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Dentalium agile and Nesera obesa were the most numerous, and with various Annelides and 

 Crustacea. It occurred chiefly in a single confined area, at the distance of about 1 Nor- 

 wegian mile from land, but here in quite unusual abundance. In one single haul I once got 

 up in the dredge no less than 5 more or less perfect specimens. As often as I removed a 

 little from that place, which could only be found with great trouble, by reason of its great 

 distance from the shore, the specimens became immediately very scarce. Whether this 

 particular spot on the bottom of the sea offered any specially favorable points for the thri- 

 ving of the species, I have not been able to ascertain. I should be more inclined to pre- 

 sume that this congregation of individuals was only temporary, and mainly to be considered 

 as connected with the propagation of the species taking place just at that time. 



