SEA- FISHERIES LABORATORY. 381 



Podon intermedium did not appear in the Bay 

 gatherings until April 7th, about a month later than usual. 

 The numbers were low (25 or under) till May 20th, when 

 they rose to 120, and from then till towards the end of 

 July they ranged from zero to 280. From July 24th 

 onwards they were generally, though not consistently, 

 higher. The only three hauls of over a thousand were 

 1,025 on July 31st, 1,120 on August 21st, and 2,900 on 

 September 1st. After the latter date the numbers dropped, 

 and 22 on October 8th was our last record. 



Evadne uordmanni was not represented in our standard 

 hauls until May 20th, when 1,230 were taken. The maxi- 

 mum was reached on June 5th, with 1,630. The numbers 

 dropped to zero on June 20th, and after that the species 

 was only obtained in numbers ranging from 10 to 160, on 

 about half-a-dozen occasions, the last being the 8th of 

 September. 



Sagitta. 



Sagitta bipunctata was again present throughout the 

 year, being represented in practically all our standard 

 hauls. The maximum is at the end of June with 1,730 

 on the 24th, and 1,498 on the 27th. There was no increase 

 in late autumn in 1913. 



It may be added — although this comes properly into 

 next year's report — that during the Easter vacation work 

 in 1914, when Sagitta was being obtained off Port Erin in 

 small numbers in the surface nets, we found that by using 

 weighted nets in a deeper zone of water unusually large 

 hauls of Sagitta were obtained. We have had the same 

 experience on occasions in former years, and we arc of 

 opinion that the ordinary surface nets do not give any 

 adequate representation of the Sagitta fauna. 



