G. GENERAL NATURAL HISTORY AND ZOOLOGY. 325 



of the surrounding parts resist the chisel of her mate. Mr. 

 Buller has sometimes observed the male remove the decayed 

 portion without being able to reach the grub, when the female 

 would at once come to his aid and accomplish with her slen- 

 der bill what he had failed to do. He noticed, however, that 

 the female always appropriated to her own use the morsels 

 thus obtained! 12^1, July 18,1872,219. 



PEDALION MIRA, A NEW MICROSCOPIC ANIMAL. 



A very remarkable microscopic animal is described in the 

 Quarterly Journal of Microscopic Science, by Dr. Hudson, un- 

 der the name oiPedalion mira, being a rotifer, with six large 

 appendages, like the limbs of a crustacean, terminating in plu- 

 mose hairs, and worked, as locomotive organs, by transverse- 

 ly striped muscles attached inside the appendages, which are, 

 therefore, hollow, and identical in type with the limbs of in- 

 sects and Crustacea. The animal possesses at the same time 

 a fine ciliated trochal disk, and a gizzard similar to that of 

 other rotifers. The editor of the journal was supplied with 

 specimens by their discoverer, and confirms his statements in 

 every particular. 15 A, October 5, 1872, 435. 



AQUARIUM AT THE VIENNA EXPOSITION. 



One of the most striking features of the Vienna Exposition 

 of 1873 will be a gigantic aquarium, to cost $175,000, and to 

 be constructed by Mr. Driver, the architect of the Crystal 

 Palace aquarium. It will be built under the direction of Mr. 

 Lloyd, the superintendent of the same establishment. The 

 nearest sea-port, Trieste, is twenty hours distant by a fast 

 train, and it is expected that the cost of the freight on the 

 water to be~ used will amount to 15000. The tanks will con- 

 tain nearly 200,000 gallons of sea-water, weighing about 

 2,000,000 pounds. 



If this experiment be a success, there is nothing to prevent 

 the construction of similar establishments in almost any city 

 in the United States, and no little attention will be evoked 

 to the practical workings of this branch of the Vienna Expo- 

 sition. 



In this same connection we may state that one of the ap- 

 pendages of Dr. Dohrn's new T ly-established aquarium at Naples 

 is to consist of a tank mounted on a railway car, in which 



