274 



ZOOLOGICAL SOCIETY BULLETIN 



In a lengthy paper on this subject, published in 

 1 899, after considerable experiment Edinger arrived 

 at the conclusion, that impressions once received 

 by the fish can be retained, and he does not hesitate 



to state that vertebrates as low as fishes possess a 

 kind of memory. It is a simple process, however, 

 and there are no facts to show that it is accom- 

 panied by the mental process of associating ideas. 



FOUR STAGES OF DEVELOPMENT OF THE COMMON FROG. 



AMERICAN FISHES IN NEW ZEALAND 



AND SOUTH AMERICA. 



THE Inspector of Fisheries of New Zealand, 

 Mr. L. F. Ayson, was in this country recently, 

 on his second trip, for the purpose of securing 

 additional American fishes to be introduced into 

 New Zealand. 



The method of transportation practised by the 

 modern fish culturist is to ship the eggs rather than 

 the fish. Artificially fertilized and half-hatched 

 eggs are placed in damp moss in a series of small 

 compartments in the shipping case, the latter being 

 protected with an outer casing supplied with ice. 



The resulting low temperature arrests develop- 

 ment without injury to the eggs. In this condition, 

 partially hatched eggs of fishes are regularly shipped 

 about the United States from one hatchery to 

 another, the incubating process being completed at 

 the hatchery nearest the waters to be stocked with 

 young fry. 



Large quantities of fish eggs have been carried 

 successfully by employees of the United States 



Fisheries Bureau across the tropics to New Zealand 

 and South America. Millions of eggs of California 

 salmon, trout, white-fish, etc., have reached New 

 Zealand with less than five per cent loss, after an 

 ocean trip of twenty-six days from San Francisco. 

 When Mr. Ayson visited the New York Aquarium 

 he said there was good sport-fishing for American 

 fishes in several lakes and streams of New Zea- 

 land. 



The eggs of American salmon, trout, and white- 

 fish, over a million in number, sent to the Argentine 

 Republic, were transported a greater distance than 

 has heretofore been recorded in the history of fish- 

 culture. After the sea voyage they were hauled by 

 wagon over 200 miles in warm weather to a hatchery 

 in the mountains, where they were finally hatched 

 with a loss of less than ten per cent. 



Messrs. Titcomb and Tulian of the United States 

 Fisheries Bureau, after carrying this splendid work 

 to its successful conclusion, both visited the 

 Aquarium on their return and gave an interesting 

 account of their building of the first fish hatchery 

 in South America. 



