34 
TaBLe I].—IJtems of animal 
in which found—Continued. 
BULLETIN 720, U. S. DEPARTMENT OF AGRICULTURE. 
food identified in stomachs of mallard ducks and the number 
Kind of food. 
Common 
mallard. 
Totalmnumpbenofistemachsiexamine dees seen eee eee ee eee eee ee oie 
CLASS Gastropoda (UNIVALVES)—Continued. 
Triforide. 
Triforis sp 
Cylichnide. 
CUVCh iG CON GIICULEED eat red aes ee ea ee eo 
Zonitide. 
VEER COIS Dereon tS ee os ae ei ee ee 2 ala enya oe ee ee tome 
Helicide. 
Polygyra espiloca 
POLI GURUS) seo ee ee ee ees BO er tear a ge Sia ee 
Pupide. 
Vertigo sp 
Succineide. 
Succinea avara 
Auriculide. 
IVTCLOINDUSIOULENLOLUES ie, So ee ee ee oe ee eS nee eee 
Lymneide. 
Lymneza columella 
EY INTE OD ALUSETIS Se) fs. merce oe oe OO ee ae eee 
Lymnza techella..... 
TYNE ET WIC OL UG Rohs ee ee Aiea ag ei en ee ere 
Lymnza sp 
EPACTUON DIS QLAEDOTVCTUSIS Wyma tsa tyre Ee eee eee 
ENAIVOTDISICHNUDOTALLALUS pa a eee 
Planorbis dilatatus 
PUGRORDIS CUT Yi ee Fs ee So yin yh Re Begs Rae 
Planorbis exracuous 
ALG OF OUST AT SUE IES shart RNA Heels oe Ne org ae ate eet en 
. Planorbis opercularis..-....- ee ee rents RES Same IG cages Ua tween i ae 
(PIGNOTDIS PATUUS x38 oe No Sy oA Oe A ee Se ee | 
Planorbis trivolvis 
Planorbis vermicularis 
Planorbis wheatleyi 
Planorbis sp 
Pompholyx Costar) ook oi ne Ue prt ee ee ees 
Segmentina armigera 
Segmentina obstricta 
Physide. 
Physa ancillaria 
Physa heterostropha 
IP NY SQiS Dicks obs scperoe Sele Ee ean eee 
CLass Pelecypoda (BIVALVES). 
Winidentified tects: < jcc ot et ae eee eee 
Myide. 
Mya arenaria (soft-shell clam) 
Mactride. 
Mulinia lateralis 
Rangia cuneata 
Tellinide. 
MOOT USCH we -tretayainletclate Sicliyaie = sania etamree e sedte he eee cei e ee eat 
1, 725 
Southern 
ae black 
: duck. 
622 51 
1 Up eee Ste aed = 
hy | eevee ea 
gE eae et eta 
AS eee cit 
aaa Acne Vs, cyauestel ero mgt 
1 es 
ae pe } 
d Le Pose aie opt 
Ds i OR at 
nets eae 4 
oct bas 3 7 
| Fea Ie Bk hea 
| ss eas fictom eae 
eerie eae | occ a a 
fi ee 
2 2 
9 | 1 
iL | here ey 
Se ets 1 
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