FRESH-W A TKK A L li .K OF T II K f N I T K I> STATES. 77 



Fig. 4 a, pi. 9, represents a frond of this plant magnified 125 diameters; fig. 4 6, 

 a fragment magnitinl Jiiil diameters. 



Profe>sor Hailey, in Ameriran Journal of Scienees, vol. iii., new series, states 

 that he has found two species of the genus Stii/<>n< nm, namely, St. atrorirens, A.G. 

 and St. iintiiunilli^inn, Ac. ; tlie former growing on wet rocks at Indian Falls, 

 Putnam Comity, New York ; the latter at Round Pond, near West Point. I have 

 no personal knowledge of the genus, but, according to authorities, it belongs to 

 tin- lirhens rather than the alga?, apothecia having been detected in various 

 ies. 



CLASS CIILOKOPIIYLLACEJE. 1 



I*liiiitiiln> a<|iiatira> vd aercie, uni-, bi-, vel multicellulares, aut singulae 

 uut eonsoeiatu 1 , fainilias foniuintcs. 



\' : /tfiitin tenniiialis \d non tenninalis. 



l;<unijir<it!n aut nulla aut vera, sed ccllularum non divisione, potius 

 prolificatione. 



Ci/innl, nun non siliccum, combustibilc, saepius e stratis successivis 

 -iiiii|M.>i(iiin, Mili-tantiaiu irrlatinosam pleruinque liquidam exsudans. 



( 'i/tin/Jii^ma chlorophyllosum, chlorophylli loco nonnunquam erythrino 

 \el sultaiitia (ilciisa coccinea, carnea aut rufescente coloratura, nuclco 

 (centiali vel lateral!) plerumque prseditum, granulis amylaceis rarissirae 

 evens. 



ijih'i-iiti'n fit cellularum divisione vegetativa. Foecundatio ple- 

 scxiialis. 



iu lit aut oosporis vel zygosporis aut gonidiis tranquillis vel 

 agilibus. 



Aquatic or aerial uni-, bi-, or multicellular plants occurring singly, or 

 consociated in families. 



Vegetation terminal or not so. 



/'randies either wanting, or if present, true branches, although formed 

 rather by a process of proliferation than division of the cells. 



< 'i/tntlerm not siliceous, combustible, often composed of successive 

 strata. 



Cytioplasm chlorophyllous, sometimes colored by an oily crimson, flesh- 

 colored or yellowish-red substance, in the place of the chlorophyl, gene- 

 rally furnished with a nucleus (either lateral or central), very rarely 

 without starch granules. Growth occurring by the division of the cells. 

 Fecundation generally sexual. 



/'/ <>/ i <t</>iiion taking place by oospores or zygospores, or by tranquil or 

 motile gonidias. 



1 The description of this Class and Order is that of Prof. Rubcnhorst. 



