ZOOLOGICAL SOCIETY BULLETIN 



213 



Fundiihis iihijiilis or F. diaphatium' These and 

 many cither questions have an obviously important 

 heariii;4 upon current discussions of variation, 

 natural selection, etc. 



Incidentally, numerous other experiments are 

 being made upon several species of fish. To what 

 degree do they withstand sudden changes in the 

 density of the water? To what degree is acclimati- 

 zation possible ? Do the salts contained in the blood 

 remain in the same degree of concentration what- 

 ever the density of the surrounding water? To 

 what is death due w^hen a fish is abruptly changed 

 from fresh to salt water or vice versa? Under 

 what conditions does the fungus Saprolegnia attack 

 fish? It is at present impossible for me to give 

 satisfactory answers to any of these questions, but 

 it is hoped that the present experiments may aid in 

 their solution. Francis B. Sumner. 



DR. MAYER'S BOOK. 



The manuscript and illustrations for a work on 

 the invertebrates of the New York coast, presented 

 to the Zoological Society by Dr. A. G. Mayer, Di- 

 rector of the Marine Biological Laboratory at the 

 Tortugas Islands, Florida, is now in the hands of 

 the printer, and will be issued in the near future. 



In accordance with Dr. Mayer's wishes the 

 profits accruing from the sale of the book will be 

 devoted to the improvement of the New York 

 Aquarium. Although this work will be accepted 

 as authoritative from a scientific point of view, 

 having been carefully prepared by a professional 

 zoologist of the highest standing, it is thoroughly 

 popular in character. Dr. Mayer's studies of the 

 invertebrates have been conducted both in the 

 field and in the laboratory. He is not only well 

 acquainted with the invertebrates of our own 

 coast, but has studied marine life in Japan and 

 among the islands of the South Pacific Ocean. 



During the winter of i8qg-igoo he was a member 

 of the scientific staff of the United States Steam- 

 ship "Albatross," engaged in deep-sea explora- 

 tions in the Pacific. He is the joint author with 

 Professor Agassiz of a number of important sci- 

 entific papers on invertebrates. 



The book will be placed on sale by the Zoological 

 Society at the Aquarium and elsewhere, and will 

 constitute the first volume of the New York 

 Aquarium Xalure Scries. It is intended chiefly as 



a guide to the sea-shore life of the New York coast 

 and will be of value to teachers and to nature- 

 students generally. It presents the facts of modern 

 zoological investigation so clearly, and is so pleas- 

 antly written, that it will be attractive to the general 

 reader. 



The illustrations are from original photographs 

 made bv tlie author. 



.Mtendancc. — The attendance at the New. York .\qua- 

 rium during the year 1904 was 1,625,770, an increase of 

 77,879 over 1903. The daily average for the year was 

 4.454- 



GENERAL INFORMATION. 



Admission to the Park.— On all holidays and on Sunday. Tues- 

 day. Wednesday, Friday, and Saturday, admission to the Zoological 

 Park is free. 



On every Monday and Thursday, save when either of these days 

 falls on a holiday, only members of the Society, and persons holding 

 tickets from the Society, are admitted free. All others pay twenty-five 

 cents for each adult, and fifteen cents for each child under twelve years 

 of age. Tickets are sold only at the entrances. 



Admission to the Aquarium is confined to members on Monday fore- 

 noons. It is open to the public from May i to October 31, 9 a.m. to 

 5 p. M., and from November i to April 30, 10 a. m. to 4 r. m. When a 

 holiday occurs on Monday, the forenoon will be available to the public. 



Opening and Closing.— From May ist to November ist the en- 

 trance-gates will be opened at 9 a. m. and closed half an hour before 

 sunset. From November ist to May 1st, the gates will open at 10 a. m. 



EicvCLES must be checked at the entrances (five cents). All wheels 

 not called for half an hour before sunset will be locked up until the fol- 

 lowing day. 



Restaurant. — .At the Rocking Stone Restaurant meals are served 

 a la carte ever>- day from 10 a. m. to the closing hour. The North 

 Pavilion of this building has a spacious lunch counter, where all kinds 

 of luncheon food are ser\*ed at popular prices. 



The South Pavilion is now arranged as an open air dining-room. The 

 service has been increased and improved. Large numbers can be 

 served expeditiously. 



publications 



FIRST ANNKAl, RK.l'ORT P.i per. 40 cents 



SECOND " •■ ... Paper, 75 cents. Cloth, «i. 00 



THIRD ■■ •• . . . •• 40 •• •■ 0.60 



FOURTH •• •• ..." 40 •• ■• 0.60 



FIFTH •■ " ..." 75 •• •■ i.oo 



SIXTH •• •• ..." 75 '• •• ■•«> 



SEVKNTH " • ..." $1.00 " 1. 25 



EICHFH " " ..." 1.00 " :.25 



NOTES ON THE MOUNTAIN SHEEP OF NORTH 



AMERICA. (Hornaday) Paper, 40 cents 



DESTRUCTION OF OUR HIRDS AND MAMMALS. 



(Hornaday) '5 " 



THE CARIUOU. (Crantl P.aper, 40 " 



THE ORIGIN AND REL.'\TIONSHIP OK THE LARGE 



MAMM.\LS OF NORTH AMERICA. (Cram.) Cloth. Si.oo 

 GUIDE BOOK OF THE ZOOLOGICAL PARK. With 



maps and illustrations. (Hornaday) 25 cents 



VIEWS IN THE ZOOLOGICAL PARK. Size 5x7. lo 



illustrations 25 " 



POST CARDS. Various subjects Two cards. 5 " 



POST CARDS. Colored One card, 5 " 



HUI.LETIN No. 1 50 " 



BULLETIN Nos. 2. 3. and 4 10 " 



BULLETIN Nos. s to 17 ij " 



The publications are for sale at the OJicf 0/ the Society, 11 U'nl! 

 Street, The Zoological Park, and The Xe-iv Vork Aquarium. 



