THE MARINE ALG.E OF NEW ENGLAND. 49 



/ 



sioiially fiMiiiil, ;nul in fliat cuso tlio sjxHirs may easily hf iiiistaKni f(»r si)t'( irs of 

 Chfftomorpha. 



11. RiPAKirM, lioih, Ilarv. IMiyc. liiit., PI, 32S. [R. saliiiuniy Kiitz.) 



Filaiiu'iits tU'ciinibent, i)ale ^reon, forming eiitaii;,^k'd masses, fur- 



iiislied with numerous short root-like branches, jrenerally consisting of 



but few cells, but sometimes elongated, filaments from .02" ' to .025""" 



in diameter, cells about as long as broad, or a little longer. PI. Ill, Fig. 2. 



Kastport, Maine; Xahant, Wood's lloll, ^lass., W. Ci. F.; New Haven, 



Conn., Prof. J). C. Eaton ; Europe. 



An alfja whiih is probaMy oonimou all alon^ the coast on Avood-woik an<I san<ly 

 rocks iH'twtHMi tide-niarks. It lornis thin li«;Iit-^reen masses on the siibstanco on 

 which it is •;io\vin<;. The root-like processes usually consist of not more than three or 

 four cells, and not unfre<iuently they fork. Distinj^uished at sight from the next by 

 its yellowish color. It often covers the ground at the base of .^jj(n7jn«, and it is found 

 nearer high-water mark than the next species. 



IJ. TORTUOSUM, Kiitz. [Conferva impJexa and tortuosa, Ilarv., Phyc. 

 T'l it., ri. r>4 a and b. — Chatomorpha tortuosa, Xer. Am. Bor.) 



Filaments dark green, very much curled and twisted, forming pros- 

 trate masses, diameter of filaments, .035"'" to .058""", cells about twice 

 as long as broad, branches few, short. 



Common all along the Xew England coast; Europe. 



The most common species of onr coast, recognized by its dark-green color, and by 

 the very much twisted tilaments which fonn woolly strata over other algic. Its favor- 

 it.- habitat is in tide-pools, where it is exposed at dead low water. 



li. KOCHIANUM, Kiitz. (Conferva arenosa, Crouan, Algues Marines du 

 Fiuistere, Xo. 355. — Conferva implexa, var., Alg. Scand., Xo. 187. — 

 Bhizoelonium Kochiannm^ Kiitz., in Le Jolis's Liste des Algues Marines 

 de Cherbourg.) 



Filaments i)ale yellow, forming loose masses of indetiuite extent, cells 

 .010-14'"™ broad by .030-54™™ long. 



On algic below low-water mark. Summer. 



Gloucester, Mass.; Nahant, Mas.s., Mr. Collins; Europe. 



Much finer than any of the species previonslj- mentioned, covering alga' with a deli- 

 cate pale-yellow fleece. It is apparently less common than our other two species, and 

 we have only found it once growing over Laminari(r ^mt below low-watermark, oft' 

 Niles's Beach, Gloucester. The species agrees with French s]»ecimens of/?. Korhianum 

 in the size and general appearance of the cells, but the root-like proc«'sses character- 

 istic of the present genus are not evident in our specimens, and the species is here re- 

 tained in lihizotlomum on the authority of Kiitzing, in Le Jolis's List** des Algues Ma- 

 rines de Cherbourg. Jl. Kochianiim is considered by Kabenhorst to be a variety of 11. 

 flaricann, J'irg., in which he also inchnles Conferva arenicola of Iterk. Our sp<'(imens 

 agree perfectly with No. '.ii^y of Cnuian's Algues Marine du Finistere, but arr rather 

 smaller than No, 1^7 of Areschoug's Alga^ Scandinavicjr, which is referretl with doubt 

 to Conferra arenosa. The name which we have adoj»ted refers our specimens without 

 donbt to French forms, but the identity with the genuine C. arvnona of British botan- 



