124 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



were put forward by Mr. Batters in his "Revised 

 Catalogue" published in 1902. 4 In the 1890 list a 

 census table was given of species found in the four 

 localities there defined as (a) the Mersey and Dee 

 estuaries ; (b) Hilbre Island ; (c) Anglesea and Puffin 

 Island; (d) Isle of Man. The table is repeated here in 

 a corrected form, some names having been slipped 

 apparently in the counting : — 



Cyanophyceae 

 Chlorophyceae 

 Phaeophyceae 

 Rhodophyceae 



(«) 



(6) 



(c) 



14 



7 



13 



21 



16 



31 



12 



38 



55 



24 



57 



93 



71 



118 



192 



(d) 



1 



23 



47 (69) 

 109 (139) 



(40) 



180 (248) 



The numbers in brackets following the last column 

 indicate the census in the present list, from which it will 

 be seen that 68 species have been added to the catalogue 

 of the Marine Algae of the Isle of Man. 



From this table it will be seen that although, so far 

 as known in 1890, the marine flora of the Isle of Man is 

 a fairly rich one, it includes twelve species fewer than 

 the Puffin Island list, although that island is not more 

 than a couple of miles in circumference. This must not 

 be taken to indicate that the Mona of Tacitus is 

 exceptionally rich as regards Marine Algae when com- 

 pared with the vastly larger Mona of Caesar, but merely 

 that Marine Algae had been assiduously collected in the 

 one district and not in the other. With the exception of 

 the " Revised List " drawn up by one of us in 1890, the 

 only papers known to lis dealing with the Marine Algae 

 of the Isle of Man are one by Dr. Brady, published in 

 1861, 5 one by the Rev. T. Talbot on the Flora of Douglas 

 Bay, published in 1890, 6 and one by Mr. King published 



