468 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



Several other lota, most of them collected by Mr. Edwards, consist of immati're nematode? 

 encapsuled on viscera. They are younjj ascarids, and while their relative proportions differ consider- 

 ably from the larger specimens they are, without much doubt, younger form.-? of the same species. 

 Dimensions of a typical si)ecimen in millimeters: Length, 15; diameter of head 0.08, middle 0.;fl, at 

 anal aperture 0.12; distance of anal aperture from posterior tip, 0.21. [Figs. 157-159.] See under 

 Glyptocephalus cyiioglosms. 



TREM.\TODES. 



2. Dislomum simplex (?) Rudoljdii. Intestine. 6, pp. 525-526, pi. xLvii, figs. 3-7. 



Opsanus tau (Batrachus tau) , Toad-figh. 



FOOD. 



Among my food notes of this species I fln<l the following noted: Lillorina lllloria, Ibjanaxsti ohmlfin, 

 Tritlia trivilala, rromdptiitj- chierea, usually with hermit crabs; Cnpiduld foniitiit'i, I'eilen irradianx, 

 ('(iiicer irroruliis, Pahcmoiietes ralgnrk, Enjuujvrnx loixjirorpux; bones and other fragments of fish; a 

 partly digested toa<l-fish. I have seen a toad-fish in the aquarium in the act of swallowing another of 

 its own species but little smaller than it.«elf. In the alimentary canal of a small specimen two shells 

 of i'tricultis canalictilalmi (Bulla) were found. 



ACASTHO< KCHAl.A. 



1. Echinorhjnclms Mils i\ih\iil\>\ii. Intestine. Oct. 22, 1.SS7. Collected liy Vinal N. Eilwards. Length, 



22 mm. Se<! 3, p. .">25; 1, p. 4!t2. 



2. Echinorhifnrhux lujUi.s Ktiddlphi. 



In the U. S. Xat. Mus. collection; a single specimen, collected at \Vf>ods Hole. Length, 4 nun. 



3. 7i>7ii/K<?7(//H(7i».s /iw(/or//i/.v Zeder (?). [I'l.' ii, fig. 11.] Intestine. 



One specimen, a male, collected August 7, LSiW. This apjH-ars to be near E. Jnsifnriiiix Va'iXvw 

 The body is fu.siform, gradually attenuate in front to the base of the proboscis, aliruptly constricted at 

 test<-s, whence it is cylindrical to the posterior end. Proboscis clavate; eight vertical rows of hooks 

 visible on a side and about fifteen hooks in a vertical row. The hooks are sharp, iecurve<l, and rather 

 .slender. Testes two, elongated, lying end to end, and are followed by an elongated, tubular, senunal 

 receptacle and a subglolmlar bnlbus eja<'ulatorins ('.*), whi<-h communicates with the copulatory bursa 

 by a slender duct. 



Dimensions of a mounted spei-imen, from which this description was written, in millimeters: 

 Length, 5; length of jirobnscis O.tifi, of ]iro'oos(is sheath 0.73, of lemni.«ci 1 ; diameter of proboscis, ape.\ 

 0.15, middle O.l.'i, ba.-^e 0.10; diameter of body anterior 0. 15, middle (1. 4S. posterior 0.13. 



NE.MATOI)I>. 



4. AHcnriii Uiiheiiii \Anion. Stomach and intestine. 7, pp. 282, 302-303, pi. xi.iii, tigs. 101I-I15. 



Found five times in the summer of 1800 and four times in the summer of 1000. It was fouipl in 

 every lot of toad-fish exandneil, although not in every individual. The eggs of this species are large 

 and rather transparent. [I'l. vi, tigs. 5(5 «-/.] The nmnber of chromosomes appears to be .-iniall. A 

 sketch of a young specimen with embryonic i uticle is shown in pi. vi, tig. 55. 



5. UliiinchiilmthriiDii tumUUUniii Linton. Scolices in intestuic. .Si- !i. pp. 820-832, pi. .\i, lig.s. 3-11. 

 July 2(), 1900; 1. Aug. 10, 1000; numerous. 

 These scolices are characterized by having a cons|iicuons n-ii pigment blotch in the neck. Others 

 with essentially the Siime kind of probosiides, but with no red pigment, were fouml August 5, 1809, 

 The hooks and proboscides resemble It. Inmiduluin. [I'l. .\xi, fig. 241.] 



TKKM.VIXlDlis. 



0. DUtomnmtcuuelAnion. Intestine. See 6, pp. 535-53(), pi. i.ii, 2-,8. .\ng. 15, 1809; July 2(3, 1900; 

 Aug. 4 and 10, 1900; few. Color in life translucent bluish-white, vitellaria yellowish-green. 



