INTRODUCTION. Vll. 



convenient volumes. It is hoped that such a series of 

 special studies, written by those who are thoroughly 

 familiar with the forms of which they treat, will be found 

 of value by students of Biology in laboratories and in 

 Marine Stations, and will be welcomed by many others 

 working privately at Marine Natural History. 



" It is proposed that the forms selected should, as tar 

 as possible, be common L.M.B.C. (Irish Sea) animals and 

 plants of which no adequate account already exists in 

 the text-books. Probably most of the specialists who 

 have taken part in the L.M.13.C. work in the pa&t will 

 prepare accounts of one or more representatives of their 

 groups. The following have already promised their 

 services, and in many cases the Memoir is already far 

 advanced. The first Memoir appeared in October and the 

 second in December, 1899, the third in Febmary and the 

 fourth in April, 1900. Others will follow in rapid 

 succession. 



Memoir I. Ascidia, W. A. Herdman, 60 pp., 5 Pis. 

 II. Carditjm, J. Johnstone, 92 pp., 7 Pis. 



III. Echinus, H. C. Chadwick, 36 pp., 5 Pis 



IV. Com CM, 11. J. H. Gibson and Helen Auld, 

 Dendronotus, J. A. Clubb. 

 Alcyonixtm, S. J. Hickson. 

 Peridinians, Cf. Murray and F. Gr. Whitting. 

 Zostera, R. J. Harvev Gibson. 



HlMAXTHALIA, C. E. Jones. 



Diatoms, F. E. Weiss. 

 FlTCTJS, J. B. Farmer. 

 Gtigartina, 0. V. Darbishire. 

 Plaice, V. J. Cole 4 and J. Johnstone. 

 BoTRYLLOIDES, YV. A. Ilcrdinan. 

 CuTTLE-FlSH (ELEDONE), W. K. Hoyle. 



Ostracod (Cythere), Andrew Scott. 



