484 Bl'LLETI.V OF THK UNITED STATES I-TSH COMMISSION. 



NEMATODES. 



2. fmiiKituiv iieiiiiilO'li'x {Axriirlx). [PI. .\iii, fig!-. 1.52, I.i3.] 



Fi)uuii on each of tlie dates given aliove. Thet»e ajijiear to lie iilciilical witli small nematodes 

 found in a number of different .siieeies of fish. Some of these were compared with s|ieeimens from 

 I'rophiirix chuKs and hij)liol<ililii.i flininaiiDiitiir/ix. All of these were living at the time. They agreed in 

 all e.s-ieiitial characters. At the junction «{ the n-soiihagu.« and inte.stine there is a diverticulum fmm 

 each, one frnin the intestine whii'h extends forward parallel with the u-sophagus and one from the 

 o'.sopliagus which extends backward parallel with the intestine. 



Dimensions in millimeters of a small specimen collected .\ugust 2, 19(H1: J,engtli, 10..5; diaiiicler 

 of head, 0.07; diameter at nerve ring, 0.17; diameter at anal aperture, 0.11; distance of nerve ring from 

 anterior end, 0.3(!; length of o'sophagu.s, lAb; distance of anal aperture from |>ostcrior end, 0. IS). 



Figs. 152 and l.W are sketches of a specimen from a lot of immature nematodes collected by the 

 U. S. Fish Connni.ssion in 188."J, station 115.S. Length, 22 mm., of nearly uniform diameter throughout 

 (0.4 mni.); distance of anal aperture from jiosterior end, 0.1.5; diameter at anal ai)erture, 0.12. 



ci.>;Tni)i.x. 



3. Dihothriuiii jHiiKitiliiiit Kuiloljilii. 



A .small, slender, immature specimen from the inte.'^tine, collect(rd .Vugust IG, liSllil, probably 

 iMjlongs to this sjiecics. See ii, i)p. 731-7:5(i, pi. ii, figs. 1-4. 



4. Ijirnil nslodcs {,Si-nli:r jiitlijtnor/ihiix Ilujanlin). Krei' in intestine. Found both in IS!l!t and IIHIO. 



See 4, pp. 789-792, etc. 



5. lxliiiiicliolii)thriiiiii. Encysted on viscera. Found in 1899. 4, p. 798. 



6. Telrarlii/nclius bi.iulcatus Lint<jn. Subnincosa of stomach. Found in 1899 and 1900. See .|, p. 



810, etc. 



Bothus maculatus (Ijiphopsetlii macuUiin), fi>(tnd-ihil>, Whiili/w-jxiiic. 



XE.MATODtX 



1. JiniitalMre luiiiatiiilix (Axmri'<) . 



Common in this as in the other (louiiders, encap.suled on viscera. A small lot in the I '. S. National 

 Museum collection from the (irand Ban k.s, (schooner ./. .1. Chiii>man) in poor condition, a.s if macerated, 

 from turbot, here recorded. Lengths, .■)7 nun. to .55 mm.; greatest liiameter, 2 mm. .\nteriorly 

 attennat •. [I'l. xiii, (igs. 1.54-1.5t).] 



C RSTOOKS. 



2. Ililiiilltriiim jinnrtuluin Hudolphi. Ijilcslinc. I, pp. 731-7oli, pi. ii, (igs. 1-4. 3, |i. 4.')0. 

 ;!. Jihi/iicliiiltiidiriiim imparix/iiin Linton. I, pp. 799-SOL pi. i.xiv. ligs. 9-12. 



liimanda ferrug-inea, liu.ihi Flnt-jisli. 



The alimentary tract in some ca.ses contained enormous nund)ers of cru.staceans; of the.se, 

 ampliipoils were most numerous, but shrim|>s, schizopods. small crabs, f Vi/m//'/, and Sijuilln aL-^o fouml; 

 annelids, different spei-ics: liivalve and univalve niolhisks; small lisb. 



Al ANinol'lvIMIALA. 



1. i:<liiii>iihiiii(liii.i iirii.H JiudiA])U\. Intestine. 3, p. .52.5, etc. 



In two lots of the T. S. National Museum i-ollection. Off Block li-laml. 18S(». August .5, 1899. 

 August Hi, I'.KM); :;0. a few i|uite small. .Vugust 2, 1900; 14. 



NKM. MOORS. 



2. ImmnliiTi' nimnliiilix (.(.fciiris). 



.\ugust 5 and Hi. 1.S99. These are similar to immature nematodes found in a great variety of 

 fishe.s. Jlost of those which I have seen appear to be young a.scarids. 



