DESCRIPTION OF SI'ECIKS. J 93 



paliiijitcly ncna-d. Lower lateral nerves of two pairs, nearly at right 

 angles, the upper forked, the lowest simple, both curved liackward; lateral 

 primaries and secondaries at the same angle of divergence (35° to 40°), 

 parallel, and equidistant; the secondaries, four pairs, strong, opposite, branch- 

 ing on the lower side, craspedodrome with their diA'isions; nervilles at right 

 angles to the nerves, distinct. 



This fine species, with the characters of the gt-nus distinctly marked in 

 the nervation, is remarkable for the entire l)orders and the smooth surface of 

 the leaves. The secondaries are all opposite, a cliaracter more or less dis- 

 tinctly seen in the leaves of most of the species of Proto})hvllum, especially 

 in the upper secondaries. 



Habitat: Mankato, Minnesota. Conununicated l)\- I'rof. N. U. Wiu- 

 chell. 



Protophyllum denticulatum, sp. uov. 

 PI. XXXVI, Fig. 9. 



Leaf coriaceous, round or reniform, enlarged on tlic sides, truncate at 

 the base, minutely l)Ut sharply denticulate all around except at the base, 

 ])etioled; median nerve thick, percurrent; lateral primaries supra-basilar, 

 very open, the upper branched outside, the lower simple, thin, at right angles 

 to the midril); secondaries, four pairs, subopposite, more or less l)ranching, 

 craspedocb'ome with their divisions; nervilles at inght angles to the second- 

 aries, distinct, simple or forked ; areolation small, quadrate, prominent. 



The leaf measures transversely T"*", vei'tically S.S""". The borders are 

 mai-ked by sharp, minute teeth turned outside and entered l)v the lateral 

 nerves and their divisions, which are all ci-aspedodrome ; the base; is trun- 

 cate, entire. 



Habitat: Ten miles northeast of Delphos, Kansas. No. 41 S4 of tlie 

 collection of ]\Ir. 11. D. Lacoe. 



Protophyllum crassum, si>. uov. 

 PI. LXV, Fig. 4. 



Leaves small, roinid oi- oval, entire; median nerve thick, passing under 

 the border of the truncate l)ase; lowest pair of secondaries nuudi branched, 

 with one or two pairs of thinner, horizontal ones underneath, these simple 

 or branching. Secondaries e([uiilistant, parallel, very thick, craspedodrome, 

 the inferior Ijranidiing, the up[)er only simj)le; nervilles A'erv thick and 

 close, at right angles to the secondaries, j)arallel, simjdi-, rai'eh' forcing. 

 MON XVII 13 



