486 BULLETIX (IK THK PNITED STATKS KISH COMMISSION. 



attenuate posteriorly; lips with pajjillH' ami <lentij»erous; IkxIv rather rigid and crossed hy uniform 

 transverse wrinkles; no aUf; postanal region short eonieal, tip slightly mucronate. Two ])ostanal 

 ]>ai)ill;e seen, and at least twenty |>reanal pai>illie counted on one side; spines, slender. Dimensions 

 in niilliiiieters: Length, 17; diameter of head 0.18, 1 mm. liack of head 0..S2, inaxininni 0.()-i. 1 nun. 

 from posterior end 0.47, at anal aperture 0. IS; ilistanceof anal aperture from po.sterior end, 0.1. i; length 

 of (e.sophagu.s, 2.8; up].er lip. length O.IG, lircadlli <I.14. 



CE.STOI)ES. 



3. Titntrhi/nchus IjixulcaluslAnton. Encysteil in stomach wall. -Vug. lii, I'.ion. ><c I, j.. Mu, etc. 



4. Tiirarlii/iirhnti. Encysted on jieritoneum. -I, ]i. 809. 



THK.MATOOKii. 



5. DiiUomuin appendtculalum liiuhAphi. Intestine .Vug. 1(5, 1899; few. See 7, p. 289. 



H. Di.ilomtimiframUporum Hwh^ithi. Intestine. .Vug. 10, 1900; 1. See6, pp. 520-521, nl. .\Liv, fig. 9. 

 This S|)ecimen agrees with ])ublished descriptions of this species very clo.aply. liinly smooth, 

 translucent yellowish white hy transmitted light. During life the worm was yellowish-while with 

 reflected light, suckei-s jiale; genitalia generally, including the uterus, opaipie white; intestine 

 consjiic'iioiis, dark lirown, rami unbranched, hut with irregular outline, exlending to jiosterior end. 

 Some of the ilark-brown contents of the intestine ejected from the mouth while the worm was under 

 ]iressurc. The worm was very a<-tive, and the caudal appendix w;i.s long, slender, ami attenuate. While 

 under pressure the worm naturally lay on its side. In that position the acetaliulum was seen to he 

 nuich larger than the oral sucker. The worm showed a di.sjiosition to doulile up and adhere by both 

 suckers to the i>osterior part of the body; while .so doing considerable jjortions would be drawn inside 

 the cavities of the suckers. When i)laced in the killing fluid it contracli»<l to about 5 nun. and bec-ame 

 cylindriral anil jdumji. 



7. Distommn (/loljijjoriuii Kudoljihi ('.'). Intestine. [I'l. .\x\i, lig. .'J47.] -Vug. oO, 18;)!i; 3. 



These specimens agree very closely with descriptions of this species. About tin- only difference 

 that 1 note is that in these the (esophagus is not longer than the jiharynx. Dimensions of a specimen 

 in glycerine given in millimeters: l-ength, 4. .35; diameter, anterior 0.51, midille 1, posterior 0.22, of 

 or.d smker 0.33, of acetabulum 0.3(i; pharynx globular, diameter 0. Hi; anterior testis, length, 0.."i8, 

 breadth 0.()2; jiosterior testis, length 0..53, breailth 0.58; ovary globular, diami-lcr 0.22; ova, 0.71 and 

 {)..")0 in till' Iwn principal iliameters. But one ovmn was seen in the si>ecimen measured. The ovary 

 lies a liltic 111 the right of the median line. It is immediately jireceded by the cirrus ]iouch. The 

 cirrus ])a.<ses to right of acetabulum and opens at its anterior liorderi>n tln' median line. The acetabulum 

 is situate<I at about the anterior fourth. Testes cli>se together on median line, a little back of middle. 

 Vitellaria (ill posterior part of body back of testes and extend laterally nearly to the acetabulum. 

 These specimens closely resemble those referred to J). >ih»ple.r, but differ in size and in the proportions 

 of the suckers. 



8. Di.ilomum rili'llcsiim lAnUin. Intestine. T, p. 290. [PI. x,\x, fig. 340, o, /,.] Aug. IG, 1899. 



-V few small distomes, of exceedingly variable form while living, sugge.sl />. iimiininif Olsson 

 (Knt. Skand. Ilafslisk, ii, ji. 13, iv, |.. 79). Body smooth, cylindrical; acetabulum i>rominent, much 

 larger than oral sucker, henglh of alcoholic specimen, 0.87 mm.; diameter, 0.3tj nun. A living 

 specimen, 1 mm. in length when contracted, measured 1.72 mm. a few seconds afterwar<ls. In 

 life the transver.se iliameter of the i>ral sucker was 0.14 mm., of the acetaliulum 0.24 nun. An ovum 

 measun'd 0.048 and 0.031 mm. in the two |)rincii)al diameters. In alcoholic specimens the body 

 is elliptii-al-oblong, the neck is very short, conical. The acetabulum is twice the iliameter of the 

 oral sucker, and has a narrow, transverse opening. The lesophagus is short, the jiharynx rather large 

 and globose. The vitellaria extend from jiosterior end to the acetabulum. Genital ajierture in front 

 of acetabulum to the left of the median line. The habit of the body is rather stouter, and its walls 

 ajipeared to be somewhat more resistant than /'. /■i7/7/</.vi(»i; otherwise the agreement wilh that sjKH'ies 

 is very close. 



9. Dislomuiit iireoUilum Uudolplii, Vug. 5, 1899; numerous. .Si>e 7, p. 293, pi. xxxix, ligs. 60-63. 

 10. Distomum ap. In globular eysta on viscera and in intestinal walls. Aug. 30, 1899. 



