REVIEWS. 
347 
character, insomuch that the Long Island flora has much in common with 
that of the Adriatic. Between Boston and Eastport all the predominating 
species are of the Scandinavian type, with the exception of Agarum 
Turneri and Callithamnion Pylaisii : these do not occur in Europe. The fact 
that Phleeospora subarticulata and P. tortilis, as well as several other plants 
common in Norway, have not yet "been found on the New England coast, 
indicates that its Algae have not been exhaustively examined. The absence 
of any members of the Dictyotaceae, and of several Florideae common 
in England, e.g. Bonnemaisonia asparagoides and JPlocamium coccineum, is 
very remarkable. The genus Nitophyllum, too, is practically unknown any- 
where on that portion of the Atlantic coast ; and Gelidium corneum, a most 
variable species found in almost all parts of the world, is only occasionally 
met with, and then in the form separated by some algologists as a distinct 
species under the name of G. crinale. Of other Algae, Fucus canaliculatus , 
Himantholia lorea, the common European Cystoseirce, and Codium tomen- 
tosum , are wanting, and Fucus serratus is very rare. On the other hand, 
some species, such as Cliordaria divaricata, Spyridia Jilamentosa, and Futhora 
cristata, are more abundant on the coasts of New England than in Europe. 
The influence of warmth on the determination of the character of 
the flora is well illustrated by the occurrence of the southern species, 
Bhabdonia tenera, Gracilaria multipartita , Chondria Baileyana, &c., in 
Goose Cove, an inlet dammed up at the entrance and only overflowed at 
high tides, and surrounded by an arctic flora on both sides, but in which 
the water is much warmer than that of the surrounding ocean. The plants 
must therefore have been carried over the dam by the tide, and grown in the 
cove simply because the water was sufficiently warm, in the same manner 
that in this country Mediterranean species are seen to be almost confined to 
sunny, shallow pools, where the water soon becomes of a temperature exceed- 
ing that of the deeper pools and of the neighbouring sea. But enough has 
been said to show the extreme interest of this portion of the work. 
The systematic part, which naturally occupies the bulk of the report, is 
enriched by numerous explanatory notes, which exhibit not only an accurate 
acquaintance with the habits of the species in their own haunts, but an 
extended knowledge of the literature of each plant. Although the 
synonymy is very limited, it is sufficiently full to enable the reader to 
recognize the plants under the new names, where these have been altered 
during the last twenty years. In a few cases, but chiefly in those in which 
the author has not been able to examine living specimens of the plants, the 
most recent information is omitted ; thus Fctocarpus brachiatus, Harv., has 
lately been referred to the genus Phlceospora by Bornet, and Chcetopteris 
plumosa has been shown by Kjellman to have both unilocular and pluri- 
locular sporangia on special branchlets, sometimes on the same and sometimes 
on distinct individuals; hence the statement that it has the unilocular 
sporangia on the ordinary branches must be incorrect, and can only refer 
to another plant resembling it in appearance, but which differs also in the 
absence of a distinct cortical layer in the stem. 
The analyses of the genera and families at the commencement of each 
group, as well as the list of works consulted, form a useful addition ; and 
the fifteen plates at the end of the Beport, although somewhat crude in 
