Tin: marim: alg.e of xi:\v kncjland. 55 



tailoring branclilots ; cells .02-S™"' in diaiiU'tiT. tliosc of the iiiain 

 hraiichos many times lon«rer than broad. 



On stones and coverinir al;^;i,' just l)elo\v low -water mark. Summer. 



Jackson Ferry, X. Y., llarvcij ; Wood's lloll, Mass. ; Europe. 



One of X\\v ltm;4rst Init at tho saino time most drlicato of the «;<'ims. It forms iii- 

 Tiicatfly luamliiuL; tufts, one or two fe<'t loii;^, attached to stones, or eovers with a soft 

 lUeee alj^a' and Zo^tvra ^rowin;; in still, shallow hays, lik(^ the Little Ilarhor at WcmkI's 

 lloll. It is more or less {gelatinous and at once eollapses on hein;; removed from tho 

 vater and aillu-ns elosely to paper in dryinj;. In drying the colls shrivel very nnieh, 

 and the coloring matter is collected at the ends of the cells, which, in the main 

 branches, are much hmger than broad, and on moistening tho cells do not recover 

 their shape as n-adily as in other species. 



C. GRACILIS, (Gritr.) Kutz. 



Filaments loosely tufted, 3-12 inelies lon<i-. irregularly bent, i)rovi<led 

 It the angles with rather short branches, which are pectinate, with lon^ 

 recurved or incurved branchletsj color a yellowish green; cells .()i~l(j""" 

 in diameter. 



On wharves or in muddy pools. 



New Haven. Prof. Eaton; Wood's IIoll, Mass. 



a. Var. EXPANSA. 



Yen* irregularly branched, forming masses one to two feet in extent. 



Muddy pools. 



3. Gloucester, Xahant, Mass. 



Var. TENUIS, Thuret. [CI. vadorum, Aresch.) 



Branches reniote, filaments more slender than in the type, .04-8™™ iu 



diameter. 



Growing over Laniinaricc. 



Gloucester. .' 



A comm(»n and variable species, growing in rather muddy sheltered places an«l not 

 on exjyoscd sp(»ts. In its typical form it is recognized by its very irregular branches, 

 which are more divergent than in most other species, and by its pectinate branchlets, 

 which are at times llabellate. The species, although rather delicate iu substance, is 

 much stouter than C. albiila or C. (/laiiceiicens, and does not adhere well to paper. The 

 form which we have referred to, var. ^'/JMl^, Thuret, is d(uibtful. It formed masses of 

 indetinile extent on Laminarur and other algie below low-water mark olV Niles's 

 Beach, (ilonc ster. What wc have calletl var. rj-panxa resembles somewhat C. expansa, 

 Kiitz., and like it is found in uuidily places. It does not, however, form the dense 

 masses of the last-named species, but lioats loosely in the water in shallow places. 

 The ordinary fonns of the species are recognized without much diffi<ulty, but one 

 sometimes meets forms which are long and almost denuded of branches, in which case 

 detemiination is dilUcult. 



C. EXPANSA, Kiitz. 



Filaments of a dull-green color, at first tutted, then matted togethei-, 

 forming extensive strata; main branches irregularly flexuous, .10-Lj""" 



