EXPLANATION OF PLATE IL 



Fio. 1. — ^Figure intended to give an idea of the manner ot ex- 

 tracting the eggs from the living fish. 



Fig. 2. — Working-apparatus for hatching: d, parallel canals 

 composing it ; 6, stop-coclc by means of which the stream of water 

 can be regulated; c, long earthen tubs adapted to this apparatus 

 for receiving the fish just hatched. 



Fig. 2a. — Front ~view of hurdles upon which the eggs are 

 placed in the hatching apparatus. 



Fig. 3. — Another kind of hatching apparatus; consisting of a 

 canal (a) of wood or earthenware, of an ordinary fountain (6) and 

 a tub to receive the running water, (c.) 



