ay, Journal of Entomology and Zoology 
many winter eggs of Crustacea. Aside from the few cases of Euglena, Parama@cium, 
Diffugia and Arcella met with, almost all of the remaining food was plant. No 
attempt was made to make any quantitative observations on the plant materials 
found. In number of individuals and actual amount of substance the diatoms were 
very important; many desmids, some filamentous algae, and quite large amounts of 
wood-fibers and tracheids, bits of leaves and other broken down plant tissues were 
found. This is another bit of evidence in the rather vast amount which has now 
accumulated to show the great importance of the diatoms in aquatic biology and 
ecology. Table 9 shows in a relative way the frequency of occurrence of the various 
forms of food. 
TABLE 9 
The Frequency With Which the Various Species of Tadpoles Contained 
the Various Food-forms. . 
, 
Pick- 
Bull- Green Wood- erel Meadow Tree- 
frog frog frog frog frog Peeper toad ‘Toad 
Specimens opened 3 10 7 4 4 3 2 
DIATOMS 
Epithemia 1 1 2 1 1 1 
Navicula 2 6 5 4 5 2 3 2 
Pinnularia 2 1 1 2 3 1 
Diatoma 2 4 2 4 2 1 
Synedra 1 4 1 2 2 1 1 
Nitzchia 1 4 1 2 
Cymbella 2 1 1 1 1 
Meridion 2 2 1 1 
Eunotia 3 2 1 
Gomphonema 3 1 3 1 
Miscellaneous 1 2 2 2 
FILAMENTOUS ALGAE 
Zygnema 4 1 2 1 
Ulothrix 1 1 
Spirogyra 1 4 1 2 2 
ladophorameencenmuristent rect nicest 1 1 
INS} 61 20) FU COGS AG SESE Goch Ocs cera 2 a 2 1 
NIGSCelMAME DGS) Wareiats eels sictolcte es eieinyeiepeisicinre 1 1 3 
BLUE GREEN ALGAE 
ORGIES Gonporapgend coon hb oc poroodo 2 3 2 1 1 1 2 
EMCEE STE 6 gion cob C008 bin O07 as CoOnRCbon 1 2 
OTHER ALGAE 
CSTOsterscimiel arosicyesaremiererne cle aclale ile carnal nerd 1 1 3 1 
Gosrianiim ssaycevos ti claisrsisinaevereret js nicieiata ere 2 3 
EGLASETIma) tele, o.0ietcl-wic Saieainraeieeions 3 
Desmidium 2 
Pleurotenium 2 
Scenedesmus 1 4 1 2 
GocconeiSige ects cetera sre reise somere 1 1 
Merismopedia ....... aie ake one eibsali Go diate eteia 2 
AGT ATA heise tars, ccn stead bateete ira eres 2 2 1 2 
PROTOZOA 1 1 1 
ROTIFERA ...... 1 
CRUSTACEA 1 1 
EGGS OF CRUSTACEA 1 1 2 
The figures given in this table indicate the number of stomachs in which the 
various forms occurred, as no attempt was made to keep a count of the number of 
times any one form was found in a given stomach. 
Comparison of Young Transformed Individuals of the Various Species. 
Just a glance given at the data of the transformed individuals of the eight 
species as presented in the preceding pages, will show in a general way that their 
food consists largely of insects with some spiders, mites, and other forms, largely as 
