38 THE JOURNAL OP BOTANY 



Newport Bay, with its wide sweep, was hurriedly searched, and 

 though not possessing a rich flora, was very much better than 

 anything previously seen. On the rocks at the south-west corner 

 (and probably at the north-east also) algal associations of the 

 " exposed " series were found, the band of the short form of 

 Porphyra umhilicalis being well developed. These rocks appeared 

 suitable for Callithamnion arbuscula, but it was absent. Pools 

 sufficiently clean and clear for Codium mucronatum were frequent, 

 but not a plant was noted. Considering the date of the visit 

 (August) the vegetation of this bay showed much variety, and 

 in spring the flora must be a rich one. 



A certain amount of rocky ground occurs between Goodwick 

 and the old town of Fishguard. These rocks, which are easily 

 reached by boat, possess a fair algal vegetation, but it is of the 

 semi-sheltered type. A large amount of clean drift had collected, 

 the examination of which gave a good idea of the sublittoral 

 flora. No specimens of Ptilota, however, occurred amongst it. 



By far the best piece of collecting ground w^as a little bay at 

 Dinas. The rocks, slaty but not much broken, are accessible on 

 either side of the bay, and the ground exhibits on the right the 

 exposed type of rocky-shore formation, and on the left the 

 semi-sheltered type, and the sand-and-rock series. These rocks, 

 though they occupy a small area, have a very rich flora ; and the 

 sudden appearance of such a large number of species shows how 

 generally the spores are distributed, and how ready the plants are 

 to thrive when the conditions for their establishment are suitable. 

 For an examination of the flora of the rocky shore of Pembroke- 

 shire this little bay could hardly be beaten ; indeed, for variety of 

 ground and richness of flora in a compressed area, it is one of the 

 best I have met with. By the road, which is hilly, Dinas Bay is 

 four and a-half miles from Fishguard town and six miles from 

 Fishguard Harbour Hotel. In good weather it is a pleasant sail 

 of three or four miles from the G. W. E. quay at Fishguard. 



On the right side of Dinas Bay the Nemalion association is 

 well developed, and in its upper parts a distinct but rather sparse 

 belt of Gallithamnion is present. It was at once obvious that 

 this belt was composed of C. spongiosum, and not of C. arbuscula, 

 a conclusion which was confirmed by the microscopic examina- 

 tion of a number of specimens both saxicolous and epiphytic. A 

 few pools exist, but Codium mucronatum was hunted for in vain. 

 Ptilota also was not found. This concluded the search in south- 

 west Wales. It is tolerably certain that P. jAnviosa is absent, 

 and that C. arbuscula does not occur. Not a sign of the interest- 

 ing Codium mucronatum was seen on any occasion. 



3. North Cornwall (September). — The north Cornish coast is 

 so familiar that it need not be described. Padstow, Newquay, 

 and St. Ives were the spots specially investigated, each of which 

 had been more or less worked by Mr. E. M. Holmes and by the 

 late R. Y. Tellam. St. Ives is poor for algae, but the shore towards 

 the south-west affords here and there some better ground. Both 

 at St. Ives and at Newquay C. arbuscula was altogether absent, 



