IV. CONTENTS. 



The Distribution of Algse in Space and Time. By 

 George Murray, F.L.S., Botanical Depart- 

 ment, British Museum 164 



The Biological Besults of the Cruise of Mr. A. Holt's 

 S.Y. " Argo " round the "West Coast of Ireland 

 during August, 1890. By Professor W. A. 

 Herd man, D.Sc. With an Appendix on the 

 Sponges by B. Hanitsch, Ph.D 181 



Beport on the Polychaetous Annelids of the L.M.B.C. 



District. By J. Hornell 223 



On the preparations of Marine Animals as Lantern 



Slides. By Dr. H. C. Sorby, F.B.S. . . 269 



List of the Fresh Water Algse of the Liverpool 



District. By W. Narramore, F.L.S. . . 272 



EBBATA. 



Page 28, line 18 from foot, delete Sertularella tenella. 



Page 37, line 7 from foot, delete Leda pemula. 



Page 47, line 4 from foot, delete Chiton discrepans. 



Plate III. reprinted from the Journ. Linn. Soc. has not 

 been re-lettered and bears it original number, PI. 34. 



Page 112, footnote : for Vol. part 33, read Vol. xxviii, 

 part 33. 



Page 130, fifth line from the top; for 29, read 22. 

 Sixth line from the bottom ; for 42, read 45. 



Page 132, sixth line from top ; for 39 read 40. 



Page 140, fourteenth line from bottom ; for 90 read 89. 

 Explanation of Plate V. add 



Fig. 10. Isolated central cell. X 450. 



Fig. 11. Striation on walls of intercellular canal. 

 X 450. 



