4fiO BULLETIN OF THE UNITED STATES FISH COMMISSION. 



ti. liliitiKlioliiilhriiiiii. Kncvstt-d mi viscera. ■!, \>. TIM, )j1. i.mv, li)r. 1, ami |i. 7!is. 7„ ]>]'. 2SO-2S1. 



I'siially ii'ii tlie viscera (ISttO, UMH)), asfidi-iatol with iiiiiiiatiirt' iieiiiatcule.sainl nl ^;^•ven^l s|«'(■i<■^;. 

 7. Uliijiirliitlailliriiiiii xpecioximi Linton. Larv;r imk y.-'teil nn visit-ra. I, pp. .sol-SO.\ pi. i.\iv, (i^. 



13,14, and pi. i.wi, li-^'s. 1-7. 

 K. lihiiiiiliiilitilliiiiiiii hitlliifi r l.intnii. I'jiiysli'il mi viscera. Sec I {I!. Iiiiuiinlli' Knilolplii i, pp. 4S(>— Iss. 



a, PI'- ^-•'>-''^-". !''• '^. '■'J-'*'- •'<.•'- 'I, p. 7!i:{. 5, p. •44S. .\ll>;. G, I!KM). 

 !i. Tili-'ii-liiiiii-hiis hixiilfiihis Liiilon. Kneysleil in simiuu-li wall. I, \i\>. .SlO-Slj. pi. i.wi. li^s. ll-l.'i. 



7, p|i. i'^D-iSl. Ill sut)niuc()sa nf stuniachs alniusl always iiivseiit ilMHi ami l!NK(i. [I'i. 



xxiii, lit;. -•>•, «'"• I'I- ^'<'\'. lisrs. 2(>2-L'(;4.] 



10. Tetriirln/iiiliiix irlimriiix Iteneileii. t »n vi.sceni. i, ]>p. Sll-Sl^, pi. i.xvii, (!•!>■'. 1-8. 7, \t. I'Sl. 



11. Sijiiliolhriinii Jilii-olle Linton. ()ii viscera. I, ])p. 81o-.S20, ]>I. i.xviii, (itpi. 7-12. Noteil in a few 



casein in 1899. 

 11</. See pi. x.v, lij;. 230 and descriplimi <if same, for brief acconnt of a larval ce,stode from a s.|iiid in 

 the stomach of a .si|iieteaj.'iic. This form is related to the •leniis Thiixiiimriiihiiliim. 



TI!i:.M \II1I«K>. 



12. Di.itoiiimn ii/ipcndirulatmii Riidolphi. Inlcslini'. See 7, p. 289, pi. xxxvi, liirs. 2.'i, 20. Found in 



this host July 25 and .Xng. 5, 1899. 

 IS. J>hlo)iiiim riliUiixniii Linton. Intestine. See 7, p. 290, pi. x.xxvii, ti^. 38, 39. 



Found once in July, 1899, four times in .Inly ami Au-iu.st, 1900; rather numerous. The difference 

 in appearance lietween a specimen in sea \val<'r or .salt sohitirm and the suiie specimen in fresh water 

 is very great. See uniler .SV<'yi<(/<i;H'/.s, I'uriitiihlhiix, etc. 



14. DixlDiimm pi/nfiiniii' Linton. Intestine. See 7, p. 290, pi. x.x.xviii, lip^. 52-.">9. 



Small oval distomes; liody covered with minute spines; aeetahulum and oral sucker nearly e<|ual; 

 teste.s median, one liehind the other; ova few and larfje: found twii-e in 1899 ami twice in 1900; appear 

 to lieloii}.' to this spccii'S. 



1.'). /WoHi"»i />o/i/<>n7i(.v Stos icli. [1*1. .x.x.xiii, ligs. 363-3()r).] 



( )n live occa.sions in the siiiiinier of 1900 <listomes were fouml in the pyloric caca of the .stjueleajrue, 

 w liicli agree very closely with this specie.". The synopsis of the species given hy Sto.ssich is lus foll(»ws: 

 I'.oily flattened, elliptical, roiinde<l at the extremities, .\nteriorly the surface is covereil with conical 

 spines .set in transverse series. Theai-etalmlnm is situated at the anterior third, is somewhat smaller than 

 the oral sucker and i>roininenl. The oral sucker is terminal, gloliular, ami its small a|icrluie I'ircular. 

 It is joined by a slender canal with the pharynx, which is vi-ry large and of c|uadraiigular form. 

 There is no (esophagus. Immediately liehind the pharynx the intestine divides into two lirauches 

 which exten<l to the ])0.«terior end of the body; anteriorly, however, each branch is prolonged into a 

 ca'cum w hich extends as far as the anterior l«irder of the i>harynx. Thai wliicii characterizes the 

 species more iiarticularly is the large nnniber of testes. Some of the wiirms contain 24 placed in two 

 series longitnilinally in the niidille of the body. The cirrus pouch is cluh-shaiied, large, ami forms an 

 arch at the right side of the acelabuhmi. In it is the seminal vesii-le, divided into two uneipial parts 

 by a constricliou. Tlie vitelline glands occn]iy all the i>osterior part and sides of the body and exleml 

 laterally as far as the bifuri'ation of the inteslini'. They empty into two Imigiludinal lanals whi<li aiv 

 joined with each other hy a transverse median canal, wliicli is proviiled with a vitelline receptacli' of 

 leclaniTiilar sliapi. The oviduct, situated betwi'en the acetaliulum and ihetestes, contains minuti' ova, 

 elliptical and of a yellowish-brown color. The api'rtiireis beside I hi" anterior niai-gin of the acelabiiliiiii. 

 Length, 3..") mm. to (>..5 mm.; breadth, 1 mm. tn l.."i niiu. P.iill. d. .Soc. .\dv. d. Sii. Xat. Trieste. Viil. 

 XI, I.SS9, tav. XIV. lig. (il [p. 2 of extract]. 



The number of the testes wa.s variable in my sjieciinens. Tin- following numbers weiv notetl. 

 In eaih ca.se the number in the right row is |)laced lirst: 15-|.">; |.i-12; 14-10, two; 14-15, thn-e; 14-13, 

 two; 14-12, two. It is to be underslood that each of the.se testes is either ilouljle or two-lobed, a point 

 that will he settled when the sjiecinie-ns are sectioneil.' The iiroce."*! of egg making was nbserveil in 



' Sections show lliiil Ihc testes are double; in oilier wonts, lti:il Oicy arc |>lar(.il in four instead of two Iiiii];ituf1inal 

 series, two tlor.-jil iiikI two venlral; further, that tile inle.stii]al rami in the ]M>sterior and median portions of tlie iMMly liave 



lllinitToiis short hralK-hes. 



