168 SYNOPSIS OF BRITISH SEAWEEDS. 



i" doubt the identity of tlic -plant with thai figured by 

 Dillwyn, 1 think it best to abstain from quoting any >\- 



m for habitat which J have not recent . 

 My description therefore lias reference alone to the - 

 mens published by Mrs. (. : r;tiit!is in Wyatt's 'Algae Dam- 

 nonienfles,' and to BUch as agree with them in character. 



300. gracilis [The slender Cladophora); filament* very long, 

 capillary, demons, silky, much branched, bright ye] 



main branches entangled, sparingly dri a ilarly bent; 



ultimate ramuli pectinate, Becund, much attenuated, stra 

 and very long; articulations 3-5 tunes longer than bi 

 Earn. Ph ;! . Brit. pi. 18. (Atlas, PL LXV. Fig. 302.) 

 Conferva gracilis, Qriff. 



Hah. Growing on Zostera and the larger Algae, in 4-5 fathoms. 

 Annual. Summer. 



A> far as British species are concerned the student will 

 find little difficulty in recognizing this plant; the only 

 ones with which it can be confounded are C.Jlexuosa, than 

 which it is much more luxuriant, more glossy, and more 

 branching ; and C. Kaneana, M'Calla, which is softer, 

 more flaccid, and much more slender and delicate. But 

 the exotic species of this puzzling genus have not been 

 sufficiently compared together to judge to which of them 

 it most nearly approaches, or whether it may not be iden- 

 tical with some European form which passes under a dif- 

 ferent name. I have sometimes feared that it should be 

 referred to C. sericea of Both. 



301. Balliana (Miss BalVs Cladophora) ; filaments elongate, 

 extremely slender, soft, grass-green, much branched ; the 

 branches excessively divided, the penultimate ones virgate, 

 and set with slender, secund, one- or two-jointed ramuli ; 

 articulations of the branches eight or ten times as long as 

 broad, of the ramuli six to eight times, all filled with <!. 

 granular endochrome ; dissepiments broad and hyaline, 

 ffarv. Pfy. Brit.pl. 356. (Atlas, PL LXV. Fig. 303.) 



Hah. Sea- shores. 



Cladophora Balliana is readily known from all its Bri- 

 •ngeners but one, by the tenuity and lubricity of the 

 filament, in conjunction with the great length of the cells. 

 The only species with which it can be confounded is C. 

 Rudolphiana s but the ramification is so different in that 

 plant, that, notwithstanding a near agreement in the I 

 of the articulations and the general aspect of the tuns, 



