KALLYMENIA, 149 



horizontal filaments radiate towards the membranous peri- 

 phery ; surface cellules hexagonal. Fruclijication : spherical 

 masses immersed in the frond, affixed to the inner coating of 

 the periphery, composed of radiating filaments, whose cells 

 are at length converted into spores. — Name in honour of 

 Count G. Ginaiini, author of an early work on the produc- 

 tions of the Adriatic. 



1. G. fufcellaia, Turn.; frond tender, cylindrical, uni- 

 formly dicholomous, the segments obtuse. Grev. Alg. Brit, 

 p. 163; Hook. Br. Fl. ii. p. 308; Wyatt, Alg. Damn. No. 

 79 ; Harv. Phyc. Brit. t. Ixix. tflva furcellata, E. Bat. t. 



1881. 



On rocks and stones in the sea, rare. Animal. Summer. On the East- 

 ern and Southern shores of England. All round the Irish coast, but no- 

 where common. — Frond 2 — 6 inches long, cylindrical, from a line to 

 nearly half an inch in diameter, repeatedly and regularly dichotomous, of 

 a fine pinky red colour, and either firmly or laxly gelatinous substance. 

 Irish specimens are much larger than the English ones. Some are remark- 

 able for possessing a very distinct midrib. The branches (particularly in the 

 broader specimens) are frequently constricted, as if tied, when the frond 

 assumes a jointed appearance. In a specimen communicated by 3frs. 

 Griffiths, the apices are truncate as if broken ofl", with the margins thickened 

 into a disk or ring, from the centre of which spring one or two little 

 ramuli, showing an evident attempt at prolonging the frond after injury. 

 This species seems widely distributed ; I have gathered it at the Cape of 

 Good Hope, and possess specimens from New Zealand. 



XIII. Kallymenia. J. Ag. [Plate 19, B.] 



Frond blood-red, ribless, expanded, carnoso-membranace- 

 ous, formed internally of three strata ; the inner of interlacing 

 filaments ; the medial of large round cells; the outer of mi- 

 nute cells, arranged in vertical strings. Fructijicalion : 1, 

 spherical masses of spores {favellidia) semi-immersed in the 

 frond ; 2, triangularly parted, scattered tetraspores. — Name 

 from y.a'KXog heiuity, and vf^w, a menihrane. 



1. K. reniformis, Turn. ; stem short, cylindrical, simple 

 or branched, suddenly expanding into a roundish, sub-sim- 

 ple, or irregularly cleft (occasionally producing new fronds 

 at the margin), somewhat lobed frond ; favellidia and tetra- 

 spores scattered over the surface, Harv. Pliyc. Brit. t. xiii. 

 Rhodomenia reniformis, Hook. Br. Fl. ii, p. 292 ; Wyatt, 

 Alg. Danm. No. 19. Iridcea reniformis, Grev. Alg. Brit^ 

 p. 160. Fucus reniformis, E. Bot. t. 2116. 



