1«!0.] ^"^l [Wood. 



ORD. NEMATOPHYCEAE. 

 FAM. ULVACEAE. 

 GEN. SCHIZOMERIS. 



S. XiEIBLEINII. Ktz. ? 



See Proc. Biolog. and Microsc. Deijartment, Ac. Nat. Sc. 1868, p. 12. 

 FAM. OEDOGONIACEAE. 



O. MIRABILE. 8p. Nov. 



O. gynandrum, rare setigerum ; articulis diametro 2-8 plo longiori- 

 bus ; oogoniis plerumque singulis, rare geminis, nonnihil ovatis, infra 

 latis sed supra contractis et medio tumidis ; poris lateralibus duobus 

 supra medium positis ; oosporis aut late ovalibus aut subglobosis ; 

 spoi'odermate baud signato ; antheridiis plerumque bicellularibus, inter- 

 dum tricebularibus, plervimque in filo vegetative infra oogonium aut in 

 obgonio insidentibus; spermatozoideis singulis et geminis. 



O. gynandrous, rarely setigerous ; articles 2-8 times longer than 

 broad ; oosporangia mostly single, rarely geminate, subovate, in the lower 

 portion broad, in the middle swollen, in upper part contracted ; the 2 lat- 

 eral pores situated above the middle ; oospore su.bglobose or broadly ovate ; 

 it coats without markings ; antheridia generally bicellular, sometimes 

 tricellular, numerous, placed generally upon the female filament either 

 upon or below the oosporangia. 



Diam. Artie, veget. ysVo'-rHo''^- 0004-001 7. Spor. yi 8^//-^|o^'/=.0024'' 

 -0027". 



H. ab. In rivulis quietis prope Philadelphia. 



o. HUNTii. Wood. (Ainerican Naturalist.) 

 Hab. In aquario meo. 



O. INEQUALE. Sp. NoV. 



O. dioicum ; cellula basali biloba ; plantis femines quam plantis 

 masculis permulto majoribus; oogoniis enormiter globosis vel subovoideis, 

 poro laterale supra medium posito instructis ; oosporis forma eadem, sed 

 paulo minoribus. 



O. dioecious, basal cell bilobate ; feminine plant very much larger 

 than the male plant ; oosporangium irregularly globose or subovoidal, 

 opening by a lateral pore above the middle ; resting spores of the same 

 form as the sporangium but a little smaller. 



Hab. In stagnis prope Philadelphia. 



O. MULTISPORUM. Sp, NoV . 



O. gynandrum ; oogoniis singulis, vel binis vel ternis continuis, 

 globosis ; pore laterale distale instructis ; oosporis globosis, oogonii lumen 

 replentibus; antheridiis plerumque pkiribus planta feminea insidentibus, 

 cellula inferiore raulto majore. 



0. gynandrous : oospoi-angia single or bi or triseriate, globose, about 



