106 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Tribe III. — Callymeniese. 

 Callophyllis laciniata, Kiitz. 



Anglesea !, Puffin I. ! 



Order II. — Ehodophyllidace^e. 

 Cystoclonium purpurascens, Kiitz. 



Anglesea !, Puffin I. !, Hilbre I. ! , New Brighton, 



I. of Man. 

 Catenella opuntia, Grev. 



Hilbre I. !, Puffin I. !, Eastham, I. of Man, 

 In the end of October, 1890, whilst on a visit to the 

 Biological Station on Puffin I., I devoted part of my time 

 to collecting Catenella opuntia, which grows there in 

 abundance on the protected faces of rocks near high water 

 mark. On examining the plants on my return to Liver- 

 pool I was glad to find many, if not all, bearing cystocarps, 

 antheridia and tetraspores. The structure of the cys- 

 tocarps is practically unknown, indeed they have seldom 

 been seen. I believe that this is the third time they have 

 been found in Britain, and Prof. Schmitz alone has found 

 them abroad. Mr. Buff ham found some at Sidmouth in 

 1886, and Harvey says he received specimens from Mrs. 

 Griffiths. Harvey's figure and description are totally 

 wrong, and as no detailed account of their structure exists 

 anywhere, I examined them minutely, and the conclusions 

 I arrived at were communicated to the Linnsean Society 

 in Dec, 1890. I may here briefly summarise the main 

 points in that paper. The cystocarpic ramuli are borne on 

 erect branches, each articulation bearing one or two such 

 ramuli. The ramulus is spherical and has imbedded in it 

 50 to 200 carpogenic systems. Only a few of these (10—30) 

 however come to maturity, although most seem to be fertil- 

 ized. A large placental cell occupies the centre of the 

 ramulus, and radiating from it are numerous branched fila- 

 ments, which on approaching the surface become short rows 



