FKESH-W ATEU ALU.K OF Till. I .\IIKD STATES. <J1 



8. polymorphic, WOOD. 



S. cfllulis fusiforniibu.s, aut ovalilms aut rllipticis aut globotus, singulis aut 2-8 conjunct is, 

 plfruiuijuv uirmjur julu aculfu uniro, inii-nluiu aculris duolius, iii.-iruclis : apicibus obtusJB, 

 acutix, Tul acutisaiuii.i ; aculvis gracillimiii, rtctis, uuxlicu clongatis, iucliuutis. 



Syn.S. polymorjJiu*. WOOD. Prodroiuus. Proc. Am. Pbiloft. Soc., 1869, p. 135. 

 Hob. In aquis quietis propo Caradcn, New Jersey. 



8. cells fusiform, or oval, or elliptic, or globose, single or 2-7 conjoined, furnished in moat 

 cues with a single spine, simiciiiiu'K 2, at each end ; ends obtuse, acute, or very acute; spines 

 exceedingly slender and acute, straight, moderately lung, inclined. 



/;*. Tli is plant was found in a quiet pool, filling the water in such num- 

 as to make it opaque and very green. The color of the cells, as first obtained, 

 under the niic -roM-npr, was a vivid green, but, the water containing them having 

 been plan-d iii a di>h, during the slow desiccation which followed the color of the 

 crlN changed to a golden yellow. 



Fig. 1 , pi. 1 1 , represents different forms of this species magnified 450 diameters. 



8. quadricatida, i.Ti WIN) Bate. 



llulis oblongo-oyliudricis, utroquc polo obtuse rotundatis, 2-4-8 arctissime conjunctis, 

 ordini- aut -iiiipliri recto aut duplicc alternante, omnibus rectis, medianis inermibug vel bis 

 illisve apice uno allerove aculeo eurvato instruct!*, extimis utroque apice sepius item dorso 

 armatis. 



'i 0.00035" 0.00039"; long. 0.00091". 

 Syn. ,S. quadrirauda, (TuRPiN) BR&B. RABEnnoarr, Flora Europ. Algar., Sect. III. p. 85. 



///(. Illinilf I-land, Bailey. Pennsylvania, Wood. 



(YIU oblong-cylindrical, obtusely rounded at each end, 2-48 very closely conjoined either in a 

 single straight series or a double alternating one, all straight, the median unarmed or some of 

 tin-in with the apex furnished with a curved spine, the external with both apices and some- 

 times the dorsum thus armed. 



Remark. Fig. 2, pi. 11, represents this species magnified 750 diameters. 



8. rolundatiiM, WOOD, (sp. nor.) 



8. cellulig globosis rel rabgloboain, spinnlis longtasimis, rectis, gracillimis, acntissimw, 3-6 

 armatit, aut tingulis aut genii n is aut 3-4 arete duplicc conjunct is. 



Diam.,^" to iJn". 



Hab. In aqnis quietis prope Philadelphia. (Dr. Chapman.) 



Cells globose or snbglobose, armed with three to five very long, slender, acute, straight spines, 

 single or in pair*, or three to four closely conjoined in a twofold rank. 



Remark*. The cells of this species are globular, and, when more than two, 

 they are arranged in two rows placed at right angles one to the other. The con- 

 tents of the cells are markedly granular, and the endochrome a bluish-green, and 

 trmn the surface of the walls project outwards, very long and fine, rigid hair-like 

 spines. 



It seems scarcely correct to place this plant in the genus Soenesdcsmu*, but I do 



