456 I5TI.T.ETIN OF THK T'NTTKD STATF.S KISII fuMMISSION. 



9. Cysts in liter. [PI. xwii, ligs. 30S, 3(Kt.] 



These cysts, collectetl July 14, 19(M), are a <lefi> n->\ l)r<«\vii. almost l)laik l)y rellecte.l li^'lit. Thi-y 

 are globular, except where they lie so dose as to touch each other. When cleared in acetic aciil their 

 structure is .«cen to Ije concentric .\ granular nucleus of deeper color than the surrounding parts 

 could I )e made out in each, hut could not he iilentilii-d. In one ca.-e two nuclei were seen. Those 

 mea.-'iired varied from 0.2! to O.Sl mm. in diameter, with the exception of one, a very small cyst, 

 which lay lonchin); a larger one and wa.s llalteneil on the touching siilc, whose two principal dianu-ttTs 

 wire 0.06 and 0.1 mm., respectively. It woulil appear that the ti-^^sues of this lish hahilually liuild 

 colloid cysts arounil foreign particles. \ thin outer layer of the cyst is lighter i-oloretl than the inner 

 jiart, anil is eviilently nnmodilied i-onnective tissue. The smaller cysts have essentially the same 

 strui-ture as the larger. They are all confined \o the surface of the liver. 



Morone americana i Rurrus iiinrrirdnii.i), While I'en'h. 



FOOD. 



Fi.sli, shrimiis. and other crustaceans. 



A< A.VrllO(KI>H.\l,A. 



1. Kriiiiiorhi/nrhiis lu/llix Hiidolplii. 1 riti'.-Jtine. I, ]ip. WO— 4!)2, pi. v, tigs. l-ti. !l. p)i. .'i;54-5:!(i, ]il. 



i.ix, figs. 7(>-7"J. 



2. Erliiiiorltynclmx Iheniliis l.iinon. '.i, \<\>. .V2H-.529, pi. i.iv, figs. 12-22. 



TREMATOIlhS*. 



3. IH.'idmum lenue tenuisulmf IadUiu. I'lritiniemii. <». jip. .");5(>-r).'i7, jil. i.n. ligs. H-12. 



4. />«/o/»i/;/i '/(-((//((/Km Ru<lolphi. Intestine. 7, jip. 279, 293-204, pi. \\\i.\, figs. t>0-(>:{. 



5. CyslK iiith tTi'iiiiiUidf urn. Liver, etc. 6, p. 537. 7, p. 279. 



Ceutropristes striatus (Si'rrnniix nlniritt.t). Sen liiiss. lUiirh J{ii.t.i. 



Koon. 

 Fish, sijuid, crahs (Enpaijurxn, Panopcus, Pliiliiimichn.t, etc.). 



.VCANTIIOI KI'IIAI.A. 



1. Krhluorhynclni.'! serrnni. Peritoneum. 3, ])p. .534-53o, |il. i,i\. figs. 73-79. 



2. Eritinorln/iiilin.') mii/illifer lAnton. Peritoneum. See I. i>p. 49;5— tOO, ])l. vi, figs. 1,2. !|, pp. 535-.536, 



pi. i,ix, fig. 80. July 30, 1SS9: in cysts on viscera. 



3. Kcliltiurhynchus jimtt'ii.i Westrnndi. .'^ee I, pp. 496—497, pi. vi, ligs. 3-5. 3, pp. 537-53,S, pi. i..\, 



figs. 85-88. Found among i-ysts <-ollccted in ISS4. 



SEMATOnBS. 



4. Iiiiiiiiiliire nemalode.<< {.\srariii). 



Found fre(|uently in the mesentery, often very abundant, (ieneral charactei-s are nearly uniform 

 diameter. ta|iering at ea<-h end; tail mucronate. Agree with forms found in I'mnnluniiiK, ('yifi.-'i-ioii.ftr. 

 Twenty-three ba.ss, examined Jidy 30, ISSO, had each a large number of thc-e worms, in nio.st cjtees 

 in a tangled ma.s8on the mesentery and pyloric Cfeca. Many of tluw might be referred to the indefinite 

 species Ascaris eapxularirt. 



5. I'iliiriii riihrii Leidy. [I'l. xv, figs. 1S8-191.] 



Found under the skin of a Inu-s, AViishington, D. C, October, 1891. Collecteil by Miss Soplii.j 

 Oberheimer. The worm WiLs bright red when alive. Dimensions of alcoholic specimen, in millimeters: 

 IxMigth, 125; diameter of head 0.4, 5 mm. from anterior end 0.(>5; meilian O.S, 5 mm. from posterior 

 end 0.75, one-half iiiiliinielir fnno posterior end 0.4. 



CEST01>1«. 



6. RliyncliDliiillirlnm, larvje encysted on viscera. 'I, ]). 793, i>l. i.xii. fig. 12. 7, pp. 279-280. .Vug. 4, 1900. 



7. Rliyiicliiiholliriiiiii imp(iri.y>ii>c Linton. On viscera. 4, pp. 79i)-801, pi. LXiv, figs. 9-12. 



8. Lariiil nsliidts (Sciilf.i- ii<ilyiiiorpl)ti.<< \)n'jiiri\\>\). (■"ree in intestine. See ■!, pp. 789-792. .Vug. 4, 19(H). 



