2G 



Ki<:i'Oirr of commissioN1<:k of fish and fishekies. 



J'Lxpeiinieiits were made by Mr. Vinal X. Edwards for tlie purpose 

 of determining- the times of spawning of different lislies, and the period 

 of incubation and character of tlieir eggs, etc., the results of wliich are 

 's^hown in the followini*" table: 



Datci 



When 



were, 

 taken. 



Fliitfisli. 



Apr. 12 



4-.si)otto(l floiinrtcr. . . ' May 12 



Sand (lab di. .... 



Tautojr May 21 



Sea bass ' Juiie 4 



Squeteasfue June 6 



Mackerel . 



Squid 



Cuuner 



Toadtisli 



Scup 



Lamprey eel . 



Skato 



Codfish 



lionito 



Lobster 



...do .... 

 May l-i 

 MaV 22 

 MaV 28 

 June 14 

 Juno 2 

 Juno 23 



When 



were 

 liatehed. 



Apr. 29 



May 20 

 ...do.... 

 May 2« 

 June 9 

 Juno 8 

 June 9 

 June 10 

 May 27 

 June 28 

 June 18 

 June 17 

 Sept. 27 



Kggs. 



Number 

 liandled. 



102,000 



50, 000 



100,000 



221, 000 



412, 000 



297, 000 



159, 000 



3, 000 



100. 000 



200 



158, 000 



300 



1 



Cliaracter. 



Adhesive, 



sinking. 



Floating. . 



do 



....do 



....do 



....do 



....do 



Sinking.. . 

 Floating. . 

 Sinking. . . 

 Floating.. 

 Sinking. .. 



...do 



Floating.. 



do ... .. 



Sinking. .. 



Number 



to linear 



inch. 



* Hatched in fresh water. 



The mean of the salt-water temperatures and densities during the 

 period of egg development is given by mojiths below : 



Month. 



December 

 January . 

 February 

 March..'. 



April 



May 



June 



'J'emper- 

 ature. 



43.1 

 .'i9. :! 

 ;«>. 4 

 3G. I 

 43. :j 

 53.4 

 62 



Density. 



1.0255 

 1. 0256 

 1. 0255 

 1.0255 

 1.0255 

 1.0255 

 1. 0255 



Collections of specimens of marine plants and animals were made 

 throughout the cooler months and forwarded by exjjress to the aquaria 

 at Central Station, Washington, D. C, one consignment transferred by 

 tlie steamer Fish //<f/r/.-c(nn]>rising (100 fishes, crustaceans, etc., repre- 

 senting forty si)ecies. 



1S!)0-1»1. 



Mr, Ah'xaiMlcr .lones was in immediate charge of hatching the cod 

 and llatlish, but being temporarily detached befoi'e the lobster season 

 opened, tlie manipulation of that species was directed by the superin- 

 tendent. 



Cod. — Through the agency of 3Ir. 1. Spindel, 3,000 selected brood cod 

 were ])rocnred, jnincipally from .Nan tucket Shoals, and, as in previous 

 years, held in inclosures till the spawning season. They suffered less 

 mortality than those iiiipoundc<l fhe ])rec('ding season, but on January 



