282 BULLETIN OF THE UNITED STATES

282 BULLETIN OF THE UNITED STATES

FISH COMMISSION.

5.

A

^{section of the}intestinal canal, cut from _{a point}below_{the open-}

ing'ofthecoecumnearest the termination ofthe alimentarytube,spread on _glass. Itexhibits onits

mucous membrane

aninspissatedmatterof a

somewhat

darker

brown

^{color than} that of No._3,

and

the debris of microscopic shells, small enoughto i)ass the_pylorus,but too large to enterthe

mouths

ofthecoeca.

C.

A

^wetpreparation ^ofthe_gullet, stomach,c<Bca,

and

intestine.

7.

A

preparationⁱⁿether ofthe_cceca, their_orifices,and theintestinal exp.ansion ⁱⁿwhich _{they open.}

8. Several dried stomachs (some^{of the last}obtained) unopened, but supposed ^{tocontain thefuci}

and

infusoria described.

The

most_importantof the specimens have been placed ⁱⁿthehands of Lieutenant _Holt, U. S. A.,

who

has _kindlyundertaken to deliver

them

to Dr. WalterF. Atlee, of Philadelphia, ^tobe _presented

by

him, withthis monograph, ^{to the}

Academy

^{ofNatural Sciences.}

[An

^{abstract of this} paper ^will befound in the

December number

(1860) of the Proceedings ^{of the}

Academy

^of N. Sciencesof Philadel- I)hia, appended ^as a continuationof the _reportfrom the _Biological De- partment ^{of the}

Academy

^for

May,

^1860.

By

reference to this report

it

may

^bese^n that the statements

made

inrelation tothe contentsof^the stomachs andthecwcawere abundantly^verified

by members

^oftheAcad-

emy

^{in the} specimens

mounted

for microscopical examination which accompanied ^thispaper.*

Before theshells of the minute organisms ^can be _easilyrecognized, thesolid contentsof the stomachshould be_{thinly spread}on _glass

and

thoroughlydried, in order to remove the _liquid matterwhich renders these smallobjects obscure.

With

_specimens thus i^repared from fish fresh run from the sea during ^the spawning season, examined undera bright sunlight, theinvestigations detailed in ^this i)aper

may

^beeasily

repeated.

Mobile,

Ala., ^October25, I860.]

TBLE

imCROPYliE OF THE

ECJCJ

OF THE 1VHITE PEKCH.

By ^JOH]\

^A.

KYDER.

[Letter^toProfessorS. F.Baird.]

Ihave foundthe micropyle^oftheegg^ofthewhite_perch; it measures .0075millimeteror_-g^^Va iiichin diameter.

Average

^diameterof egg,-^

inch; ^{of oil} sphere,y^o ^inch.

Washington,

^D.

C,

3Iay 17, 1881.

*Asthe vegetablematterinthestomachof thefish isina disintegratedstate,a_lens, generally,^isrequiredtodetermineitsnature.