THE MARINE ALO.E OF NEW ENGLAND. 95 



jrlaihis, passiu^ abruptly into a hroatlly ovate or cordate lamina, which 

 splits up into a few broiid seninents; sub.stanee thick, color bhukish. 



Deep water. 



Teak's Island, Maine: (lloucestiT. Mass. 



DistintrnisluMl from the last by its short, thitk stii»e, which is furnished with 

 anuciparons i^huuls, ami which terminates abruptly in a broa«l, thick lamina, which is 

 usually tlecitleiUy cordate at the base. It is an inhabitant of deep water, and is occa- 

 sionally found washed ashore in the autumn, but is alwaj's much less common than 

 the last species. Lo Jolis considers that L. platynurU is, at least in jiart, the same as 

 his L. flcxicauUs; but what seems to ns to be the true L. platymrrh difVers tVom L. fiexi- 

 cauUs in havin;; muciparous jjclands in the stipe, a peculiarity which, according to Le 

 Jolis. is found in L. Cloustoni, but not in L. JiexieauUs. 



SACCOKHIZA, De la Tyl. 



(From aaKKor, a sack, and /'u,'a, a root.) 



Fronds attached at first by a disk-like base, from which are <^iven off" 

 later a few short root-like fibers; stipe compressed, plane, gradually 

 passing into a ribless lamina; cryptostomata scattered on both sides of 

 the frond; fruit as in Laminaria. 



A genus ditfering from Laminaria principally in the form of the ba al attachment 

 and in the presence of cryi)tostomata on both surfaces of the frond. The typical 

 species, N. biilbosaj not found on our coast, is attached by a sack-like base, and the 

 fruit is borne on the marginal upper portion of the stipe. In the present geniis were 

 at one time included all the Laminarias whose attachment is discoidal rather than by 

 branching root-like libers. There are, however, forms still retained in the genus 

 Liiminaria, as L. solidiingula, in which the base is a disk, and our own species ^. derma- 

 toiha, although in its younger stages attached by a disk, soon h.is a series of short 

 fibers, which, as the plant increases in size, become branched. The cryptostomata are 

 small i»its sunk in the surface of the frond, from which arise groups of hairs, as in 

 the Fucacca^. They are visible to the naked eye in the young plants, but disappear 

 ■with age. 



S. DERMATODEA, De la Pyl. {Laminaria dermatoflca, De la PyL. Ann. 

 Sciences, 1. c, PI. 9 </, non Agardh nee Harvey. — L. lorca, Ag. Spec; 

 Harvey, in Xer. Am. Bor.) 



Exs. — Algii? Am. Bor., Farlow, Anderson «5s: Eaton, Xo. 1L*(>. 



I'ronds usually gregarious, base at first discoidal, afterwards with a 

 whorl of short, thick, usually simple fibers; stipe six inches to two feet 

 long, compres.sed, gradually expanding into a thick, coriaceous-lanceo- 

 late or lance-ovate lamina, one to six feet long, six to eighteen inches 

 wide, at first entire, but afterwards torn above into several segments; 

 fruit in scattered sori, which become confluent at the base of the frond; 

 paraphyses narrowly club-shaped, about. 13'"'" long: si>orangia .iL""" long 

 by .OJ"'"' broad. 



Prom Marblehead, Mass., northwanl. 



-V characteristic species of the North .\tlantic. Its southernmost limit is Marblehead, 

 ^rhcro only one specimeu has been collected. It U less rare at Gloucester, and is rathei* 



