The Relation of Mollusks to Fish in Oneida Lake 233 
No. 14. Body 154 mill. long (114). 
Stomach empty. Intestine with digested material, including 
some legs of insects. 
No. 15. Body 112 mill. long (114). 
Stomach empty. 
Intestine, anal end. 
Insecta. Legs and body segments of Odonata 
MYL LS wei cemetaats aoeees ae awa 98 per cent. 
Mollusea. Fragments of shells.............. 2 per cent. 
The three ages deseribed above may be summarized as 
follows: 
Groupe l. Infaney, 25 mill. long. 1 specimen examined. 
MUU GMD. = ays | Sikes .. chs peo eerrer Clete crater siar 20 per cent. 
ImSeeh ary wai stacl. = seth eiecd tgeto eels acy atch (a 80 per cent. 
Group 2. Youth, 40-63 mill. long. 8 specimens examined. 
@rusvaeeae=ts, AAs). SIs. Sear oe aeeetl ent = 65 per cent. 
TMS SC ai acy Ace = cbevsden: shee tsus gay teasbole ape easel 27 per cent. 
INIGTame OG Ee eA oe iees, Pace ical uals fo og 2 per cent. 
VUOUUIS Cate <i. att SRS ots ce taht oy Ma rede et eed ene 2 per cent. 
Pas! . oy bths a syshives « Mercere Pabhatss cates 4 per cent. 
Groupe 3. Adult, 112-154 mill. long. 6 specimens examined. 
IO ER Reda cI Bea riG ee Aibicks poker oper eicra Cacanicie 99 per cent. 
MOIR os Grottologeecle bro nade ooo cae b< 1 per cent. 
The change from crustacean to insect food in groups 2 
and 3 is noteworthy. Group 1 is not conclusive as only one 
specimen was examined. 
Clemmys guttata (Schneider). Speckled Tortoise. 
Surface (1908, p. 166) records snails and slugs among the 
food. These were found in three out of twenty-seven speci- 
mens examined, 
(rraptemys geographica (LeSueur). Map Turtle. 
Hay says of this turtle (1892, p. 576), “ Prof. Henry 
Garman states that an examination of the contents of the 
alimentary canal showed that the food consisted exclusively 
of mollusks, the young eating the thinner shelled species, the 
adults the larger and thicker shelled kinds. At Lake Maxim- 
kuckee three persons caught about 80 specimens of this 
