294 



FLORA OF PLYMOUTH SOUND 



The preceding foi^ms were, on the whole, better represented on 

 the rocky beach. 



Beggar^ s Island (Rat Island). 



No algologist visiting Plymouth should omit to examine Beggar's 

 Island and the region round St. Peter^s Point, just described. 

 Beggar's Island at low spring tide, on its west and south-west sides, 

 presents a most interesting sight of weeds growing in brackish 

 waters."^ The more interesting forms found were — 

 Antithamnion plumula, |3, very i Polysiphonia, several species. 



fine plants. j Halymenia ligulata, several 



Griffithsia corallina. pieces, probably drifted. 



Pleonosporium Borreri. Ectocarpus siliculosus, E.tomen- 



Dasya ocellata, D. coccinea. i tosus, &c. 



Firestone Bay. 



I have already mentioned how poverty-stricken the beach here 

 is, the shore embankment, &c., being covered with the commoner 

 species of Funis, Ascophyllum nodosum, Rhodymenia pahnata, Gigar- 

 tina mamillosa, Ectocarpus, 8fc. I saw no signs of such rare forms 

 as Crouania attenuata, Arthrocladia villosa, Spyridia filar) tentosa. 

 In the extreme south-west of Firestone Bay, just off the beach, the 

 dredge mouth became choked almost at once with Laminaria digitata. 

 Deeper in, and in a north-easterly direction, the results are better, 

 including — 



Stenogramme interrupta, tetra- 



spores, ? . 

 Spondylothamnion multifida, 



fruit. 

 Antithamnion cruciatum. 

 A. plumula, |3. 

 Chylocladia clavellosa, fruit. 

 Bonnemaisonia asparagoides. 

 Monospora pedicellata. 

 Delesseria hypoglossum, D. rus- 



cifolia. 



Nitophyllum punctatum, 4- 



spores, c? , ? . 

 Chantransia virgatula, on Zos- 



tera. 

 Gracilaria confervoides. 

 Ceramium diaphanum. 

 Scytosiphon lomentarius. 

 Chorda filum. 

 Punctaria (plantaginea ?). 

 Desmarestia aculeata. 

 Cladostephus, Ectocarpus. 



Rhodymenia laciniata,t fruit. 



I dredged in this bay a Crouania-\\kG plant which seemed to 



* Care must be taken in passing from the west to the less interesting central and eastern 

 parts. Several times I sank knee-deep in mud. 



t Miss A. L. Smith, of the Normal School of Science, is at present engaged on the 

 examination of the development of the fruit of B. laciniata, and has already obtained many 

 interesting results. 



