1056 



ZOOLOGICAL SOCIETY BULLETIN 



CRAYFISHES 

 The larger from Michigan, the smaller from New York 



foods they are accustomed to find among the 

 coral reefs. 



Round Sting-Ray. — The Aquarium has for 

 several months had a specimen of the Round 

 Sting-ray (Urolophu.s jamaicensis) , common 

 in the West Indies, but hitherto known on 

 the coast of the United States from a single 

 small specimen. As no figure of it has ap- 

 parently ever been published, the cut in this 

 Bulletin will be of interest to ichthyologists. 

 The photograph was made in the Aquarium 

 by Dr. R. C. Osburn. 



The Letters of a Great Scientist. — Through 

 the kindness of the author, Mr. G. R. 

 Agassiz, we have received a copy of the 

 recently issued "Letters and Recollections of 

 Alexander Agassiz." 



It was our good fortune to be attached to 

 the U. S. S. Albatross during the deep-sea 

 investigations made in the South Pacific 

 under the personal direction of this distin- 

 guished oceanography. On one of these 

 voyages the Albatross succeeded in making 

 the deepest haul of the dredge ever made 

 by any vessel; south of the Tonga Islands 

 the dredge brought up animal life and bot- 

 tom specimens from a depth of 4.173 fathoms 

 or more than four and a half miles. On the 

 same voyage the Albatross made a sounding 

 of 4,813 fathoms or nearly five and a half 

 miles. Many of the letters relate to the 

 work of Agassiz in the ship's laboratory, or 

 on the coral reefs of Polynesia. They were 

 addressed to men of science in many countries 

 and to personal friends. 



One of them deals with his visit to an- 

 other celebrated oceanographer, the Prince 

 of Monaco, who recently visited New York 

 in his own deep-sea exploring ship. 



ROUND STING-RAY (Urolophus jamaicensis) 

 Photo by R. C. Osburn 



As a whole they reveal the intense interest 

 of a scientist who worked without cessation 

 and with amazing success to the very end 

 of a long life, always drawing freely upon 

 his own great fortune in the furtherance of 

 the ends of science. 



HATCHING GRAYLING AT THE 

 AQUARIUM 



ONE of the gallery tanks at the Aqua- 

 rium contains several hundred Montana 

 Grayling, the largest measuring about 

 five inches and all growing rapidly. 



The eggs were taken at the Bozeman 

 Hatchery by the U. S. Bureau of Fisheries. 

 They were received at the Aquarium May 

 6th and were all hatched by May 17th. 



These fishes would doubtless have grown 

 faster in the space afforded by a fish-hatchery 

 rearing pond, but their present size and con- 

 dition is excellent, considering the limitations 

 of an exhibition tank and the fact that they 

 have had none of the varied insect and other 

 live food to be found in ponds. They have 

 little of the beauty of grayling taken from 

 their cold native streams, but it is nevertheless 

 interesting that we have been able to hatch 

 and rear them in refrigerated Croton water 

 on a diet no more varied than minced beef 

 heart and liver. 



The grayling is essentially a fish of the 

 cold and clear streams of the North and does 

 not naturally inhabit United States waters 

 except in Montana and Northern Michigan. 

 Its range in our waters is being extended 

 somewhat by introduction. 



The grayling is the equal of the trout in 

 food and game qualities. The writer has 

 caught specimens a foot long, above the 



