76 FISH CULTUEE. 



gether, to a certain point, in wet moss; if this, on 

 further experience, be found to be so, much trouble 

 and risk will henceforth be avoided. This, however, 

 is an experiment for the future. 



If it, nevertheless, be desired to send the ova by an 

 attendant, then the matter is simple enough. The 

 ova should be placed in a can with a perforated lid : 

 not more than one-third ova to two-thirds water. 

 If the journey is to be made by rail, a stout stick 

 rested upon the opposite seats, upon the middle of 

 Avhich stick the can may be swung by the handle, 

 will be found to answer the purpose ; or the stick 

 may be supported on the knees of the attendant 

 where this is inconvenient, and the can swung 

 between them. A very little occasional attention 

 to prevent too violent oscillation is all that is 

 needed. In this way, I have conveyed thousands 

 of ova long distances, with scarcely any loss at all. 

 Coolness and fresh water are both, of course, very 

 desirable, if they can be obtained. 



To send ova a long distance, the safest way is, un- 

 doubtedly, to wait until the eye of the embryo 

 becomes visible in the egg, and then to pack the eggs 

 in wet moss, when they can safely be sent long 

 distances. The plan adopted at Huningue is as 

 follows : — A wide-mouthed bottle, five or six inches 



