ae 
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 
Jinmarchicus, 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 Clausti, Giesbrecht. 
Pseudocalanus elongatus, Boeck. Parathemisto (*) gracilipes, Norman. 
Temora longicornis (Miiller). Sagitta. 
Eucheeta 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 were observed were all of more or less rare occurrence. 
Their names are us follows :— 
Calanus finmarchicus (Gunner). Metridia hibernica (Brady and Robert- 
Pseudocalanus elongatus, Boeck. son). 
Temora longicornis (Miiller). Acartia Clausti, Giesbrecht. 
Parathemisto (2) 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 1-5 c.c. 
of diatomaceous matter. The remaining 21:5 c.c. consisted almost 
eutirely of Entomostraca, chiefly Calanus. The following are the names 
of the species observed, all of which, with the exception of Calunus, 
were more or less rare :— 
Calanus finmarchicus (Gunner). Acartia Clausi, Giesbrecht, rare. 
Lucalanus elongatus (Dana), one. Oithona (?) similis, Claus, very rare. 
Pseudocalanus elongatus, Boeck, Evadne Nordmanni, Lovén, rare. 
very rare. Microniscus calani, G.O. Sars, three, 
Lemora longicornis (Miller), very (?) Clavelina, one small group. 
rare, 
