254 TRANSACTIONS. 
plant scarcely four inches in length, grows in tufts on rocks 
between tide marks at Douglas Hall and Colvend. & Ceranoides 
at the mouth of Nith near Glencaple. 
Himanthalia Lorea, or sea thongs, grows on the rocky shores 
at low water mark and is frequently washed ashore with spring 
tides. Desmarestia aculeata 1s a representative of the second 
order — Shorochnacee--occasionally met with growing in pools on 
the Colvend coast. Order 7/7.—Laminariacee is represented by 
Alaria esculenta, occasionally washed ashore in winter ; Laminaria 
digitata and L. Saccharina, frequently met with along the Caer 
laverock shore ; and also Corda fi/um in winter and spring. The 
plants in the next three orders grow attached to rocks at low 
water, or in tidal pools, but I have only been able to distinguish 
one genus— _Dictyosiphon—from Ruthwell. 
Sus-Ciass I].—Rdodospermee.—The plants in this sub-class — 
differ in texture and colour, and the frond is more or less jointed, 
as you will notice from the specimens exhibited. Odonthalia 
dentata, frequently met with on the coasts of Fife, should be found 
at Colvend. olysiphonia nigrescens, P. fastigiata, are very fre- 
quently met with on the stems of iuzcus nodosus. Laurencia 
pinnatifida, or pepper dulse, found growing on stones at Colvend. 
Corallina officinalis grows on the rocks at Douglas Hall, &c., and 
Delesseria sanguinea, D. alata, grow attached to the stems of the 
Laminaria. Plocanium coccineum is abundantly met with along 
the whole coast, and is a great favourite with every sea-side visitor. 
Rhodymenia palmetta, dulse, not so frequently used for dietetic 
purposes as formerly, grows attached to the rocks, and the lesser 
dulse, Jridwa edulis, is occasionally met with among the larger 
seaweeds attached to the rocks. Several species of the Ceraméacee 
may be found in the waters of the Solway. Ceramium rubrum, 
C. roseum, C. Turnert are occasionally gathered growing on the 
larger seaweeds. 
Sus-Cuass II].—Chlorospermee.—The grass-green seaweeds 
are represented by the Siphonacee, Confervacee, and Ulvacee, 
among which Cladophora rupestris, common; Conferva rupestris, 
C. Albida, Enteromorpha intestinalis, and Ulva latissima are fre- 
quently met with on the sand shores at Caerlaverock and 
Ruthwell. 
