MARINE BIOLOGICAL STATION AT PORT ERIN. 79 



pigment, as three successive changes of spirit have now, 

 during the last three months, been coloured by it. The 

 violet pigment of the preserved specimen, however, 

 seems to be insoluble, as fragments so coloured have been 

 kept in absolute alcohol, in chloroform, in bisulphide 

 of carbon, and in xylol, for weeks without showing any 

 change in tint. 



I am now making a microscopical examination of 

 the tissues of the Hebridean and the Naples specimens 

 in order to determine whether any structural differences 

 can be discovered between these two very similar forms. 



L.M.B.C. Memoirs. 



Since our last report was published, Memoir XX, on 

 Buccinum, the large whelk, by Dr. W. J. Dakin, has 

 been levied to the public; and Etjpagurtjs, the Hermit 

 Crab, by Mr. H. G. Jackson, M.Sc, is now in the 

 printers' hands and will be issued before the end of the 

 year as Memoir No. XXI. Miss E. L. Gleave, B.Sc, is 

 engaged on a Memoir on Archidoris, the Sea-lemon; 

 and still others are in preparation. 



The following shows a list of the Memoirs already 

 published or arranged for : 



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

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

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

 IV. Codium, E. J. H. Gibson and H. Auld, 3 Pis. 

 V. Alcyonium, S. J. Hickson, 30 pp., 3 Pis. 

 VI. Lepeophtiieirus and Lern^ea, A. Scott, 5 Pis. 



