vu. 



first Memoir appeared in October and the second in 

 December, 1899, the third in February, 1900, and this 

 fourth one will be issued early in April : others will follow, 

 it is hoped, in rapid succession. 



Memoir I. Ascidia, W. A. Herdman, 60 pp., 5 Pis., Is. 6d. 

 II. Caedium, J. Johnstone, 92 pp., 7 Pis., 2s. 



III. Echinus, H. C. Chadwick, 36 pp., 5 Pis., Is. 6d. 



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

 Dendronotus, J. A. Clubb. 

 Alcyonium, S. J. Hickson. 

 Peeidinians, G. Murray and F. G. Whitting. 

 ZosTERA, K. J. Harvey Gibson. 

 Himanthalia, C. E. Jones. 



Diatoms, F. E. Weiss. 

 Fucus, J. B. Farmer. 

 GiGARTiNA, 0. V. Darbishire. 

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

 BoTRYLLOiDES, W. A. Herdman. 

 CuTTLE-FiSH (Eledone), W. E. Hoyle. 

 OsTRACOD (Cythere), Andrew Scott. 

 Patella, J. E. A. Davis and H. J. Fleure. 

 Calanus, I. C. Thompson. 

 Actinia, J. A. Clubb. 

 BuGULA, Laura E. Thornely. 

 Hydroid, E. T. Browne. 

 Mtxine, G. B. Howes. 

 BucciNUM, M. F. Woodward. 

 Lern^a, Andrew Scott. 

 Calcareous Sponge, E. Hanitsch. 

 Aeenicola, J. H. Ashworth, 

 Antedon, H. C. Chadwick. 

 Oyster, W. A. Herdman and J. T. Jenkins. 

 Porpoise, A. M. Paterson. 

 In addition to these, other Memoirs will be arranged 



