FIG. 5 
PLATE XXIV. 
THYRSOPTERIS VIRGINICA, SP. NOV.---- 2-206 seeece cone ---- ene => 
. Fragment of an ultimate pinna-.--......-.. 22. see eee 220 = oe eon nee one none 
18, Fragment 1 magnified.......-.-..---- ------ ---- --- 2-2 20 oe oe ee ee ee ee ee ee eee 
FIG. 2. PECOPTERIS VIRGINIENSIS, Sp. NOV- ------ ---- -- ---- 200-00 ne oc cece corcen -oee 
2. Fragment of an ultimate pinna -.-..--.---.-.-.---------- +--+ -----+---------- 
28, Portion of a pinnule magnified, to show nervation ..-.----.----.---------- eae 
FIG. 3. THYRSOPTERIS ELLIPTICA, Sp: NOV..---- ~~~ co cens cone ence caenee cose~-s0---= 
3. Portion of a compound pinna-. ....-- .. 2... 2. --- 22 - wana n cece ne coon ne 2-5 = on === 
Ses PEITINYe/OL eS NAL MICA a ose oie miele loa) einim ote aim = =m elena were ole oem mel aol 
Fics. 4,6, 7,9. THYRSOPTERIS DENTATA, 8). NOV-..-------------- 2-2-2 + one oe mone enna ne con nne 
4. Portion of the summit of a compound pinna.. .....--..----.-------- PpEpos Anse 
6. Portion of the lower part of a compound pinna........-.-....---.------------ 
6% elower pinnule macnn ied esac csr s-aalee se ese oe Cente am) aastele mittee 
6>. Upper pinnule magnified .. .... ...... -. - 22 enee cee eee ee ene cree cee ene woe 
7. Tip of an ultimate pinna. .... -.-- --2- 2. 22 none woe wn neon anne ewe n ne one e -=-= == 
725 PINNULOMMA PME rertes a latelm alee ao etelataa an =a Saami e la aia ale 
9. Portions of several detached ultimate pinne........ 2.2.2. 22522. een eee acne 
92, Lower pinnule magnified ...........- -.-. ---- 2-2 -- + oon oe wo oe on eon new wn ee 
Ody (Upper pinnule magnied ==. —- 2. 2m mo a lecle am wie om alan ete alate aaa 
IGS. 5,10. THYRSOPTERIS BREVIFOLIA, Sp. NOV....-------.------ ------ ------ -- eoee oe === 
5. Portion of a compound pinna slightly restored... .-..-.--..------------------- 
GOaGEL Tinie rable! SAA n S8oq 5 pea eeS econ pdoccHooos noon coc seca saree esoaeocoas 
58, From the lower part of the frond... .-.--- 0... <8 -. coe eee n= = -- == === 
Ae Jonah) so Gl S65 angscecnEnee ceesco Sano cose pSH0 BoOCas coca Chbeescascosea 
5co EM romithe tipper pPabuslaees see eee = ee een eae leae == ae eae 
5¢. Terminal pinnules of a pinna-..-....---- .- 22 2c 20 oe ween ene enn > =-==~-= === 
10. Tip of an ultimate pinna..---.....--- 2-2-2 222-22 eo - ooo ne = wee === 
Fic. 8. ASPIDIUM PARVIFOLIUM, Sp: NOV ---- 2. ~ 2.0 oo noc nw cle cwes cee eems====s == m=5 
8. Portion of a compound pinna from the upper part of the frond.-......--------- 
S2 Pinnnlemapnitied ceases aan sen aaa ne alee fel a aloenelene me (= == AQ000DTEO450 
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