2G8 Alnmouth Marine Alga:. By Andrew Amory. 



first specimen of Bonnemaisonia asparagoides, a fine plant of Dasya 

 coccinea, a deep sea variety of the rare Polysiphonia parasitica, growing on 

 a root of Laminar ia digitata, and a few specimens of Cladostephus plu- 

 mosus. 



October 25. At Birliug Car I found a few short thick tufts of Gelidium 

 corneum, about an inch high, at half -tide level; a single specimen of 

 Puhjsiphonia elongata; and a faded specimen of Callithamnion Turner i, 

 floating. On the great detached rock lying nearest the Aln, known as the 

 " Locker Car," Polysiphonia jibrata was quite plentiful, but dwarfish. 



June 6, 1886. Birling Car. On a rock at the extreme further side from 

 Alnmouth, Cladophora arcta was well established, and Callithamnion 

 polyspermum, with tetraspores. At the same thne I noticed that C. 

 arbuscula was abundant on the young mussel shells which cover part of the 

 Car, and quite a large patch of C. Hooker i, growing on the stunted 

 Chondrus, crispus, on the flat exposed rock at low-water mark. 



July 1. When more of the Alnmouth rocks were exposed than I have 

 ever seen, on a ridge running out towards the mouth of the river, called 

 the " South Rock," C. polyspermum and Ceramium acanthanotum were 

 quite common ; and spotted about on the C. crispus, the little round trans- 

 parent fronds of Porphyra leucosticta were also plentiful. Here I found a 

 few specimens of Ectocarpus granulosus, parasitic on one of which, as Mr 

 Batters pointed out, was the small Callithamnion virgatulum. Cladophora 

 arcta flourishes on the " South Rock." 



July 3, was also a most favourable tide. Going to the extreme limit of 

 the very low water mark, the first marine wonder to attract my attention 

 was a big lobster trying to climb out of a' small pool and making as great 

 a splash as a half-stranded salmon. I helped him out. This ramble over 

 the north part of the rocks was only productive of one species not already 

 on my list, viz., Cladophora uncialis; but I noticed C. Hookeri and Ecto- 

 carpus spluerophorus in force, two young plants of Bryopsis plumosa and 

 Ceramium diaphanum. 



August 2. Alnmouth " South Rock." On the rocky bottom of a deep 

 channel, behind the outermost ridge, seldom clear of water, I obtained 

 some good specimens of Polysiphonia atro-rubescens and P. urceolata. 



