Report of Fauna and Flora Committee — Irish Phceophycece. 449 



^. glohifer, Kiitz. 13 N. (With plurilocular sporangia). 



This species is the E. insignis^ Crn., which is also synony- 

 mous with ]^. pusillus, Kiitz. (non Griff, or Harv.). 



E. Crouani, Thuret. 12 N. 



E. confervoides, Le Jol. 10-14. 



S. siliculosus, Lyngb. Common. 



The researches of Berthold, Sauvagean, and Kuckuck seem 

 to place beyond doubt the isogamous reproduction by gametes, 

 of E. siliculosus and Scytosiphon lonientarius. In other cases, 

 according to M. Sauvagean, detailed examination is still a 

 desideratum. The zoospores, after their escape, show a great 

 variability of behaviour. The origin of the zoospores from uni- 

 locular or from plurilocular sporangia is no certain indication 

 that the zoospores are asexual zoogonidia, true gametes or 

 facultative gametes. 



E. penicillatus, C. Ag. 12 JT, On Alaria esculenta. 

 E. fasciculatus, Harv. 10-14. ^ 



/. drapernaldioides, Crn. 12 N. 

 E. granulosus, C. Ag. 10-14. 



E. Sinchsice, Harv. ION. 12 H. 14 N. 



Probably on all the coasts, though not common. Previously 

 recorded from the north-east, we know it from the north-west 

 (Gola Is.), and from the south-east (Helvick Point). Sauvageau 

 thinks the unilocular, sporangia may prove to be antheridia. 



E. tomentosus, Lyngb. 10-14. 



One of the commonest and most easily recognised of the 

 Ectocarpi, on Gigartina mamillosa, &c. 



E. crinitus, Carm. 12 N. 



E. crinitus, Carm., is, according to Bornet, most probably, a 

 state of Acinetospora pusilla, Griff. {E. pusillus, Harv.) It 

 grows generally on Cladopliora rupestris. 



E. Landshurgii, Harv. 



11 H. (Kilkee, Boundstone). 



E. distortus, Harv. 11 H. 12 M. 



A littoral weed, growing on Zostera. 



