428 T!T-I,T.KTIN OK TIIK T'NTTED STATES FISH COMMISSION. 



male apparently ecpial. Anal aperture transver>^e with a (•hitinoii.« tcnillied plate im its j><wteri<ir honler. 

 Preanal papilla', as seen f>n left side, about 'M, umiugL-d somewhat in groups of three; on right siilethey 

 appear to be fewer and larger; postanal papilla-, 10 seen on left side and 7 on right, with ti neaily 

 meijian near the tip. Ditnensions in millimeters: Male, length, l(i.5; diameter of head O.ll, 1 mm. 

 from anterior end 0.36, maximum 0.5(!, 1 mm. from posterior end 0.47, at anal apertureO.27; distanee. 

 of anal aperture fnjm posterior end, 0.27: length of (esophagus, \.H. Female, length. :{0: iliameter 

 of head O.IH, 1 turn, from anterior enil 0.-4;i, maxinium O.St!, 1 mm. from posterior end 0.71, at anal 

 apiTture O.L'S; distance of ana! aperture from posterior cud, ILL'S; li'n;.'tli of uwiphagus, '2. 

 \i. IrlilllllOlli'llKI sp. 



From liver, i-olleeted by Dr. Howard .\yers, .-Vngnst 17, IJWVt. Tlie siieeimen is the posterior end 

 of a female, 108 mm. in length and 0.7 mm. in diameter ami ta|H'ring at posterior end. 



3. Immature nemalodex. [PI. xiv, tigs. 183-184.] 



Fragment from intestine. .July 2S, 188lj, evidently introdnceil with food; length. \h nun.; diameter, 

 0.4.")nnn.; still ineloseil in hyaline embryonic rutiele; [losterior eml bluntly rounded: diameter nearly 

 uniform, irrej.'ularly interrupted by indentations. .Inly 31, 18VI9; small fragment from intestine. 



( h>iTOI)KS. 



4. .i:illiiihi>lhriiiiii Idfiiiidliiiii I/inton. S]iiral valve. July 31, I.SVISI; from one host, 4, Not recorded 



before from this host. See umler (hrclHirhiim ohsriirnK, Xo. 3. 



0. J'hiirriobollirluiii litxium I.inton. Spiral valve. 7, p. 273. See umler I'lirchariims uhscurun, Xo. 6. 



Jnly 31, 1899; from one host, 4. 

 (i. I'ldli/liiidirium jiiirviim sp. nov. Spiral valve. 7, jip. 273 and 3(K1, pi. xi.ri, figs. 98, 99. July 31, 

 1899; from one host, 2. See under ('arcliurinu.i iiiilherii. No. ti. 



7. Oloholltriinii rmKicitlh' l.inlciu. Spiral valve. 2, jip. 8.i0-8.'i3, pi. .viir. tigs. O-l.'), ami |il. xiv, tigs. 



1-4. 7, p. 273. 



8. Tetriiiliijiicliits. Encysted in intestinal wall, 'i, p. 808. 



9. T:n,i„ sp. [PI. XXV, tigs. 274-281; pi. xxvi, lig. 282.] 



.Inly 31, 1899; several attached to nmeous membrane of intestine, .\bout a ilozen were attached 

 lirudy, their heads embedded in the intestinal wall w ithin a .space about 10 mm. .s<|uare. Specimens not 

 measured when first taken. The alcoholic six-cimens are not in good condition, Iwing rather fragile. 

 f>imensions of two specimens, in millimeters: L<>ngth, 14 and 24; diameter of head, 0.8lj and 0.70; 

 diameter of neck, O.tiO and 0.50; length of last segment, 0.50 and 0.70; ))readth of la.st segment, 2 and 

 2.40; <liameler of suckers, 0.:{4 anil 0.22. Length of a free segment, 8.5; breadth, 2.5. Some of the ova 

 nearly circidar in outline, with the diameter 0.17; others ovale with maximmu diameter as much as 

 0.22; one 0.17 and 0.21 in the two princii)al diameters. Cirrus long, armed with hooks; length of 

 hooks, 0.014. This specii'S sngge.sts Ticuia ii'ihl,o.i<i Leidy, from a species of himmi iidiabiting the 

 I'acilic coast of Xortli .\merica. 



Alopias vulpes, 'I'hra.ihi'r. 



The viscera of one speciiiii'ii were examined .luly ti. 1,S87, but no entozoa were fonnil. .\nother, 

 examined .\uj.'ust 20, UHlll, had remains of sujall li>h in llie intestine. Xo entozoa found. 



Carcharias littoralis i itilnnlnxjii.i lilliiriilin), Sand Slmrl: 



FOOD. 



Fish imeuhadeu, sea bius.s, scup, aiul liutter-lish noted) ami squid. 



.\C.\ NTHOl'Kl'H .\ I,.\ . 



1. lu'hinorlii/inliiix rairlinri;r. 3, pp. .5;itj-.537, pis. MX, I.X, (igs. 81-84. 



2. EcliiiiorhyniliiiK nrntt Kudolphi. Aug. 12, 1899. from one host 1. Sjiiral valve. Probably introiluced 



with fooil. 7, p. 273. 



^^:.M.\Toll^^s, 



3. Araulliorheilu.1 g\). Stomach, .luly 21, 1S!|||. from oni' host :'.: .\ul'. ■', 1S!I!», from one host 1 ; Aug. 



12, 1899, from one host 1. 

 The.se worms are rather i>hu up, thickest iii the middle and tapering equally to each end. Length, 

 34 to 44 mm.; diameter reatdiing 2 nnn. .Mouth provided with three minute lips. No males seen. 



