15 120 /' - •■'■ R . / i i .1 



identification ; but tell? me that Reinke's plant > • ryosiphon 



The branches in the latter alga, though usually rag 

 opposite, are frequently alternate. The distribution s 

 therefore much wider than was formerly thought, the plant being known not 

 <>nlv from the Mediterranean, but from KieltKeink I jj I 



1904, . d I den B 



Dichosporangiani Chordariae Wollny. 

 (Hedwigi 127-130, tab. 1. figs, 1-5, tab, ii. fig. &) 



Though oot previously detected in the British Isles, this minute endophyte 



is probably Frequent in the old fronds of Choi\1<iri<i rfa^Jfi/ormi^ as it is in 

 Heligoland. The Clave Island specimens were found in October, 1910, in 

 hands that were also infested with Bulboeoleon. The plant is not rela:- 

 the original species : Piihosporangium (i.e. /). repots** My riot rich i*i type** 

 Kuek. v ; and there appears to be n trhy it should not be place*! in 



streblonema. 



Sphacelaria britannica Sauv. 



<sor Sauvageau, who kindly looked over the material of Sj 

 confirms the determination of this species, which is not uncommon on 

 boulders in caves and in similar shady spots. The plant was added to the list 

 of Irish algae by Batters, who found it at Lambay. 



s. eirrhsn .\_ 



Exceedingly common in our area, extending from the shallow-littoral 



legion, through the littoral, and up to the highest rock-pools. It is usually 



epiphytii : but on semi-sheltered shores it forms an element in the sand* 



.ation of the 1. ruhtlnm. In this condition it has often 



been mistaken in the past for & rwrfj 



S. plumula Zan. 

 NYw to li eland. A few specimens of this were dredged in 4 to "• fathoms 



in Clew Bay and at Koundstone. 



MYRIONXMACEAE. 



The Myrionemaceae, as presented in our alg 



lonfusion. but it is hoped that the monograph, shortly to l>e published, will 

 bring about a measure of order. In the present report some of the results 

 an forestalled, alterations in nomenclature being made when necessary, and 

 au explanation given. 



