26 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
Experiments were made by Mr. Vinal N. Edwards for the. purpose 
of determining the times of spawning of different fishes, and the period 
of incubation and character of their eggs, etc., the results of which are 
shown in the following table: 
| Date. | Lggs. lemper- Tene! 
ies a eas Se ee ature | ature | 
Mon ial When When No. of i Nambar when when 
egos egos days | Number Gharacter | fommearit foes eges 
were were iateh-)|thandled. || eee oh ar) were were 
taken. ( hatched.| ing. Hoge es | taken. |hatched. 
| | | 
| | | | ° fs) 
WiatitiShe 2s. -- ane | Apr. 12] Apr. 29} 17 | 192,000 | Adhesive, 22 | 38 46 
| | | sinking. | 
4-spotted flounder... May 12 | May 20 | 8 50,000 | Floating. 26 Nese 95g! 56 
Sand dab ....... ee ee docs Wescdos.. | 8 100: 0004) seu-doie a. 24 51 | 56 
PINE OMe a alesse ae | May 21 | May 26 5 etl, OO?) xtart OO eareners 26 56 56 
DOMES cccosenc- s- June 4] June 9 5 412 000M Ee eetLOnes see 26 Wee 5%!) 60 
Squeteayue.-....--. ; June 6] June 8 2 207, OOU)|\a ae O tam me 28 60 60 
Miackerel.<.. 2.3 =<... So 2Ghiy seal) diraiey 2) 3 L5ONO00w seen Om eces 24 60 60 
pst LLU Re eae May 13} June 10 26 5) 000) |e suit Ome |e ee eee te IF Sei Gi 
Gumnzen so eases May 22 | May 27 5 100,000 | Floating. - 26 56 56 
Moaduis hic. 2 lc sinions May 28 | June 28 3 | 200 | Sinking. - - 5) 56. |. - 65 
WCW ees: f= see eee June 14 | June 18 4 | 158,000 | Floating. 26 61 63 
Lamprey cel -.-..--. June 2} June 17 i | 300°] Simlsing~-|---- == 2 == *70 70 
SMEG) SSeS oe neice Se June 23 | Sept. 27 Some 1) eC es see ae [:G-esehber G4 66 
Codtishix 7 saeee Bee eeeae seealeck he seeau le omaesee Vohn sare. Floating -. 18 (jist. scale ees 
TESTU Rava ten es ele Sie FS Se ERT SYS Ge | eg ee 2 eee ee oon estaee ES LAG) mache 20° | 13.23 2.¢)se2eeeeee 
WODStELse on asec Sees leotaeee Seale ceo sealbe ees aeu \ sa tees ..-.| Sinking... TS esc sees ESacsses- 
| | 
* Hatched in fresh water. 
The mean of the salt-water temperatures and densities during the 
period of egg devolopment is given by months below: 
Month. spe ee ~| Density. 
| 
December pee nesses eee 43.1 | 1.0255 
QUEEN aoa eens pcbeqoe eos 39.3 | 1.0256 
INSET te ko eeckeceeeade seis 36.4 1. 0255 
March 822. 225..222 -ston sean 36.1 1. 0255 
VATD Rls ee age ee en 43.3 1. 0255 
May soccee a. seca ec eee 53. 4 1. 0255 
WUNC as aes sae ee Se eee ias 62 1. 0255 
Collections of specimens of marine plants and animals were made 
throughout the cooler months and forwarded by express to the aquaria 
at Central Station, Washington, D. C., one consigninent transferred by 
the steamer Tish Hawk comprising 600 fishes, crustaceans, ete., repre- 
senting forty species. 
1890-91. 
Mr. Alexander Jones was in immediate charge of hatching the cod 
and flatfish, but being temporarily detached before the lobster season 
opened, the manipulation of that species was directed by the superin- 
tendent. 
Cod.—Through the agency of Mr. I. Spindel, 3,000 selected brood cod 
were procured, principally from Nantucket Shoals, and, as in previous 
years, held in inclosures till the spawning season. They suffered less 
mortality than those impounded the preceding season, but on January 
