‘wees 
; 
‘ 
} 
: 
The Relation of Mollusks to Fish in Oneida Lake 195 
Crustacea. Amphipoda (Gammarus). 
15 Cladocera (Alona). 
10 Copepoda, Cyclops strenwus 
1 Cyclops viridis? > GO per cent. 
Canthocamptus staphylinus. 
“Canthocamptus northumbri- 
CULT GFN Se TA ald 5 tessa J 
Maiceratedimanter’ puppets otisah = Beoh. . 35 per cent. 
No. 2 (309). 83 mill. long. 
Crustacea. Cambarus, fragments (part of 
ERO) Phan o. saieudse rola ceeire Eimear 25 per cent. 
1 Gammarus fasciatus ..... e ‘ 
1 Hyallela knickerbockeri.. . \ Bote eee 
Mollusca. 1 Planorbis hirsutus ...... B : 
’ 3 Amnicola lustrica ....... eee 
Insecta. Fragments (probably Odonata) 5 per cent. 
Plants. Filamentous alge ........... 40 per cent. 
No. 3 (309). 80 mill. long. 
Stomach and intestine empty. 
No. 4 (309). 82 mill. long. 
Crustacea. IHyalella knickerbockeri, frag- 
ments: 4 cate ee eee Per Cent: 
1 Cambarus (6 mill. long)... 25 per cent. 
Insecta 1 Hphemerella nymph....... ) 
1 Chironomid larve ....... 25 per cent. 
ll) Beetletlarva stots on-set 
No 5 (309). 75 mill. long. 
i Crustacea. 7 Cambarus (6 mill. long), 
Withedragmentss So. .).... ch 100 per cent. 
No. 6 (309). 75 mill. long. 
Crustacea. 1 Hyalella knickerbockeri .... 46 per cent. 
l Cyclops strenuus ~..22%:- 2). 1 per cent 
Plants. Filamentous alge and _ plant 
DISSUG ices oo aps) a\srayass feo 2 es 50 per cent. 
Miscellaneous material oi sooo teers ise 3 per cent. 
Boleosoma nigrum olmstedi (Storer). Tessellated Darter. 
Forbes (1880, a, p. 27) has tabulated the food of 12 indi- 
viduals belonging to this genus, 9 nigrum, 2 olmstedi and 1 
camurum. The diet of these species may be tabulated as 
follows: 
Insecta. Diptera, mostly Chironomus larve........... 73 per cent. 
Ephemerida, Ephemeride nymphs............ 8 per cent. 
Trichoptera, Phryganeide larve............. 15 per cent. 
mamntaced. Copepoda, Cyclops 22.0. sae re ed te le eb ae oe 4 per cent. 
