210 THE SCIENTIFIC RESULTS OF V 



Crustacea exist in the English and Scotch lakes. It 

 is quite possible that a proper knowledge of these 

 Crustacea may at some future day be of value in 

 attempts to cultivate fish in British lakes. Marine 

 birds and mammals are exhibited in various parts of 

 the Exhibition. Dr. Francis Day exhibits his great 

 collection of Indian Fishes^preserved in spirits, and 

 accompanied by the coloured plates of his great book 

 on Indian Ichthyology : he also exhibits a collection 

 of British fishes carefully preserved and named. The 

 American department is remarkable for the carefully 

 coloured series of casts, representing different species 

 of the American food-fishes, and for samples of the 

 animals of lower classes obtained from considerable 

 depths off the American coast. Complete collections 

 of the edible Crustacea and mollusca of the United 

 States, and of the commercial sponges of the coast of 

 Florida, are also exhibited. 



Under the second head — viz. General Morphology 

 and Physiology — there is very little to be noted in 

 the Exhibition. In fact, when we have mentioned 

 the series exhibiting the growth of the salmon from 

 the egg onwards, exhibited by Professor M'Intosh of 

 St. Andrews, and the series of flat fishes of various 

 ages in Mr. Oscar Dickson's collection — there is nothing 

 except the valuable drawings of the anatomy of the 

 oyster, and of its development from the egg, ex- 

 hibited by the Netherlands Society of Zoologists. 

 Under the auspices of this Society, which possesses a 

 movable house fitted as a zoological laboratory, which 

 can be erected for temporary use on any part of the 



