466 BULLETIX OF THE UNITED STATES FISH COSIillSSION. 



4. Tiirarhi/nrhuf! il(iiif/alui< Wagener. Liver. 4, pp. 812-813, pi. Lxvii, tigs. 9-12. 7, p. 282. July 

 19, 1899; 5 sfolice.«. July 10, 1900; 6 st-olices. July 30, 1899; several. July 29, 1900; several. 

 One of tliese larv;e in it.s bhustucyst wa.« dii^S'ecteil nut ol tlie liver l>y Mr. \V. \V. Francis, July 19, 

 1899. It.« (li'iiensions, in niillinieters, follow: Lenfith of anterior aotivi'ly motile part of lilastoeyst 18, 

 (lianieter 4; lenglli of posterior ])art of blastocyst 400, ilianieter 2. The.se iliniensions were chan-reil 

 somewhat after the s]>ecinien hail l)een lyin;; in water for three or four hours, .\fter killiiii;, the length 

 of the anterior portion was 24 mm. and of the i)0.sterior 440 mm., the diameter remaining the same as 

 in the living specimen. The posterior two-thirds was eml>edded in the liver; the anterior third was 

 on the surface, l)ut under tlie serous coat. In another specimen the anterior part was 40 mm. in 

 length. The [Mjsterior portion was not all dissected out. If the projiortions are the same as in the 

 first, it should bo 800 mm. in length. The five specimens represent an aggregate length of probably 

 3 meters, 2 of which are in the substance of the liver. The explanation of the great length which 

 these ce.sto<les attain in the liver of the sun-fish is doubtless to l)e found in the fact thafthe life of the 

 host is very long, and therefore the time which the worm is doomed to remain in the liver after it has 

 once gained a lodgment there nnist likewise l)e very long. Of course its surroundings must be congenial 

 and conducive to longevity, el.se its tissues would, sooner or later, degenerate. Although this cestode 

 appears to be invariably present in the liver of the sun-fish, it may l)e <iiiestioned wliether the sun-fish 

 i.s, in a strict sense, the proper intermediate host of this worm. It would indeisl be a largi^ animal, 

 and one with phenomenal digestive jiowers, which would habitually use the sun-fish for food. 

 "). lllii/iiclKiliiilliriiiiii sp. From cysts on intestine under the serous coat. July 7, 1900. [PI. xxii, figs. 

 2 1.'> -iTiO. ] 

 Length of cyst, 27 mm. ; breadth. 111 iiiiii. A globular portion of the cyst was of den.se connective 

 tissue o nuM. thick; the spait- within, about 2 mm. in diameter, was filleil with yellowish coagulated 

 fluid. The blastocyst, which had evidently at one time occupied this space but now lay in a thinner 

 walled part of the cyst, was 42 nun. in length and 5 mm. in greatest diameter. It containeil a larval 

 lihi/nchoholhruuii which, when everted, measured 20 mm. in length. 



TKESI.VTODES. 



6. TVis/omUHi ;h(i/,i r.lancharil. [Tri-ilomnin nifliilphiaiiHin DivAiv^.J Skin, gills. O, p. .'ilO. 7, p. 281. 



A sun-lish captured July 30, 1899, was reported by Dr. Dahlgren to have had 138 trematodes 

 on the skin. July 19, 1899; 1. This was translucent, bluish-white, with a shade of ]iiiik. especially 

 toward the posterior end. Lateral areas, dark-brown. July 10, 1900; 2. 



7. l>istoiniiiii /;('«■;■(«•( )^//f Dies! ng. Intestine. 0, pp. 522-523, pi. XLV, figs. 9, Hi. and pi. xi.vi, figs. 1-5. 



7, II. 282. July 29, 1900; 12. 



8. Dinlomumcdiiloiiitm Rudolphi. Intestini'. «, pp. 528-530, pi. xLViii, tigs. 3-7. July 19, 18!l«; 3. 



9. DhUimina iiiijrojiiirniii Kudolplii. Intestine. O, ]ip. 530-531, pi. xi.vii!, figs. 8-11, and pi. XLix, 



figs. 1, 2. 7, I). 282. July 30, 189t»; 9. July 10, liHM); 2. July 29, 1900; 3. 



10. Dlslomiimfolmlniii Linton. Intestine. <i, i>p. 532-534, pl. XLix, figs. 3-5; pi. i., figs. 1-3; jil. li, 



figs, i -4. 7, p. 282. July 19, 1899; 1. July 10, 1900; 4. July 2t>, 1900; 1. 



11. JJi.slomum fnifiilr Linton. Inte.'itine. «, pp. 282-295, pl. xxxiv. figs. 08-70. July 10. PHMI; 



numerous. Length of living specimens, 4.2 nun. 

 Many c()pepod panisites were seen on the sun-fish; numerous fiat, scale-like forms on the skin; 

 large paired forms on the gills and long lerneans with heads burie<l in the llesli, the body with eggs 

 hanging like a dark-brown ta.ssel from the skin. One parasitic co]ie))oil was foiiinl under Ihe skin, 

 which at that point was over an inch thick. 



Myxocephalus asneus ((.'uUus ;nieits, AnnUhucuUwi uitciui), LilUc SciUjjin, Grubby. 



.\nnelids, co|iepods, shrimps, and yoimg lish fouml in the alimentary canals of young specimens. 

 Many young Hounders and shrimps taken from alimcMlary tracts of young sculpin from Katama Bay, 

 August 28, 1900. 



VCA.NTHOlKI'llAL.V. 



1. Echinorlii/)icliu.i <icu-i Kudolplii. :{, p. 525. 



