AND ADJACENT WATEES. 299 



Rame Head to Penlee Point. 



This part of the coast is fully exposed ; the rock-pools are uot 

 good, numerous, or easily approached. In a cove south of Eastern Gear 

 I found scarcely one filamentous weed, membranous weeds only. 

 Dredging showed, on the whole, a similar general scarcity or absence 

 of weeds. Hydrola'pathiim sanguineum is especially abundant here. 

 In addition I found — 



Bonnemaisonia asparagoides. 

 Spondylothamnion multifida, in 



plenty. 

 Antithamuion plumula, a and /3, 



in plenty. 

 Delesseria alata, D. ruscifolia. 

 Sarcophyllis edulis. 



Dictyopteris polypodioides and 



pennata. 

 Sphacelaria cirrhosa. 

 Cladostephus, Ectocarpus, and 



several others (6 — 8) common 



genera. 



Whitsand Bay. 



Owing to the very sandy nature of the bottom of this bay, and the 

 scarcity of weeds, the dredge is of very little use, digging into and filling 

 with sand in a few yards, with a resulting stoppage of the steamer if 

 slowly moving. In the extreme east of the bay the ground is very 

 rocky, and, owing to weather and want of time, my work here was 

 confined to the shore weeds. Nowhere did I find more driftweed, 

 and probably after a storm a rich harvest would be reaped in 

 Polhawn Cove, below the Coastguard Station. The rock-pools are 

 good, and well stocked with most of the weeds to be met with in the 

 littoral zone of Plymouth waters, well repaying examination. The 

 beach, 300 yards west of Polhawn Cove, is very barren for miles. 

 Time after time the dredge when hauled in showed only one or two 

 weeds, and had I relied for my conclusions on the contents of the 

 dredge, I should have supposed that only very few weeds were pre- 

 sent in Whitsand Bay, and that these were confined to half a dozen 

 genera (excluding from this generalisation the unexamined eastern 

 part of the bay). Fortunately I was allowed to overhaul the trawl 

 of the '' Penguin,'^ after a run from west to east of the bay (nearly 

 three miles). 



On this trawl I found representatives of at least forty genera. I 

 took off every weed on the trawl for detailed examination later. 

 The weeds from this trawl, with a fifteen-foot beam, after a run of 

 nearly three miles, occupied no more space than those taken in 

 Cawsand Bay in the dredge after a run of 30 — 40 yards. The more 

 interesting forms trawled were — 



