THE MARINE ALG.E OF NEW ENGLAND. 95 



glands, passing abruptly into a broadly ovate or cordate lamina, which 

 splits up into a few broad segments ; substance thick, color blackish. 



Deep water. 



Peak's Island, Maine ; Gloucester, Mass. 



Distinguished from the last by its short, thick stipe, which is furnished with 

 muciparous glands, and which terminates abruptly in a broad, thick lamina, which is 

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

 sionally found washed ashore in the autumn, but is always much less common than 

 the last species. Le Jolis considers that L. platrjmeris is, at least in part, the same as 

 his L. flcxicaiilis; but what seems to us to be the true L. platymeris differs from L. flexi- 

 caitlis in having muciparous glands iu the stipe, a peculiarity which, according to Le 

 Jolis, is found iu L. Cloustoni, but not in L. Jlexicaulis. 



SACCORHIZA, He la Pyl. 



(From aaKKog, a sack, and pi^a, a root.) 



Fronds attached at first by a disk-like base, from which are given 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 differing from Laminaria principally in the form of the baial attachment 

 and in the presence of cryptostomata on both surfaces of the frond. The typical 

 species, S. bulbosa, not fouud on our coast, is attached by a sack-like base, and the 

 fruit is borue on the marginal upper portion of the stipe. In the present genus were 

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

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

 Laminaria, as L. solidungnla, in which the base is a disk, and our own species S. derma- 

 todea, although iu its younger stages attached by a disk, soon has a series of short 

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

 small pits sunk in the surface of the frond, from which arise groups of hairs, as in 

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

 with age. 



S. dekmatodea, De la Pyl. (Laminaria dermatodea, De la Pyl., Ann. 

 Sciences, 1. c, PL 9 g, non Agardh nee Harvey. — L. lorea, Ag. Spec. ; 

 Harvey, in Ner. Am. Bor.) 



Exs. — Algce Am. Bor., Farlow, Anderson & Eaton, Xo. 120. 



Fronds usually gregarious, base at first discoidal, afterwards with a 

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

 long, compressed, 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 .15 mm long; sporangia .12 ram long 

 by .02 mm broad. 



From Marblehead, Mass., northward. 



A characteristic species of the North Atlantic. Its southernmost limit is Marblehead, 

 where only one specimen has been collected. It is less rare at Gloucester, and is rather 



