Plate LXX. 



Fig. 328. CONFERVA BANGIOIDES. 



Colour. Dark and very glossy green. 

 Substance. Yery gelatinous; soft; sticky. 



Character of Frond. Long, dense tufts of close-clinging, slender, wavy, 

 jointed threads (filaments), unb ranched. Filaments rather finer than 

 horse-hair. 



Joints. About twice as long as broad; at first quite filled with light green 

 colouring matter {endo chrome), which afterwards contracts into a dark 

 green spot in the centre. 



Measurement. From 3 to 6 inches long. 



Fructification. Minute seeds [zoospores] formed of the colouring matter in 

 the joints, collected into a round central mass [sporidium] , which in 

 due time bursts out. 



Ilahitat. Breakwater, Plymouth. Torquay. Port Ballantoae, N. Ireland. 

 On rocks, &c. near low- water mark. 



Xow Hormotriclmm hangioides. Like, but larger and longer than C. Youngana. 

 Easily known from most Confervas by its glossiness and soft gelatinous feel. 

 From G, collahens by its quite different colour. For other Confervas see Plate 

 LXXII. It should be observed that such Confervas (and Lynghyas) as have 

 been removed to the genus Hormotrichum are remarkable for their soft, gelatinous 

 substance, the shortness of their joints, and the contraction of their endochrome, 

 at maturity, into a central spot. 



Fig. 329. ENTEROMORPHA INTESTINALIS. 



Colour. A full green; but apt to fill with sand or dirt_, and become dis- 

 coloured. Fading to yellow and white. 



Substance. Membranaceous; thin. 



Character of Frond. Cylindrical; tubular; unbranched; inflated like a delicate 

 green bag; widening upwards to a round broad end; tapering to a 

 mere thread at the base; more or less wrinkled and curled throughout; 

 several rising from a minute root; attached, therefore, at first, but 

 afterwards floating. 



Measurement. Often 2 feet or more long, but sometimes not more than an 

 inch. Of every width between inch and 3 inches. 



Fructification. Minute seeds (zoospores) formed of the colouring - matter in 

 the cells of which the frond-membrane is composed; and in due time 

 bursting through them. 



Ilahitat. Our coasts generally. In brackish ditches also; and occasionally 

 in inland waters. In a pond in the kitchen-garden at Bishopthorpe 

 Palace, York. Yery common. 



Narrow forms resemble E. compressa, but there is an unfailing rule for 

 knowing them apart. F. compressa is always somewhat branched, however 

 little. F. intestinalis is always perfectly simple. 



65 ' * K 



