Tin: MARINE ALG.E OF NEW ENGLAND. 53 



given oil al an acnto an«rlo; cells with delicate cell wall, .0;>-G'""' in 

 jliameter, terminal cells acnte. 



On stones and wood-work near low-water mark. Smniiier. 



From Halifax, X. 8., to Charleston, S. C, Harvey; Newport, W. I.; 

 Kurope. 



A iloHcute sprcii's wiiith is cliarattoii/rd l>y its li^lit color, loosely tiiftid hal»it, an«l 

 sli'uder branches, which arc all j^ivon off at uniformly acute aui^les. When growinj; 

 in exposed localities the tufts are short, hut in cpiiet bays they become lonjx and loose. 

 This species, which has the light color and slender lilaments of C. alb'uhi, dilVers from 

 that species in not being spongy in consistence and in the length of the ultimate 

 branchlets, which are always erect. Our Newport species resemble vt-ry closely the 

 No. 1*20 6 of Witt rock and Nonlstedt, Alg;e Scandinavicic, which is considere<l by them 

 a form of C. cn/s/a/Znuj, (Kotli), but diti'ers from the CI. cryxtaUina of the algologists 

 of .<t)uthern Europe. It may be remarked that CI. (jhiKrcxcens, (GritV. ) Harv., has been 

 ivferre»l to other older species, but not knowing the limits of C. cri/ntaUina, (Koth), and 

 C. serkta, (Huds.), we have adhered to the latter name, as has also been done by Le 

 Jolis and other French algologists. This species generally becomes very pale in drying 

 an<l adheres well to pai)er. 



The variety ,3, pccthnUa, of this species, mentioned by Harvey in the Nereis Am. 

 lior. as occurring in Charleston Harbor, is not know n on our northern coast. In the 

 variety the branches are said to be recurved. 



C. L^TEVIEENS, (Dillw.) Harv., Alg. Danmon., Xo. 142; Phyc. lirit., 

 ri. 190. 



Filaments mneli branched, rigid, forming loose tnfts 3-G inches long, 

 color a yellowisli green; branches fastigiate, erect, often opposite or 

 in threes, nltimate branches secnnd, of few cells, apex obtnse; di- 

 ameter of cells .03-.15'"'". 



In tide-pools. 



New York Bay; Boston, Harvey ; Gloucester, Mass., Mrs Davis, 



A rather robust species, recognized by the denseness of the branches, which arc 

 ;.»wded at the tips. Less robust and ditfering from C. Hiitchiusiw in having fastigi- 

 ate branches. We have only seen one specimen, collected by Mrs. Davis, which cor- 

 responiled exactly to the C. latcvircns of Alga; Danmonienses and to the C. latevlrena 

 of the Nenis Am. Bor. It is doubtful whether the forms to which the same name has 

 been given by French botanists belong to the same species as our own. Some of them, 

 at least, appear to belong to a more slender and less densely branching species. The 

 s[K*cies does not adhere well to paper in drying. 



C. HUTCHINSI.T2, (Dillw.) KUtz. {CI. Huhhiu.siiv, Phyc. lirit., PI. 

 li'l.— a. diffusa, Uarv., Phyc. Brit., PI. 130.) 



Filaments rigid, glaucous green, tiexuous, forming loose tufts G-12 

 inches long ; branches .sr-attered, rather distant ; ultimate branches 

 few, short, secnnd ; cells .10-1*4"'"> in diameter. 



In tide-pools. 



Gloucester, Mass., Mrs. Davis. 



A single specimen which seems unmistakably to belong to this species was collected 

 by Mrs. Davis. The species, which is one of the coarsest on the coa<it, is distinguished 



