FLORA OF TIIK SHASTA FOKMATIO.N. 229 



aro small fi-a-monts of ulliinalc pinna^ ll.al l.avo a frw very characKM-istic 

 pinnules. This i.lant has s.ich dcci.lrd features that even small fra-ments 

 suffice to identify it. 



Cl.vdoimii.i'.ius ai..\ta Fontiiino? 

 Pi. lAV, Fi>;s. 17-21. 

 ISSU. Chdophhhhalata Font.: Pot. .mar Flora (Mono-r. T. S. (l.-,!. Surv.. Vol. XV), 



p. 77, pi. xix, figs, n, ■")!i. 

 ISS.) i'.rophvl^ siririlnrrH.^ Font.: Op. rit- p. SI, pi. xiii, I1.l:s. C. (la, 7, 7a, S, Sa; 

 pi. xix, figs. 9, 9a; pi. xx, tigs. H, :^a: pi. xxii, figs. i:!. i:!a: pi. <-lxx, ligs. ;>, 



.ia, f), 6a. 

 is9.t ClmhiMehl^ Inclirmta Font. ( in Dillor & Stanton: Bull. (icol. N,,-. An,., 



Vol. V, p. 4.50, c|uoa<l i\M. V. S. Nat. Mus., No. 3996. (f^l. PXV, Fig. l>1 .) 

 1S9-) [1S961 ChulopMeU^ IncUnala Font.? in Stanton: Bull. U. S. Geol. Surv., No. 



In the collections from the Shasta formation of California there are 

 many specimens that show only small bits of ferns. They are small 

 frao-ments of the ultimate pinnae of ferns that have pinnules of small 

 size of the tvpe of Pecopteris or Cladophlehis. They are not found 

 attached to a"rachis and are too imperfect to admit of positive determi- 

 nation. They clearlv l;)elong to several different species. All that can be 

 done in these cases is to name the plants with which they show most affinity. 

 Larger and better specimens are required to descril^e or to identify them. 



Numerous specimens of a small fern were found that have much 



resemblance to Cladophkhis (data Font. (Pecopteris stridinervh Von\.)r 



of the Lower Potomac beds of Virginia. The fragments show only bits 



of detached ultimate piinuc eaiTying a few, and mostly imi^erfect. pinnules. 



These can not be easily distinguished from those of P. strictimrvis, l>ut 



where the material is so imperfect positive identification can not be made. 



PI. LXV, Fig. 17, gives the termination of an ultimate pinna and 



is the inost perfect specimen found. Fig. 18 represents a small bit of 



an ultimate pinna, witli a few imperfect pimttiles of the largest size seen. 



Fig. 19 gives a fragment fi-om a similar portion of the frond, with pinmiles 



„f intermediate size. Fig. 20 represents the specimen formerly referred 



with doubt to Pecopteris striciinervis. 



The plant occurs in numerous specimens at locality No. 22, and m 

 only one or two at localities Nos. 9, 18, and 19. 



" See pp. l.').S~l()0. 



