302 



FLOltA Oi*' PLYMOUTH SOUND 



Wembury Bay itself abounds with submerged rocks, and a 

 tlioroug'h knowledge of its topography, as Roach had, is necessary 

 in dredging. There is no better locality for the Phseophycese and 

 the Corallinacese than Wembury Bay. Chief weeds found : 



Corallina officinalis, squamata, 

 rubens, and /3 corniculata. 



Gracilaria confervoides. 



Khodymenia jubata. 



Fastigiaria furcellata. 



Bonnemaisonia asparagoides. 



Species of Callithamnion, Bho- 

 domela, Polysiphonia, and 

 Lomentaria. 



Delesseria alata, D. sinuosa. 

 Dictyopteris polypodioides. 

 Dictyota dichotoma. 

 Taonia atom aria. 

 Sporochnus pedunculatus. 

 Mesoglcea, Sphacelaria, Clado- 



stephus, Punctaria, Leathesia 



species. 



The Mewstone. 



The rock-pools of this interesting rock are well worth a visit ; 

 protected on the north side and close to the mainland, they are on 

 the south side, for the most part, exposed to and in connection with 

 an open sea. They are richest in the north, north-east, and south- 

 west parts, and, as would be expected, the weeds found in the north 

 and north-east pools are much the same as those found on the main- 

 land opposite. I was pleased to find here a very fine plant of 

 Codium tomentosum bearing zoosporanges, the whole plant a single 

 multinucleate cell, weighing at least three pounds ! 



Polyides rotundus. 

 Sarcophyllis edulis (in plenty). 

 Dasya ocellata. 

 Nitophyllum Hillise, N. punc- 



tatum. 

 Rhodophyllis bifida. 

 Antithamnion plumula. 

 Gigartina mamillosa. 

 Nemalion multifidum. 

 Gelidium corneum, several varie- 



Gymnogongrus plicatus. 



Several species of Callithamnion 

 (including C. polyspermum), 

 Polysiphonia, Ceramium. 



Cutleria multifida, ?,andLami- 

 uaria bulbosa, drifted. 



Dictyota, in plenty. 



Desmarestia, Sphacelaria, Cla- 

 dostephus, Ectocarpus, Bry- 

 opsis, &c., were found here. 



ties (four or five in one pool) . 



On the south and south-west parts, in addition to most of the 

 foregoing, the following amongst others were found : 

 Delesseria hypoglossum, D. rus- 



cifolia. 



Cystoclonium purpurascens. 

 Phyllophora rubens. 

 Spondy lothamniou . 



Fastigiaria. 



Laurencia. 



Chylocladia. 



Rhodymenia. 



Baugia. 



