105 



in F. liirn are from two to four times a- lari'e as tho-e of F. inminiji a i. From 



;;--, the present specie- i- -.-parated by it- rectangular, imt 



trules, the much 'jivater proportionate and ah-o'.ute width [' the tV-ii--tnil--. aiid tin.- -traL'ht, 

 not flexuous, branclu-. 



I have only seen a single specimen of /'. and that only exhibit- tl. 



'if the ccencecium ; but the p-neral characters of tin- frond art- so unlike any pn-vi..u-!y r 

 species of with which I am acquainted, that I have thought my-clf ju-titied in 



forming a new species for its reception. 



/. Corniferou- him- -stnm ,,(' |'. : < me. 



128. FENE-TKLI.A MAKCINAU- 



Polyzoary f<>rmin'_: a fan shaped expansion, of unknown diiii'-hMnnv Mranche- straight. 

 nearly parallel, about four in the space of two lines. I>i--e[,imeiit- ( xeeedinjy narrow. nm 

 more than one hundredth of an inch in width, slL'htly expanded at their point- of jiineti'.n 

 with the branche^. quite straight, and separated bv intervals of one line, slightly alternatin- 

 in contL'H"u- rows. No cells upon the dissepiment-. ! oblong, regularly red 



irular, nearly tv. Inn- as wide, (nearly one line in length and k--- tlian half a line in 



width) : three fenestrules in a ijuarter of an inch measured vertieallv. and tive in the -aine 

 space measured transversely. Two marginal rows of lar-e fla-k-ha] ed cells, bet \\.-en which 

 are two or sometimes three rows of minute elongated cells, which probably neeupied a c-u:ral 

 keel. Four lar^e cells to a fenestrule, and one at the origin of each di>sepiment. As in 

 case of the preceding Bpecies, I have only a .-in-le fra'_'inentarv example of this 

 character- are -n [ieculiar that I have no doubt as to its specific di-tinetii. ( iui -; fciinen 

 is one exhibiting tho back of the p lyznary. but the outer striated non-eelloliferous la. 

 been denuded, and the proximal ends of the cells are thus br"U_rht int-i view. 



In it- general fnnn / - arly 



a -.inline -h\\n l>y tlie -trai^ht 



lir.-niches, the di-tinct -trai-ht n. n cellulit't r 

 di--'-].iinents. it- rectan-ular ti-ne-trule-. and 

 possession of a row of large c.-ll- mi each rid 

 each branch. Tins la-t character -eparate- it t'rr>m 

 ]'"li/, /!. and the other- ili-tini:ui-h it I'PIIM / 



jiiif'i. Tlie >pecilne|| due- lint enable c- 'Virill 



with certainty that the two lateral rOWS oi 

 were separated bv a median keel, but it apj 

 hi'_'lilv probable that tlii- \va- the OM6, In the 



L'-nu- or >ub '.'i-nii- I ' i ' '' ' ;. the 



keel -eparatin- the t wn lateral r. I 



I 





'" 7'7!"| celk carrie- a central row ,-f miiiut In 



.)( 'a. ' ll (lirtlll ! !:[ 



nHdlui, howevi r, the -par. 



lateral n,v. .1- carrie- a -er,e- of minute 



closi-lv ct-owde.l cell-, which arc arranged in -eneral in twoalterna 1 



in three Tlii- charade,-. -,, far a- I am aware, ha- IP>I hitherto been ol in any 



of / .eept /'. V and it ma\. perhap-. alV'-rd a ground ot -ub 



_'eip-ric di-tinctioii If, a- i- mo-t probable, a median ke, i were ir. -i-nt. it mn-t h 

 diluted the openin-- of two or three P.\\ - o| minu' 



In it- '.'eip-ral form. /'. ll ' mi mhlam-e to ; 



dim. n- much -mall, r 'fhe former ha- I'oiir bran !,< 



ile- in a ijiiarliT of an inch m. a-ured tr.iti whil-t (In- d; 



lingly thin, and the length of 4 double the width < >n tl 



hand, in / there are three brain IP ' two hue-, and about 



trule^ in a quarter of an im-h IIP 



iiP-nf- ar-- about a- thick a- tin- branch.--, and tip- ! IP jtTU 



wide 



/, ' ' ! I'. 1 1 ( 'olb 



