stated that the ocean near the Arctic reigons is sometimes found to 

 be of an almost red colour, from the abundance of one large species 

 of copepoda— the Calanus finmarchicus, which is known to constitute 

 an important part of the food of the whale, and must therefore 

 exist in prodigious quantities. Indeed the presence of copepoda 

 throughout the sea seems almost universal, and they are one of the 

 many forms of life that give rise to the phenomena of pho?]3ho- 

 resence. They vary in size from l-30th to ^ inch in length in 

 different species, 1-lOth inch being about the average size, and 

 appear to be equally plentiful on a fine or stormy day. Mr. 

 Thompson proceeded to describe the means adopted for permanently 

 preserving and mounting the specimens of the various species 

 obtained, many of which were shown upon the screen from care- 

 fully prepared drawings by the aid of the oxy-hydrogen lantern. 

 Amongst the latter the nauplius or larval condition was shown 

 and its metamorphosis traced out, the embryological development 

 throughout the crustacea being very remarkable. The paper con- 

 cluded by commending the study of these and allied forms to the 

 members as having a wonderfully varied arrangement of structure 

 and affording a continual feast of surpassing interest and instruction 

 to the microscopist and lover of nature. 



Professor Herdman and others took part in the subsequent 

 discussion, and the thanks of the Society were awarded to 

 Mr. Thompson. 

 At the Conversazione the following subjects were illustrated :— 



Algas, Marine, various Alfred Leicester. 



Annular cells from Cactus, Opuutia cylindrica... Thomas C. Ryley. 



i r Copepoda, Anomalocera patersonii, &c Isaac C. Thompson. 



,«" , , Calanus finmarchicus Charles Botterill. 



'^ ,, Candace truncata A. T. Smith, .Jun. 



^J ,, Centropages hamatus William Oelrichs. 



Dias longiremis John Vicars. 



Pseudocalanus elongatus John H. Clayton. 



^ , , , Temora longicornis Henry M. Bennktt. 



Cuticle of Canary Seed T. Bickesteth Berey. 



Cyclops Edward New all. 



Dodder, Cuscuta trifolii, exhibiting suckers Kev. Frank Ballard, M.A. 



Head of Was]), showing organs in situ J. M. Williams. 



Section of nerve fibre, human Thomas J. Davibs, M.R.C.V.S. 



Swds of Pyrola rotundifolia Robert Nicholson, 



