108 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



summer of 1906, as none were observed in May. The 

 organism was present ai all Hie stations in June, and in 

 large numbers again in August and September. The 

 hauls taken in October showed a decided decrease, which 

 became still more marked in November. It is probable 

 that the maximum point of the invasion was readied 

 about the end of August. The bulk of the samples taken 

 in August and September consisted of Noctilucd. 



Specimens of Sagitta were present in the area in each 

 of the months that collections were taken, and only once 

 appeared to be absent from any of the three stations. 

 The largest number of specimens were taken in 

 September. Copepoda apparently follow pretty much the 

 same increase as the other groups, and the largest 

 numbers were found in the September hauls. 



When a complete series of hauls with the Hensen 

 net along this line is available for comparison, it will be 

 possible to discuss more fully the changes that take place 

 from month to month amongst the organisms that make 

 their appearance in the upper layers of the sea throughout 

 the year. 



