Tin: MARINE ALG.E OF NEW ENGLAND. 47 



common in Lon;^ I.slan<l Sound, but is little known north of ('apt' Cod. It ^rows in 

 pools, somotimes near bijjh-water mark, and rt'sembles in habit ('. melagnnium, from 

 which it dithers in color, in bcinj; nnich less ri«;id, and in the smaller size of its cells. 

 As found on our coast, the lilameuts are rather more slender than the average of 

 European specimens. 



C. PiCQUOTiANA, (Mont.) Kiitz. {Conferva Picquotiann^ Ann. Scien. 

 Nat., 3d Ser., \o\. XI, \\. (»('». — Chaionwrpha Vlquotiana^ Nor. Am. Bor., 

 Part III, p. So, PL 40 c.) 



Filaments prostrate, intricately twisted together in masses, ri^id, 

 dark-green, eells .1*-- 4" ' broad by .2-1.0""" long, slightly oval in shape. 



Deep water, and washed ashore. 



Rather common from Boston northward ; St?ten Island, Harvey ; 

 Gay Head, Mass. 



This species was first described by Montaj;ne from specimens collected by Lamare- 

 Picquot in Labrador. It is ihe largest of our prostrate Chwtomorjyluv, and north of 

 Boston is not uncommon on beaches after a storm, but it has not been seen in tide-pools. 

 The localities South of Cape Cod perhaps need revision. "We have found the species 

 washed ashore at Gay Head, from deep water. It reminds one of C. melagonium by 

 its color, rigidity, and size of the lilameuts, and it seems to us probable that it is 

 merely an advanced stage of that species which has broken from its attachments and 

 become entangled without having lost its power of growth. It is certainly very 

 unlikely that any alga of this suborder is throughout its whole period of existence 

 unattached. The cells differ from those of C. melagonium in being sometimes several 

 times longer than broad, but, on the other hand, they frequently are found no longer 

 thiin broad. If the species is really distinct and not an older stage of C. melagonium, 

 as we suspect, it is the largest and coarsest of our species, and is to be compared with 

 (\ torulofia, Zan, of which we have examined specimens collected by Ilauck at Pirano, 

 in the Adriatic. In drying, our species does not adhere to i>aper, and the cells con- 

 tract at the joints so as to give a toruloid appearance. 



C. LiNUM, (Flor. Dan.) Kiitz. {Conferva Linumj Crouan, Algiies 

 Marines du Finistere, No. 3o3. — Conferva Linum, Areschoug, Alg. 

 Seand., No. 183. — Chatomorpha herbacea, Kiitz., in Hohenacker's Meeral- 

 gen. No. 355. — Cha:tomorpha Linum^ Kiitz., Spec. Alg., p. 378. — Cha:to- 

 morpha sutoria, (Berk.) Ilarv., Ner. Am. Bor., Part 3, p. 87. — Non 

 Conferva Linum, Alg. Danmou., No. 220, uec Ehizoclonium Linum^ 

 Herb. Thuret.) 



Filaments prostrate, intricately twisted together in masses, rigid, 

 bright green, cells .20-25"'°' broad by .20-30'"°' long, abont as broad as 

 long. 



Just below low-water mark. 



Common in Long Island Sound; Nahant, Ten Pound Island, Glou- 

 • ster, Mass.; Europe. 



Tho^onfusion which has arisen from the application of the name Conferva Linum to 

 different species and the useless multiplication of names, especially on the part of 

 Kiitzing, raakes it exceedingly ditlicult to ascertain the name of this common species 

 on our coast. It forms strata of considerable extent upon rocks and gravel just below 



