FOOD OF YOUNG WINTEE FLOUNDERS. 5 



3. Length. 31. — Food: Copepods, 95; debris, 5. Entozoa: 247 appendiculate dis- 

 tomes in stomach. 



4. Length, SI. — Food: Copepods, 30; debris, mostly sand, 70; alimentary canal nearly 

 empt\'. Entozoa: 145 appendiculate distomes in stomach. 



5. Length, 37. — Food: Amjihipods, 50; copepods, 10; debris, 40. Entozoa: 3 ap- 

 pendiculate distomes in stomach. 



6. Length. .',7. — P^ood: Annelids, 40; copepods, 10; zoeae, 10; ostracodes, 10; amphi- 

 pods, 10; debris, 20; small fragment of Sagartia. Entozoa: 12 appendiculate distomes 

 in stomach, 4 small nematodes. 



7. Length, 40. — Food: Amphipods, 20; curaacea, 20; copepods, 5; Crepidula, 5; 

 ostracodes, 5; annelids, 30; debris, 15. A small frapjment of the body wall of a s\Tiapta 

 was noted. Entozoa: 200 appendiculate distomes in stomach. 



8. Length, 4?). — Food: .\mphii)ods, 10; zoe?p, 10; copepods, 10; annelids, GO; debris, 

 10. Entozoa: 24 appendiculate distomes in stomach. 



9. Length. 44- — Food: Amphipods, 65; copejmds, 10; ostrac<Kles, 1; Sagartia, 5; 

 nemerteans, 5; Crepidula, 5; debris, 6. Entozoa: 24 appendiculate distomes in 

 stomach, 3 in intestine; 4 small nematodes, lentrth 5. 



10. Length, 44- — Food: .Am))hipods, 25; ostracodes, 25; copepods, 25; Crepidula, 5; 

 debris (fragments of Crustacea), 20; 1 zoea noted. Entozoa: 80 appendiculate dis- 

 tomes in stomach, 3 small nematodes. 



11. Length, 48. — Food: Amphipods, 90; d^'bris, 10; one small insect larva (Chiro- 

 nomus) noted. Contents of alimentary canal almost completely digested, its nature 

 revealed only when tlie comjxjund microscope was used. Entozoa: 4 distomes. 



12. Length, 4'h — Food: Amphipods, 90; d<'bri.'', 10; 1 insect larA-a noted. 



13. Length. 52. — Food: Amphiyxxls, SO; Crepidula, 20. 



14. Length,. "iS.— Food: Amphipods, 100. 



15. Length. 11.5. — Fof)d: Amphiiuids, 50; Crepidula, 10; dei)ris, 10; 1 small annelid 

 noted. Entozoa: A few sporozoan cysts on wall of intestine. 



1(). Length. 120. — Fomi: Amphipods, 95; crabs, 1 ; Crepidula, 2; (h'bris, 2. Entozoa: 

 Sporozoan f>st8 on intestine. 



17. Length, 120. — Food: .Vmpliipods, 80; crabs, 10; Crepidula, 2; debris, S. Entozoa: 

 A few sporozoan cysts on intestine. 



18. Length. 120. — Food: Amphi|X)d8. 15; crabs, 15; Limulas, 15; Crepidula, 5; anne- 

 lids, 45; debris, 5. 



19. Length, 12.5. — Food: .Vnnolids, 95; dc'-bris, 5. 



20. Length. 130. — Food: Limulus, 2; clams, 50; (Vepidula, 15; annelids, 3; d(''bris, 30; 

 a few strands of algae. Entozoa: 1 fli.stome. 



21. Length, 135. — Food: Amphipods, 9K; crabs, 2. Entozoa: 2 distomes. 



22. Length, 135. — Food: Amphipods, (iO; crabs, 30; shrimp, 5; giustropods, 5. 



23. Length. 140. — Food: Amphijiods, 5; crabs, 2; Limulus, 1; bivalve mollusks, 2; 

 annelids, 90. Tiic mollusks were a small Crepidula and fragments of a small elam. 

 Entozoa: 3 distomes. 



24. Length, 1,50. — Food: Amphipods, 8; spider crab.s, 3; clam, 1; annelids, SO; 

 d<'*bri8, 8. 



25. Length. 170. — Food: Nothing in alimentary canal that could be identified e.xcejit 

 a few fragments of algre and what a7)peare<l to be remains of the mantles of clams. 

 Entozoa: 1 distome. 



2G. Length, 190. — Food: Amphipods, 5; mollusks (small clam and small gastropod), 

 15; annelids, 75; d(!'brifl, 5. Entozoa: 2 distomes. 



Summarized Record of Food and Parasite.s of 398 Small Winter Flounders 



(P.SEUDOPLEURONECTE.S AmKRICANUs) COLLECTED AT WoOD.S HOLK, Ma.SS., 



AND Vicinity, 1915 and 191G. 



[Figures referring to food represent average per cent of volume; figtires referring to para.site.s, where not 

 otherwise indicated, represent numerical average. The lengths arc given in millimeters. The staliojis 

 have been arranged according to dates as if of cue year.] 



STATION 1. OREAT HARUOR, MAY 2, 1016. 



Length, 26 to 50. — Number examined, 1. Food: Amjihiixids, 85; Cumacea, trace; 

 insect larvse, 1; (U-hna, 14. Parasites: Distomes, 4. 



Ijength, 51 In 75. — Maximum length, 72; mirdmum, G4; average, 70.8. Number 

 examined, 4. Food: Amphifxxls, 48.8; annelids, 17.5; ropeporls, trace; insect larvte, 

 1.5; d*'-bris, 32.2. Parasites: Distomes in each, average 16; Sporozoa, 8 small cysts 

 on int<^!8tinal walls of one. 



Ijcngth, 7(1 to 100. — Ma.ximum length, 97; minimum, 70; average, 87.7. Number 

 examined, 3. Food: Ampliii)ods, 20; annelids, 4S.3; shrimp, 30; d<'-briH, 1.6. Para- 

 eitee; Distomes, 2.3; nematodes, I young Ascaris in stomach of one fish. 



