INSECTS 4. 



LEPIDOPTERA 2 (Caterpillars). 



COLEOPTERA 3,— Carabidae 1 (Agonoderus pallipes), Gyrinidae 1 (larva), 



Scarabaeidae 1 (Aphodiiis inquinatus), Chrypomelidae 2 (Diabrotica 12 — 



guttata and a Haltica Vj. 

 DIPTERA 2 (larvae of gnats). 



ORTHOPTERA 1 (Phaneroptera cnrvicauda, a Tettix and a cricket.) 

 HEMIPTERA 3 (Corixa alternata 2, Anna ? 1). 

 XEUROPTERA 2 (Larvae of Ephemeridae.) 



ARACHNID A 3. 



Spiders 2, Hydrachnidae (water mites) 1. 



MOLLUSKS, 2. 



Gasteropoda 2 (Physa, Planorbis). 



Also an earthworm, some Potamogeton, and a number of unrecognized small 

 seeds. 



19. Blue-cheeked Sun- fish. Lepiopomus ischyrus, Nels. (1). Full of 

 hornwort ( Ceratophyllum demersuui) and a polyzoan (Plumatella ?) ; also 

 fragments of small bivalve shells, some small Crustacea (Asellus, * Allorches- 

 tes dentata, Sm,, and Cypris, sp.j and a little mixed vegetable matter. 



20. Bream. PumpJcin Seed. Eupomotis aureus, Walb. (1). Sev- 

 eral Aselli, univalve mollusks, and some unrecognized vegetable matter. 



PIRATE PERCHES. APHODODERIDAE. 



21. Western Pirate Perch, f Aphododerus isolepis, Nels. (3). The 

 largest specimen (3 in. long) had eaten several Aselli, some larvae of dip- 

 tera, a Corixa and another water-bug — apparently a Gralgulus. The sec- 

 ond in size (24 in.) contained only a small cycloid fish and several larvae of 

 neuroptera. In the stomach of the smallest were several ostracoda (^Cypns,) 

 a larval Corixa and a few gnats. 



MAIGRES. SCIAENIDAE. 



22. Sheepshead. Haploidonotus grunniens, Raf. (7). Mollusks and 

 larvae of 31ay flies, with a few larvae of gnats. 



Unios 2, Planorbis 2, Limnea 1, Ephemeridae 6, diptera 2. 



*See appendix. 



fAn obser\-ation of the intestines shows that one effect of the remarkable 

 change in the position of the vent in this species is the lengthening of the alimen- 

 tary canal and a consequent increase ot the digestive surface. The intestine passes 

 from its origin at the stomach first upward, then backward, then downward, reach- 

 ing the ventral wall at a point about half way from the bases to the tips of the ven- 

 trals. In the smallest specimens, it opens at this point. In the others, it turns 

 forward along the middle hne of the belly, and opens at a point moi-e or less to the 

 front, according to the size of the fish, leaving a seam of naked skin behmd. 



