AND ADJACENT WATERS. 



291 



interrupfa in plenty, tetrasporous, male and female plants, and hope to 

 publish shortly the results of my examination of this interesting 

 plant. Dudresnaia coccinea (tetrasporous and ? plants) was also in 

 quantity, and in such a condition as to allow one to follow out all the 

 stages in the strange formation of the cystocarps, first made known 

 by Thuret and Bornet. A month earlier (middle of June to middle 

 of July) would have yielded still better results. 



The following are the more important forms met with in the tri- 

 angular area : 



Rhodophyllis bifida, tetraspores, 



fruit. 

 Nitophyllum Hillige, tetraspores, 



fruit. 

 Gracilaria confervoides. 

 Sporochnus pedunculatus. 

 Dictyota dichotoma, (J 



tetraspores. 

 Sphacelaria cirrhosa. 

 Striaria attenuata. 



?, 



S. interrupta, and the others 



just named. 

 Callithamnion seirospermum, 



and other species. 

 Antithamnion plumula, a gen- 

 uinum, and /3 crispum, tetra- 

 spores, ? , c? , fruits. 

 Naccaria Wigghii, ? , fruit. 

 Bonnemaisonia asparagoides, ? 



fruit. 

 Delesseria ruscifolia, fruit. 



Dredging between (1) the lighthouse on the west end of the 

 Breakwater, and Picklecombe Fort on the mainland yielded Haly- 

 menia ligulata in abundance, with cystocarps, Scinaia furcellata, 

 Sporochnus pedunculatus, Bonnemaisonia asparagoides, Rhodophyllis 

 hifida, and Dictyota dichotoma, 2^ fertile; and combined with dredging 

 between (2) Queen Ground Buoy, Panther Buoy, and Breakwater light- 

 house showed (spite of the nature of the sea bottom, which in some 

 places is very rocky, in others sandy, neither condition being favorable 

 to dredging) that, except for Stenogramme interrupta and Taonia ato- 

 maria, the weeds found at the west entrance to the Sound are very 

 much the same as those found in the east entrance (round the Duke 

 Rock Buoy) . In all, representatives of at least forty genera (in some 

 cases several species) were found. Monospora pedicellata and 31. 

 clavata with m.or\os^ores, Phyllophora ruhens with nemathecia, Arthro- 

 cladia villosa with zoosporanges, Punctaria tenuissima were met with 

 here, and not in the east entrance. 



E ^ w 



Inside Breahwater. 



i 



Dredging inside the Breakwater across the Sound, east to west, 

 was, as already said, interfered with by the forts' cables. The weeds 

 found are not improved in quality by the use of this ground as the 

 anchorage for the men-of-war, cinders, &c., being dredged in 



