100 CHYLOCLADIA. 



angular spores ; 2, triparted tetraspores, immersed in the ra- 

 mu ]j. Name, from xfursos, golden, and i/Kv, a membrane; 

 because the species assume golden tints if steeped for some 

 time in fresh water. 



1. C. clavellosa, Turn. ; frond gelatinous, much branched 

 in a pinnate manner, mostly distichous ; ultimate ramuli lan- 

 ceolate, distichous, or quadrifarious, attenuated at base ; ce- 

 ramidia conical. Grev. Alg. Brit. p. 115 ; Hook. Br. FL ii. 

 p. 297 ; Wyatl, Alg. Damn. No. 23 ; Harv. Plnjc. Brit. t. 

 cxiv. Fucus clavellosus, E. Boi. t. 1283. &. sedifolius ; 

 ramuli between oblong and oval, crowded, undivided. Turn. 



On stones, between tide-marks. Annual. May to September. Various 

 stations on the coasts of England, Scotland and Ireland, but nowhere very 

 common. /3. at Lossiemouth, Mr. Brodie. Fronds tufted or solitary, 3 

 12 inches high, varying from a quarter of a line to more than a line in 

 diameter, gradually widening from the base to the middle, and thence di- 

 minishing to the apex, much branched, repeatedly but irregularly pinnate, 

 the branches patent, opposite or alternate, bearing one or more series of 

 linear-lanceolate ramuli, 1 4 lines in length, and closely set; they, as well 

 as the branches, usually distichous, but sometimes springing from all sides 

 of the frond. Ceramidia conical, with a pore, containing a tuft of angular 

 spores ; tetraspores imbedded in the ramuli. Substance flaccid and slip- 

 pery, closely adhering to paper. Colour a brilliant pink. 



2. C. Orcadensis, Harv. ; frond distichous, pinnate, the 

 main stem and the pinnae elliptic-oblong, compressed ; pinnae 

 opposite. 



At Skaill, Orkney, Miss Watt. The specimens yet seen of this supposed 

 species are insufficient to establish its characters fully, but I am unwilling 

 to omit altogether the recording of so remarkable a plant. My specimen, 

 for which I am indebted to the Rev. J. H. Pollexfen, is evidently in a very 

 young state. It is about an inch high ; each frond elliptic oblong, fully a 

 quarter of an inch broad, bearing three or four distant pairs of pinnae, of 

 similar form, but smaller dimensions. The colour is a clear pinky red. 

 The parts of the frond are proportionally very much broader than in any 

 state of C. clavellosa which I have seen ; but in the absence of full-grown 

 specimens I can form no judgment as to the validity of the species. 



IV. CHYLOCLADIA. Grev. [Plate 13, B.] 



Frond (at least the branches) tubular, constricted at regu- 

 lar intervals, and divided, by internal diaphragms, into cham- 

 bers, filled with a watery juice and traversed by a few 

 longitudinal filaments; periphery composed of small polygo- 

 nal cells. Fructification: 1, spherical, ovate or conical 

 ceramidia, containing a tuft of wedge-shaped spores ; 2, tri- 



