THE MAKINE ALCi.K OT NEW ENGLAND. [)o 



larly of its basal portion; tho presi'mo or alisonco of a sorif s of altoniato ilt-jiressioim 

 and elevations within tho margin : and tho position of the frnit. The growing portion 

 of the Lamimina' is at the bast» of the lamina, and tho ni)ex of tho stipe and tlie old 

 fronds are pnshedot!" by the 114' wly formeil ones below. The fruit is perfecto«l in autumn 

 and winter. 



L. LONGiCKURis, De la Pyl. {L. longicruris, Ann. Sci., 1. c, V\. \) a 

 ami h ; Phyc. Brit., p. 330; Xor. Am. r»or., Vol. I, PI. 0.) 



Exs. — Aljxa^ Am. Bor., Fallow, Amlersou & Eaton, No. 117. 



Fronds solitary or gregarious, attached by numerous long, slender, 

 branching fibers; stipe six to twelve feet long, one to two inches thick, 

 slender and solid at the base, becoming hollow and intlated at the middle 

 and upper part, contracted at the apex; lamina ovate-lanceolate, five to 

 twenty feet long, two to three feet broad ; margin very wavy, within the 

 margin two rows of depressed spots ; fruit forming a continuous band 

 in the center of the frond ; color lightish brown ; substance rather 

 delicate. 



Common in deep water, and at Eastport at low- water mark. 



From Nahant, Mass., northward ; Xorth Atlantic and Arctic Oceans. 



A striking species, easily recognized when in typical condition, but unfortunately 

 variable, though not so much so as our other species. The root-libers are long, rather 

 slender, and much branched. The stipe is slender at the base, but expands gradually 

 upwanls until it is at times two inches in diameter. The greatest diameter is about 

 two-thirds of the way up the stipe, which is then contracted, sometimes quite suddenly. 

 When young and only a few inches long, the center of the stipe is filled with a solid 

 mass of delicate filaments, but it soon becomes hollow. When torn from their attach- 

 ments by storms, large specimens, in consequence of the hollow stipes, float in a pecu- 

 liar way, the upper part of the stipe projecting above the water like an elbow and tho 

 lamina dipping below tho surface. The lamina is, in comparison with the stipe, 

 shorter and broatler than in our other species. This is especially the case in young 

 specimens, where the stipe may be several times longer than tho lamina. In mature 

 plants, however, the comparative length of the lamina varies very much with tho 

 place of growth. The present species has never been certainly known to occur south 

 ! Cape Co<l. Specimens resembling L. saccharina, l)ut with hollow stipes, have been 

 •llected in Long Island Sound. Whether really belonging to L. longicruris is doubt- 

 ful, and the subject requires farther investigation. 



L. SACCHAKINA, (Linn.) Lam.x. ? 



Frond attached by numerous branching fibers ; stipe solid throughout, 

 terete, somewhat swollen iu the middle, three inches to four feet long ; 

 lamina elongateil, lanceolate, fusiform or cuneate at base, three to thirty 

 feet long, six to eighteen inches wide ; margin wavy, a row of depressions 

 on each side of lamina ; fruit forming a central band. 



Var. PUYLLiTis, Le Jol. {L. phylUtia^ Phyc. Brit., PI. 192.) 



Fronds small, lamina thin, margin slightly wavy, base of lamina fusi- 



•rm. 



