78 



THE VOYAGE OF H.M.S. CHALLENGER. 



Habitat. — All the specimens of tliis species collected on the Challenger Expedition 

 were caught in the tow-net at the surface of the sea, in many diflferent parts of the 

 ocean. As regards the localities, the date alone was, in most cases, recorded on the 

 labels, the tow-net having been on many occasions resorted to when neither dredging nor 

 trawling was carried on. Hence, the localities for this and other species of Euphausiidse 

 cannot in every case be referred to any of the actual Station numbers. To faciliate this 

 question, I have made an attempt in the following list to specify the tracts of the ocean 

 where the specimens were caught, by comparing the dates recorded with the Stations 

 marked ofl' on the map accompanying the list of Disserving Stations prepared for the 

 use of the naturalists engaged in furnishing an account of the voyage. 



The specimens examined by Dana were collected in the Pacific, near Northern 

 Kingsmill Islands. 



Distribution. — As shown by the above stated localities, this species exhibits a truly 

 astonishing geographical range, having been met with in almost every tract of the 

 ocean traversed by the Challenger ; the North and South Atlantic, the Australian Sea, 

 Celebes Sea, and throughout the Pacific, from lat. 40° S. to lat. 40° N. It has, moreover, 

 been observed b}- Claus in the Mediterranean {Ewphausia milUeri), and a single specimen 

 of the same species was collected l)y myself off the Norwegian coast (Magero) in lat. 

 &2,° 28' N. 



