106 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Copepoda were abundant in July, August, and September, 

 as the following numbers of individuals show : — 



July, monthly average = 45,307, largest haul = 94,648 on July 27th. 

 August, „ ,, 39,739, ,, ,, 95,526 on Aug. 28th. 



Sept., ,, ,. 57,616, „ ,, 118,524 on Sept. 25th. 



This last number agrees very closely with the largest haul 

 in 1915 (117,340 individuals on August 2nd). A swarm of 

 Calanus appeared in the bay on July 11th, when over 12,000 

 specimens were taken in a haul. A few days before a similar 

 haul gave only 10 specimens, and a few days after 200. 



The largest single hauls of fish- eggs in 1916 were on 

 March 31st (284), April 1st (450 and 396), April 3rd (334 and 

 287), April 10th (295 and 278), April 15th (249, 256 and 259), 

 April 19th (344), and May 4th (352). 



The remaining groups of small animals (chiefly Medusae, 

 Cladocera, Sagitta and Oikopleura) and the various larval 

 forms (Echinoderm, Molluscan, &c.) which make up the rest 

 of our plankton gatherings have been identified and computed 

 as usual, and we have detailed records of their distribution 

 throughout the year. As in 1915, they present no unusual 

 features that call for special remark, but simply confirm 

 more or less exactly statements which we have given in previous 

 reports, and which we hope to formulate more definitely 

 and discuss in detail when it becomes possible to publish the 

 full results of this ten years' survey of Irish Sea plankton. 



