CRUSTACEA IN RELATION TO MAN 247 



have been recorded of 6 inches in total length). It 

 also differs in its habitat, for while P. montagui lives 

 in shallow water, or even between tide-marks, 

 P. borealis occurs at depths of 30 to 60 fathoms in the 

 Norwegian fjords. The recent development of the 

 fishery for P. borealis in Norway is a striking example 

 of the practical value of zoological research. Until 

 1898 the species was hardly known except to zool- 

 ogists, although a small fishery was carried on in 

 the Drammen Fjord, near Christiania. The investiga- 

 tions of the naturalists employed by the Norwegian 

 Department of Fisheries showed that the species 

 existed in vast numbers in the deeper water of many 

 of the fjords, and that it could be captured in abun- 

 dance by means of a suitably-devised trawl-net. As 

 a result, a very profitable fishery was established, and 

 the " deep-water Prawns " are now not only largely 

 consumed in Norway, but are exported in increasing 

 quantities to the English and other markets. 



In the warmer seas the large Prawns of the genus 

 Penczus are of considerable importance. Thus, in the 

 Mediterranean countries, Penczus caramote (Plate IV.) 

 is highly esteemed for food, and P. setifer and 

 P. brasiliensis are largely consumed in the Southern 

 United States. P. monodon and other species are 

 eaten in India. An attempt has been made to send 

 a species of the same genus (apparently P. indicus) in 

 a frozen state from Queensland to the London 

 market. 



