128 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Appendix IV. 



AKTIFICIAL KEY to the GENEBA of MAKINE 

 ALG^ found within the L.M.B.C. District. 



(Adapted by Mr. E. A. L. Batters, F.L.S., from the Artificial 

 Key appended to Prof. Farlow's New England Alga) . 



Note. — "As far as possible the characters used are those 

 which can be seen by the naked eye, but in many cases 

 the generic distinctions absolutely depend on microscopic 

 characters. It should, of course, be understood that the 

 key is entirely artificial and does not represent the true 

 botanical relations of our genera." Moreover, in many 

 cases the characters given refer only to the species found 

 in the L.M.B.C. District. 



1. Colour bluish or purplish green* ; Algse of small 



size, usually more or less gelatinous 



(Cyanophyceze) 5 



2. Colour grass green (CHLOROPHYCEiE) 14 



3. Colour from yellowish brown to olive green or 



nearly black (Ph^eophyce^) 25 



4. Colour red or reddish purple, rarely blackish, in 



fading becoming at times greenish 



(Ehodophyce^e) 56 



5. Cells arranged in filaments 7 



Cells in colonies, but not forming filaments ... 6 



6. Cells grouped in twos or multiples of two . . . Gloeocapsa 

 Cells wedge-shaped or spherical, united into 



hemispherical or irregular colonies ... Dermocarpa 



7. Filaments ending in a hyaline hair 13 



Filaments not ending in a hair 8 



* Glceoccvpsa crepidinum is an exception ; it is yellowish brown in colour. 



