NOTES ON THE MAUINE BOTANY OF THE COAST OP NORFOLK. 13 



rich in many species which are rare in other parts of the kingdom. 



In the present paper I shall confine myself to notes on the Sea-weeds 

 of the class Melanosospermece. The first order, Fucacece, contains many species 

 common on these shores, among which Fucus vesiculosus, together with F. 

 nodosus and serratus, are very] abundant on every part of the coast, and 

 are the sorts mostly used for manure. The F. ceranioides and canaliculatus 

 are also found on most parts of the coast, though much less abundant than 

 the former. Halidri/s siliquosa and Himantlialia lorea occur in plenty at 

 Cromer. Of the genus Cystoseira, the most common species is G. granidata, 

 which is not unfrequently found on the Yarmouth beach and elsewhere. 

 G. ericoides, fibrosa and faeniculacea are very rare, being only found on the 

 coast after a heavy gale. Among the Sporochnaceoe, the following species are 

 found on these shores: — Desmarestia ligulata, viridis, aculeata, Arthrocladia 

 villosa, and the elegant SporocJtnus pedunculatus, none of which are at all 

 common, especially the two last, which are very rarely found. 



Of the third order, Laminaracece, the most common species on -this coast 

 is Laminaria saccharina; L. digitata is also found in tolerable plenty, but 

 never attaining the size it is found on the more northern shores; L. bullosa. 

 Phillitis, and fascia also occur at Yarmouth, but are by no means common. 

 Ghorda filum is common on rocks and stones between tide-marks at Cromer 

 and elsewhere; I am not aware, however, of the gigantic Alaria esctdenta 

 ever having been found on this coast. Many species of the Dictyotacece are 

 found on this coast, among which Gutleria multifida and Taenia afomaria 

 merit especial notice, both |these plants having been first discovered on this 

 coast, the former on Yarmouth beach, by Mr. Turner, in 1804, and the 

 latter by Mr. Wigg: both species are very rare, Zonaria parvula, Dic'yota 

 dichotoma, and Didyosiphon foeniculaceus occur in many places, and are far 

 from rare. Stilophora rhizoides, Punctaria plantaginea, with Striaria attenuata, 

 are found at Cromer and elsewhere, but are by no means common. Aspcr- 

 ococcus Tumeri, A. eehinatus, and Litosiphon pusillus occur on various parts 

 of the coast, sometimes plentiful: the latter is parasitical on Ghorda filum. 



The fifth order, Ghordariacece, contains the following species found on this 

 coast: — Ghordaria flagelliformis, between tide-marks not uncommon, Mcsogloia 

 vermicular is, and 31. vircscetis, not unfrequent at Cromer and Yarmouth during 

 the summer months. Leathesia tuberiformis and Halfsia verrucosa occur in 

 tolerable abundance near Cromer and elsewhere. Elachistea fucicola is very 

 plentiful, growing on Fucus vesiculosus. Elachistea flaccida parasitical on 

 Gystoseira fibrosa, but very rare. E. stellulata is found occasionally, growing 

 on the fronds of Dictyota dichotoma, but rare. E. scutxdata and velutina 

 03cur not unfrequently on the thongs of Himaiithalia lorea. 



With regard to the species of the minute parasitic genus Myrionama found on 

 this coast, I cannot speak with certainty. The only species I ever found was 

 M. strangulans, groAving on Enteromorpha compressa, on Yarmouth beach. We 

 now come to the EclocarpacecB, the sixth and last order of the olive-coloured Algae. 



