of the Fishery Board for Scotland. 309 



This gathering, which was considerably larger than any of the others, 

 measured about 96 c.c, nearly 89 c.c. of this consisting entirely of Calanus 

 finmarchicus, which was the only Entomostracan observed in this gathering. 

 The number of Calanus would be, approximately, about 30,000. The 

 remaining portion of the gathering consisted of Ctenophora (rare), 

 Diatomacea, Infusoria, and Radiolaria. 



18. This gathering consisted of one haul of the tow-net at the same 

 station as No. 17, and on the same date : it was collected at 9 p.m., at the 

 surface of the water (the net being towed for 15 minutes). 



The total contents of this gathering measured 65 c.c. , and consisted 

 chiefly of Calanus. A few other species were observed, but these were of 

 more or less rare occurrence. The number of Copepoda in this gathering 

 would be, approximately, about 22,000. The following are the names of 

 all the species observed : — 



Calanus finmarchicus (Gunner). Acartia Clausii, Giesbrecht. 



Pseudocalanus elongatus, Boeck. Parathemisto (?) gracilipes, Norman. 



Temora longicornis (Miiller). Sagitta. 



Euchozta norvegica, Boeck. Ctenophora. 



Larval decapod Crustacea, rare. 



19. This gathering consisted of one haul of the tow-net at 'Jackal 

 Station No. XVII. ' : it was collected at the surface of the water at 10 a.m. 

 the 5th of August 1896 (the net being towed for 15 minutes). 



This gathering measured about 10 - 5 c.c, the larger portion of which 

 consisted of Calanus. The only other species observed were Pseudocalanus 

 elongatus and Acartia Clausii, both of which were rare. The number of 

 Copepoda in this gathering was, approximately, 3500. 



20. This gathering consisted of one haul of the tow-net at the same 

 station as No. 19, and at the same date : it was collected at the surface at 

 2 p.m. (the net being towed for 15 minutes). 



The contents of the tow-net measured about 14*5 c.c, about a fourth 

 part consisting of Radiolaria, Infusoria, and Diatomacea. The Entomo- 

 straca, which numbered about 3600, consisted chiefly of Calanus; the 

 other species that Avere observed were all of more or less rare occurrence. 

 Their names are as follows : — 



Calanus finmarchicus (Gunner). Metridia hibernica (Brady and Robert- 



Pseudocalanus elongatus, Boeck. son). 



Temora longicornis (Miiller). Acartia Clausii, Giesbrecht. 



Parathemisto (?) gracilipes, Norman. 



also a few Ctenophora and larval Crustacea. 



21. This gathering consisted of one haul of the tow-net at the same 

 station, and on the same date, as the last: it was collected at 3.30 p.m., 

 and was a surface gathering (the net was towed 15 minutes). 



The contents of the tow-net measured 23 c.c, including about T5 c.c. 

 of diatomaceous matter. The remaining 21*5 c.c. consisted almost 

 entirely of Entomostraca, chiefly Calanus. The following are the names 

 of the species observed, all of which, with the exception of Calanus, 

 were more or less rare : — 



Calanus finmarchicus (Gunner). Acartia Clausii, Giesbrecht, rare. 



Lucalanus elongatus (Dana), one. Oithona (?) similis, Claus, very rare. 



Pseudocalanus' elongatus, Boeck, Evadne Nordmanni, Loven, rare. 



very rare. Microniscus calani, G.O. Sars, three. 



Temora longicornis (Miiller), very (?) Clavelina, one small group. 



rare. 



