first three Memoirs will be issued before the end of 1899, 

 and others will follow it is hoped in rapid succession. 



Memoir I. Ascidia, W. A. Herdman, 

 II. Cockle, J. Johnstone. 

 III. Echinus, H. C. Chadwick. 

 Dendeonotus, J. A. Clubb. 

 ZosTERA, K. J. Harvey Gibson. 

 Halidrys, C. E. Jones. 

 CoDiUM, E. J. H. Gibson and Helen Auld, 

 Diatoms, F. E. Weiss. 

 GiGARTiNA, 0. V. Darbishire. 

 Alcyonium, S. J. Hickson. 

 Plaice, F. J. Cole and J. Johnstone. 

 BoTRYLLOiDES, W. A. Herdman. 

 Cuttle-Fish, W. E. Hoyle. 

 OsTRACOD, Andrew Scott. 

 Patella, J. K. Ainsworth Davis. 

 Calanus, I. C. Thompson. 

 Actinia, J. A. Clubb. 

 POLYZOON, Laura K. Thornely. 

 Calcareous Sponge, E. Hanitsch. 

 Porpoise, A. M. Paterson. 

 Arenicola, J. H. Ashworth. 

 Oyster, W. A. Herdman. 



Finally, I desire to acknowledge that a welcome 

 donation of £100 from Mr. F. H. Gossage of Woolton 

 has met the expense of preparing the plates in illustration 

 of the first few Memoirs, and so has enabled the 

 Committee to commence the publication of the series 

 sooner than would otherwise have been possible. 



W. A. Herdman. 



University College, Liverpool, 

 Odohcr, 1899. 



