THE MARINE ALG.E OF NEW ENGLAND. 7 



an effect. Certainly, lihdhdonht toicra is <iiiite unknown in anv oilier s[>ot 

 north of Cape Cod, the nearest locality beiu^ the coast near Xanl iicket, 

 and it isverydillieult toconeeive that sporesof that delicate s])ecies would 

 survive in a very cold current, which not only must carry theui outside 

 of Cape Cod and across Massachusetts Bay, but also around to the shel- 

 tered cove at the i)oint where Cape Ann joins the mainland at the 

 north. If we compare the exceptional case of Goose Cove in the north 

 with Gay Head and ]\[ontauk in the south, it seems to be the rule that 

 wherever the water is cold enough, we meet arctic species, and wherever 

 it is warm enough we have Lon^ij;; Island species, regardless of the 

 remoteness of localities where the species naturally abound, and, as far 

 as we know, of the absence of currents to transport the si)ores. 



Our marine tiora is marked by the comi)lete absence of any members 

 of the order Dictyotacece. IlallHcris pohjpndwidcs has been found on the 

 coast of Xorth Carolina and, at Charleston, Padhia pavonla begins to 

 become common, but north of Xorfolk not a single si)ecies of the order 

 IS known, the northern species referred by Uarvey in the Xereis to the 

 Dictqotacecv being now known to belong to another order. Xor does 

 any species of TUopteris or Cutleria occur in Xew England. The ab- 

 sence of some of the common European genera of Florideoc is also wor- 

 thy of notice. The genus yifophyllum is entirely wanting north of 

 Xorth Carolina, and, although a species is said to have been collec- 

 ted oft' Cai)e Eear, and although X. occUatum is occasionally found 

 at Key West, this genus, which forms one of the more striking fea- 

 tures of the European flora, may be said to be practically almost un- 

 known anywhere on our Atlantic coast. Bonncmahonia afiparayt tides ^ 

 which occurs as far north as Norway, although rare, may perhai)s be 

 found with us. Xo species of Schizymenia or the related genera is found 

 with us although the w estern coast is perhaps too rich in species of 

 this peri)lexing group, riocamium coccincum, one of the commonest red 

 sea-weeds not only of Europe but of our west coast, is known with us 

 in only one doubtful case. GcUdium corncum, which is abundant in al- 

 most all i)arts of the world, is only occasionally found in Xew lOngland, 

 and then only in the reduced form, separated by some as a distinct species, 

 under the name of G. crinaJc. It may here be remarked that it is often 

 a ditlicult matter to determine whether some of the more beautiful sea- 

 weeds of Europe really occur with ns or not. Our amateur collectors 

 have fre(|uently exchanged with Euroi)ean collectors, and one not un- 

 frciiuently sees specimens o^ Plocamiuin cocci ncmn, Ciillopln/llis Utciiiiatu 

 and other European species prized for their beauty, which are said 

 to have been collected on our own coast. But inasnuich as no careful 

 collector has found tlic species in(iuestion, I liaveconsidcredit toounsafe 

 to accept the statements of amateurs who, to my knowledge, have re- 

 ceived specimens from Europe, and who, in general, are not accurate as 

 to dates and localities. The preceding remark will not, however, apply 

 to the species of Fucuh and the coarser sea-weeds. Fucxui serratus, very 



