4 72 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



about 14 rows of hook.s visibk- I'ountod transveivelv, and about Iti countod from bas^e to apex. The 

 .■iheatli is cylindrical and the lenini«-i appear to be a Httle s-horler tlian the sheath. Dimensions of 

 alcolioHc .sjiecimen, in millimeters: lA'n<;th, 10; length of proboscis, U.72; iliameter of )>roboscis, ba.se 

 0.34, middle 0.33, apex 0.28; length of longest hooks, O.OC; lengtli of sheath, l.IG; diameter of sheath, 

 0.32; diameter of body, anterior 0.58, near posterior 0.43. 



XKM.XTonivS. 



2. Iiiiiiiaturc iienintodcx. [PI. .\i, tigs. 123, 124.] Encapsnled and free. 



Found on each occasion on wliich this fish \va.s examined. On July .30, IVIOO, rather numerous. 

 The worms were .still living when they were examined and aj>peared to !«• identical with immature 

 nemat(jdes from I'ruphyris ihiixs a,\»\ Piiralirhl)iii« oliloiiijiku, with whiih they were compared. Figs. 123 

 and 124 are from sketches of a six-cinien collecte<l by the Fish Commission in 1881. Length, I."> nini. 



CBSTODES. 



3. Liirnil rfKlodr.i (Srolej- j/obimorpliux DiijanWn). Free in intestine. See -I, ji. 7Si). etc. 



. Noticed in material collected .\ugust 10, 18(10; rather numerous in material collected July .30, 

 liKMI. The latter were still active, the viscera from which they were obtained having been kept on 

 ice for two days. They appear to be similar to forms fouinl in the si|ueteague and other tish, although 

 doubtless many species are rei)resented by this well-nanieil Sculi.r /jdhiiiKn/ihiix. Keil piL'iiicnt patches 

 were noted in the necks of these larva'. 



4. Ticnia-Vilce friKjmentx. Intestine. 7, p. 282. 



.5. Cesloil,;- new. Intestine. [PI. xx, figs. 233, 234, and i>l. x\i, figs. 236-238.] 



Two scolices, which ap|)ear to lieloiig to an undescribed gcmi.s, were obtained from the intestine 

 of a tile-fish July 2tl, 1899. The S|K^cimens had been in formalin for two days before I had an 

 opportunity of seeing them. The heads and posterior parts were white, the nei-k and median part.s 

 pinkish. They were about mm. and 8 mm. long, re^-pectively. The scolex resembles Echriiiihothriiim 

 in having four nnarmed bothria and a terminal muscular disk which is provided witli an anterior 

 central auxiliary sucker. Each bothrium, consider('d alone, suggests the genus I'hi/lloliiilliriuiii, being 

 without transverse cost;e, having the bordere thrown into cnim]>led folds and being provided with 

 an auxiliary acetalmhim on its anterior border. The bothria seem ta Ik- jilaced on the head, as in 

 Critxsi>holhriiim, while they project in the preserved specimens ."o as to stand nearly perpendicular to 

 the flat surface of the neck, as in (hliijilrohdlliriiiiii. The muscular ilisk in front of the bothria sugge.sts 

 the geiieni Tiikiciphiilnin and Dixcori'jili'lhtiii, while the terminal auxiliary acetabnlum, which can be 

 seen in the mounted specimen and has its presence fully demonsti-ated in Icmgitudinal .«c<-tions, linds 

 its counterjiart in the genus ErheneihoOirbnn. Tlie auxiliary acetabula on the Ijothria are concealed 

 by the anterior muscular disk and are didicult to see in the.se s|)ecimeiis. Transvei'se sections of the 

 body show no rudiment of reproductive organs, no differentiation of a central I'ore, only a few 

 comparatively coaive longitudinal muscles in the ])arenchynia. 



The ves.-^els of the water-va.scular system are |>romineiit and tortuous, and may be seen along the 

 lateral margins of the body, the margins of the bothria. and extending into the inusi-ular disk. Other 

 dimensions in millimetei-s are: Hreadth of disk lietween bothria l.Ki, thickne.-;s0.!t3; thicknew of head 

 through bothria, 1.31; transverse diameter of head. 1.74; diameter of anterior acetabulum, O.l.'i; 

 breadth of body back of heail 1.09, thicknc-s O.ll. 



G. TiliiirliijiirhiiK hisiilcdliis Linton. 8colex. July 30, 1900. 



This specimen agrees with 7'. lii-tiilraliit:, except that the collar is wider than tin- head, ami rugo.^e. 



TRKM.ATODES. 



7. lUxluminii ocrealum Molin. Intestine. 



Twelve specimens obtained .Vugust 10, 1899, agri'c with the species which I have been recording 

 un<ler this name. Length of s|)ecimens mounteil in balsam vary from 1 mm. to 2..t nun. See 6, i>p. 

 r)14-.")l."), i>l. xi.ii, lig 13. 7, p. 288, pi. XXXV, (igs. U>-24. 



8. Dinlomuiii fferundum i.mUm. Intestine. 7. |ip. 282, 289-290, pi. x.wvi, !igs. 27-.'t">, and jil. xx.vvii, 



figs. 3(>, 37. 

 .Inly 30, 1900; 1, which is probably to be rt>ferred to this species. Tiie material from the inte.stine 

 was washed out in fri'sli water. Some distomes swell up when placed in fresh water, the ai-etabuluiu 



