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UTILITARIAN ZOOLOGY 



been carried on to a considerable extent in several countries with 

 a view to maintain or, if possible, increase the numbers available. 

 The difficulties to be overcome are far less formidable than in the 

 case of fishes, for the female or "hen" lobster carries about her 



Fig. 1217. i, Common Prawn (Palcemon serrattts], 2, Common Shrimp (Crangon vulgaris). 

 3, The Edible Crab (Cancer pagurus,. 4, The Lobster (Homarus vulgaris) 



eggs attached to the under side of the tail, at which time she is 

 said to be in "berry". So long ago as 1887 Captain Dannevig, 

 at the Norwegian fish-hatchery near Arendal, found it possible to 

 rear lobster-fry from the eggs, and such rearing is now resorted 

 to by Scotland, Canada, and the United States, among other 

 countries. * The Aberdeen hatchery, for example, liberated some 



