AND ADJACENT WATERS. 293 



Barn Pool. 



Owing to the very strong currents^ dredging here is not possible, 

 except for an hour before and after the turn of the tide. The 

 results, so far as seaweeds are concerned, were negative,* the 

 dredge, in the parts nearer the shore, filling each time with large 

 stones covered with ascidians. 



The Hamoaze. 



Owing to the extremely muddy nature of the bottom of the 

 Hamoaze, dredging, except in one or two localities, is almost useless. 

 The dredge quickly fills with mud, in which only a few weeds, not 

 essentially different from the adjacent shore forms, are found 

 imbedded, and not until much washed, fit for examination. The 

 bottom of the Hamoaze, along the Royal Victualling Yards and 

 along the building sheds, is not muddy — indeed, in the latter region 

 it is very rocky in places, but yields weeds of the commoner kind 

 only. Shore-hunting, either on foot, when one must be prepared to 

 sink ankle-deep in mud, or better, in a punt, is the most successful 

 mode of examination. Mr. Holmes has made many interesting 

 " finds '' at Torpoint. Owing to the regulations affecting the 

 approach of steamers to the powder magazines, I was not able to 

 take more than three or four dredgings off St. Peter's Point. 

 Shore-hunting on foot at the Point itself is full of interest, but very 

 disagreeable. On the Saltash side of the Point the beach is stony 

 for a short distance, and here it is useful to wade at low spring tide, 

 and to pick up, in the muddy water, stones which will be found, in 

 many cases, covered with delicate, filamentous, red weeds. Nearer 

 Saltash it is necessary to take to the punt and to continue the shore 

 examination in it, as the rocky beach ends abruptly, and wading is 

 impossible. In the following list I give only the more important 

 of the locally established weeds, making no mention of the many 

 evidently Sound-drifted ones : 



Delesseria hypoglossum, in all 



conditions, in abundance. 

 Grifl&thsia corallina, tetraspores, 



c?, ? . 

 G. setacea. 

 G. devoniensis. 

 Antithamnion plumula, /3, ? , 



&c. 



Dasya ocellata. 



Callithamnion seirospermum, 0. 

 gracillimum, &c. 



Chylocladia clavellosa, tetra- 

 spores, ? . 



Chondrus crispus. 



Species of Ulva and Entero- 

 morpha, abundant. 



* This was the more disappointing, as I hoped to find the rare weed CarpomUra Calrerx, 

 which twenty years ago was found by Cocks established on Mount Edgcumbe mud-bank. 



