi. xvi, fig. S. 



As these ferns are not specifically identical with the original I'cniplcri.s 

 irhithicnsifi it seems best not to treat tlunn as a \-ariety of that species, and, 

 as they are without fructification, it is safest to refer them to the noncom- 

 mittal genus Cladophlel;)is. They are very much like the NeuroptcrU 

 rcccntior (Phill.) L. & H., figured by Lindley and Hutton,'' but the pin- 

 nules are usually much more acute than those given for the English plant. 

 It may Ije, however, that the l)luntness of those of the latter is due to 

 ■distortion or imperfect preservation, foi- a few of them are as acute as those 

 of the Oregon fossil and have exactly the same shape. 



Mr. Seward has been kind enough to send me, along with the names 

 of the plants figured, duplicates of the plates for his forthcoming work on 

 the Yorkshire Jiu-assic Plants. The plates were not accompanied 1)>- 

 descriptions, hence reference can be made only to the plates and figures. 

 The work will be referred to as "Yorkshire Jurassic Fossils." ' In his 

 paper entitled: "Notes on some Jiu'assic Plants in the Manchester 

 Museum," which deals with some of these plants, he has, on pp. 8-11, 

 brought together a large number of ferns of the ivldtbiensis type. In these 



" Fl. Foss. Arct., Vol. IV, Ft. II, pp. 38-40, pi. xvi, fig. 8. 



''Fos. Fl. Gt. Brit., Vol. I, pp. 19.5-196, pi. Ixviii. 



•'Tlic work wus not received in Amerieii till after Professor Fontaine's report had been completed and the 

 raanus<-ript and types sent by him to Washington in the spring of 1!)01. Copies arrived, however, heforo 

 the report had been embodied in this paper, and I have made free use of it in working ont the synonymy 

 and arranging the speeies in systematic order. A copy of it was placed in Professor Fontaine's hands, and 

 there has been considerable correspondence between us relative to critical points. The final decision in all 

 cases, as propo.sed or accepted by him, has been embodied in the terminology here introduced. In the i)rescnt; 

 case he has decided to make a new species, and left the work of naming it to me. — L. F. W. 



