SEA-FISHERIES LABORATORY. 



317 



thousands in a vertical haul of the small Nansen net, the 

 greatest number being 23,700, from 76 fathoms, in the 

 Sound of Coll. 



After Calanus ftnmarchicus, Limacina retroversa is 

 perhaps the most distinctive feature of many of the 

 gatherings — several of which, in fact, such as the haul 

 taken off Neist Point on the W est of Skye, on August 8th, 

 consist chiefly of these two species. 



All the horizontal hauls show a typical zoo-plankton 

 with the exception of the gathering taken oif Lismore in 

 the Lynn of Lorn, on August 26th, which has a consider- 

 able admixture of phyto-plankton, as the following 

 analysis of its contents shows : — 



ZOO -PLANKTON. PHYTO-PLANKTON, 



Calanus few. Ceratium longipes fair number. 



Oithona fair number. Rhizosolenia shrubsolei many. 



Acartia fair number. Asterionella japonica...ie\v. 



Pseudocalanus few. Chaetoceras decipiens few. 



Nauplii fair number. C. spp few. 



Evadne fair number. 



Oikopleura many. 



Plutei many. 



Medusoids fair number. 



We have three surface hauls taken in Loch Hourn on 

 the same day (August 20th) which may be put on record 

 for comparison. 



Outer Loch Hourn (Large Nansen). 



Upper L 



Hourn 



(up.) 



few 



very many 

 very many 

 many 

 many 



many 



very many 



fair number 

 fair number 



Upper L. 

 Hourn 

 (down). 



Calanus great number 



Pseudocalanus very many 



Acartia very many 



Oithona very many 



Temora — 



Euphausid larvae fair number . 



Nauplii — 



Evadne — 



Macruran larvae (Pandalina) ... — 



Lamellibranch larvae — 



Gastropod larvae — 



Pleurobrachia few 



Oikopleura — 



Medusoids fair number . 



Annelid larvae — 



Fish Eggs a few 



Fish larvae — 



few. 



very many, 

 very many, 

 fair number. 



many 



many. 



few. 



many. 



fair number. 



many. 



fair number. 



a few. 



