FOOD HABITS OF SHOAL-WATER DUCKS. 49 
TasLe I.—Items of vegetable food identified in the stomachs of the ducks treated in this 
bulletin cnd the number of stomachs in which found. 
| Gad- | Bald- 
| wall. | pate. 
Blue- | Cinna- 
winged} mon 
teal. | teal. 
Kind of food. 
Total number of stomachs examined.........-...- }> 417 255 653 319 41 790 413 
» 
SUBKINGDOM EUTHALLOPHYTA. 
Unidentified algae.............------ cists See acee™ 
OLdOgOnvLMN Sars ceerecseennec nt oo tees ae is se 
SPirogyTA SP..-..ssecseee Sante cece ee cc ee 
Chara SPs (UUSKZOTASS) se ce ciciecis -sciatoce ss Sas <a 
INGECIUES Di see cictecies ss BOCA Sabo CREoSe non Cana 
Wirt dentitiedvll CHENS se sarciwisieisielne cidi~ se> mere sicieis« <1-fol- 
SUBKINGDoM PTERIDOPHYTA. 
’ Marsileaceae. ‘ 
Marsilea sp. (pepperwort).........------------ 
Equisetaceae. 
Equisd@um sp. (horsetail)..-....2.<---.-:-:---- 
SUBKINGDOM SPERMATOPHYTA. 
Pinaceae. 
Picea Sp (Spruce), needles. = .c. sjaciee asec in| aa 
Taxodium distichum (bald cypress), cone scales. 
Taxodium distichum (bald cypress), galls......-.|-....-- 
PALOCULM EST = (CYMLCSS) secs eine niiae ioe = ene laice eel ase we 
_ Sparganiaceae: 
Sparganium eurycarpum (bur reed)....-.------|------- 
Sparganium androcladum (bur reed)...--------|------- 
Sparganium'sp. (bur reed)... --. <--5---2.----== 
Naiadaceae. .-- 
UWimi d enbified saw neces e a wins eee Seri oe okt 
Potamogeton natans (floating pondweed).---..--|-..---- 
Potamogeton americanus (long-leaved pond- 
Potamogeton heterophyllus (variable pondweed). 
Potamogeton perfoliatus (curly pondweed)......|-..----|------- 1 
Potamogeton zosterifolius (eelgrass pondweed)..|...----]--.----|-------- 
Potamogeton fresii (Fries pondweed)...-------- 
Potamogeton pusillus (small pondweed)...-.---- 
Potamogeton diversifolius (curly pondweed). - -.|---.----}- 
Potamogeton foliosus (leafy pondweed)...------|------- \eae aul sralens cess sae ae | 
Potamogeton pectinatus (sago pondweed).---.-- 
Potamogeton sp. (unidentified pondweeds)..-- - 
Ruppia maritima (widgeon grass)-.-....-.------- 
Zannichellia palustris (horned pondweed).--- -- 
Zostera marina (eelgrass)......----------------- 
Najas marina (large bushy pondweed)..-.-.----|------- 
_  Najas fiexilis (bushy pondweed).....----.--- ee 
Juncaginaceae. : 
Triglochin maritima (arrow-graSS) ..-..-.-------|------- 
Alismaceae. 
(limidentitiedess teen sce eeec. ne cele ee 
Sagittaria latifolia (wapato).........-.---------|------- 
Sagittaria teres (Slender arrowhead) ..-.-.-.-.------]------- 
Sagittaria platyphylia (delta potato)...--.-.----- 
Sagittaria sp. (unidentified arrowheads)..-.-..-l----.-- 
179375°—20——4 
