ENTEROMORPHA. 303 



to which its offensive smell certainly allies it. But the form 

 and appearance of the granules are so totally unlike the frus- 

 tules of any diatomaceous plant, that, for the present at 

 least, I retain it near Palmella, to which it seems to me 

 about as much allied as Chatophora endivi&folia to the shape- 

 less species of that genus. If a true diatomaceous plant, it 

 ought, as Agardh suggests, to form the type of a new series, 

 of which, perhaps, our Cymbella Icetevirens might represent 

 the lowest form." Harv. 



There is not the least question but that the Hydrurus 

 Ducluzelii is not a diatomaceous plant, and it is equally clear 

 that it is an undoubted member of the family of the Ulvacece, 

 in some measure connecting Ulva with Enteromorpha. The 

 granules are oviform, precisely resemble zoospores, with 

 which in function it is difficult to conceive that they are not 

 identical, the thin being transparent. 



Section ii. 

 Frond reticulate. 



43. ENTEROMORPHA Link. 



Char. Frond tubular, hollow, membranaceous, and of a reti- 

 culate structure. Fructification consisting of three or 

 four granules aggregated in the reticulations. 



Derivation. From evrepov, the entrail, and fJiop^Tj, a form 

 or appearance. 



1. ENTEROMOBPHA INTESTINALIS Link. 



Plate LXXVII. Fig. 2. 

 Char. Fronds elongated, simple, inflated, often floating. 



Grev. Alg. Brit. p. 179.; Wyatt, Alg. Dar. No. 80. 

 E. B. 2756. ; Harv. in Hook. Brit. Flor. p. 313. ; et in 

 Manual, p. 174. E. lacustris Hassall, in Trans, of Lin- 

 nsean Society. 



Hob. In ditches. Common, summer and autumn. 



