Plate LXII. 



Fig. 288. CODIUM ADHJERENS. 



Colour. Dark green. 



Substance. Gelatinous; densely spongy. 



Character of Frond. A velvety crust, spreading over the surface of rocks in irregular 

 patches. 



Measurement. Patches, 2 or more feet in extent. 



Fructification. Not observed, but no doubt the sanie as in other species of Codkim 

 (refer under Figs. 284 and 285). 



Halitat. Torquay. Land's End. Grorran Haven. Falmouth. Co. Antrim, &c. 

 On rocks near low-water mark. Very rare. 



Fig. 289. CODIUM AMPHIBIUM. . 



Colour. A grassy green. 

 Substance. Soft; densely spongy. 



Character of Frond. Minute; upright; cylindrical; round-topped; rising in great 

 numbers from a spreading base of entangled threads {filaments) ; usually 

 simple; rarely branched. 



Measurement. From J of an inch to 1 inch high ; the patches spreading indefinitely. 



Fructification. Not observed, but no doubt the same as in other species of Codium 

 (refer under Figs. 284 and 285). 



Habitat. Roundstone, and at the head of Birtirbui Bay, Gralway. On turf-banks at 

 high-water mark ; washed over by the tides, but exposed to rain and air at 

 other times. 



Fig. 290. VAUCHERIA MARINA. 



Colour. Bright green; becoming rather brownish when old; somewhat glossy when 

 dry. 



Substance. Exceedingly soft and limp. 



Character of Frond. Fine tufts of hair-like threads {filaments). Filaments not 

 jointed; tubular throughout; filled with green colouring matter {endochrome), 

 which often runs partially out; irregularly branched; occasionally forked. 

 Branches few, long, upright, blunt. 



Measurement. From 1 to 3 inches long. 



Fructification. Small, stalked, pear-shaped sacs {sporangia), containing a dark-green 

 mass which changes at maturity into minute seeds {zoospores ; so called from 

 having at one period a motion as if endowed with animal life) ; borne on the 

 branches. 



Habitat. Torbay. Salcombe. Appin, &c. On algae and mud between tide-marks. 



This little plant grows profusely, even to a troublesome extent in aquariums, 

 fruiting regularly in the summer. 

 49 * H 



