460 



Mr Philip Sewell on the Flora of [sess. liii. 



were not so characteristic a feature as I had expected would 

 be the case. W. H. Wilkinson, Esq. of Birmingham, has 

 kindly taken in hand this difficult group. 



Marine Algce were doubtless numerous enough in the 

 neighbourhood of Vardd, despite the steeply sloping shores, 

 but for lack of experience in the collecting of these, I ob- 

 tained but a poorly representative number of species. These 

 Mr G. W. Traill of Joppa has very kindly named for me as 

 follows : — 



Bryopsis plumosa, Lx^ 

 Chorda lomentaria, Grev. 



„ filum, Lx. 

 Chordaria flagelliformis, Ag. 

 Chondrus crispus, Lx, 

 Cladophora rupestris, Kutz. 

 Dictyosiphon foeniculaceus, 



Grev. 

 Desniarestia aculeata, Lx. 



„ viridis, Lx. 



Dumontia filiformis, Gi-ev. 

 Ectocarpus granulosus, Ag. 



„ littoralis, Lyngh. 



Enteromorpha compressa, Grev. 

 Euthora cristata, Ag. 

 Fucus canaliculatus, L. 



Fucus nodosus, L. 



„ serratus, L. 



„ vesiculosus, L. 

 Halosaccion ramentaceum, Ag., 



forma densa, Kjellman. 

 Laminaria digitata, Lamx. 

 Polysiphonia arctica, Ag. 



„ urceolata, Grev. 



„ fastigiata, Gh'ev. 



Porphyra laciniata, Ag. 

 Ptilota plumosa, Ag. 

 Khodophyllis dichotoma, Gobi. 

 Rhodymenia palmata, Gi'ev. 

 Spongomorplia arcta (/. typica), 



Kntz. 

 Ulva latissima, L. 



With the exception of Rhodophyllis dichototna and Poly- 

 si2>1ionia arctica, the above Ahjm, Mr Traill remarks, are indi- 

 genous to the eastern coast of the United States of America, 

 where they are generally of luxuriant growth. Their 

 presence in such a high latitude as that of the North Cape 

 is attributed to the influence of the Gulf Stream. The 

 specimens examined are mostly identical in appearance with 

 specimens of the same species found on our own coasts. 

 The form of Halosaccion ramentaceum is, however, ex- 

 tremely robust and proliferous, and is so different in aspect 

 from the typical plant, that one might almost be tempted 

 to call it a distinct species. This genus, however, like our 

 Gelideum corneum, assumes different forms according to the 

 locality in which it occurs, and after a comparison of many 

 specimens, there can be no doubt that they belong merely 

 to a somewhat individualised form ; Mr Foslie of Troms0 

 identifies them as plants of the second year belonging to the 

 Jhrnta dcnsa of Xjclhnan. 



