TIIK MAKINi: AL(;.E OF NKW ENGLAND. 1.^3 



RatluT oonunon at Kastpoit, whrroit is often drtMljjt^d. It isalsofoiiiHl at low- water 

 mark during the sprin;^ tidi'S, es|K'tially on Clark's Ledgo. Small forms of what may 

 ho the same sjH'cies art* <Mca8ioually wa-slu'd ashore after storms as far south as Nahaiit. 

 The species is at once distinj;uishcd from all our other fonus hy the very numerous, 

 short, stout, cylindrieal hranehes. The conceptacles are external and contain two- 

 l>arted spores, which may possibly be later four-parted, although in the specimens wo 

 have examined they seeme<l to be (|uit»' mature. The <onceptacl»s, as far as could be 

 made out, had no distinct oritice, and were vcrv much tlattcned <'Xt«rnallv. 



ADDENDA. 



To follow iStilophordj page 80 : 



AIITIIROCLADIA, Duhy. 



Fronds olive-brown, filiform, branching;, composed of a large central 

 tihuiient formed of cylindrical cells and a series of pol.Ngonal cortical 

 cells, which become smaller towards the surface; plurilocular sporangia 

 moniliform, borne on branching monosiphonous filaments which form 

 tufts on the branches. 



A small genus, consisting of a single species, which has been divided byKiitzinu into 

 three, eharacterize<l by the tufts of monosiphonous filaments which bear the sporan- 

 gia, and which are arranged in whorls, gi-'.dng the fronds a nodose appearance. Har- 

 vey ami Agardh place the genus in the Sporo(}niacea\ while Le Jolis places it in a spe- 

 cial subonler of /*/*«yj*/»ort<r. 



A. VILLOSA, Doby. {SjwrocJnius viJlosus. Ag.. Sj). — Kluionnnn cil- 

 /o.sMWj, lierk.) 



Fronds six inches to three feet long, delicately filiform, with a i»er- 

 current axis and usually opposite, widely spreading, 1-2 oppositely pin- 

 nate branches : fructiferous filaments byssoid, in dense penicillate tufts 

 which form irregular whorls ; plurilocular sporangia mcniiliform, com- 

 l)osed of numerous cells, about 15-20 in a row, generally secund on the 

 branches of fructiferous filament ; unilocular sporangia ? 



Washed ashore at Falmouth Heights, Mass., Mr. F. T. Collins ; Cape 

 Fear. 



A rare species, only known on the New England coast from the siiecimens collected 

 by Mr. Collins, w Inch were rather smaller than European specimens. The species bears 

 a more or less considerable r«-semb!auce to I)enmari»tia riridix, but tin* penicillate tufts 

 are more regularly arranged in whorls, an<l bear the sporangia, which is not the case 

 in the genus Defftnarmtia. 



To follow Lynfjhya, page 34: 



SYMPUKA, Kiitz. 

 Filaments as in Lynyhya^ but adhering to one another in fascicles. 



Scarcely distinct from Lyngbya except in the existence of a mass of jidly, by means 

 of which the filaments adhere to one another in meshes. In habit the sjiccirs of tho 



