PARASITES OF FISHES OF THE WOODS HOLE REGION. 461 



this species and was essentially like tlie process observed in Epihddla humpuxii (7, p. 287). At 

 intervals of about twenty seconds a mass of yolk could lie seen to leave the yolk reservoir and proceed 

 the short distance required to reach the definite point in the duct where an active nuiscular organ 

 molded a shell around the mass. It was then forced forward into the uterus. The lol>ed ovary, shell 

 gland, yolk reservoir, and beginnings of the uterus are so closely crowded together that further details 

 of the process could not be made out. Length of these sjiecimens (ali-oholic) 4 to 7.5 mm. 



COPEPODS. 



16. Mention may be made al.so, among entozoan parasites of the squeteague, of a copepod fimnd 

 beneath the skin of the opercular bone, by >Ir. E. E. Tyzzer. 7, p. 285, pi. xxxiii, figs. i-5. 



Sciseuops ocellatus, Red l)rn;.i. 



NE.MATODES. 



1. .4scamsp. [PI. viii, figs. 79, 80, and pi. ix, figs. 81-83.] 



Collected by S. E. Meek, Fulton Market, New York, from fish taken off Sandy Hook, September 

 8, 1886. Three males and two females and four small, slender, immature. Habit of body in larger 

 specimens, stout. Dimensions of female in millimeters: Length, .16; diameter of head 0.41, 1 mm. back 

 of heiid 0.06, maximum 1.8, 1 mm. from posterior tip 0.9, at anal aperture 0.56; distance of anal 

 aperture from posterior en<l, 0.65; length of (esophagus, 6.5. These dimensions include the loose 

 cuticular membrane. < Esophagus in females somewhat linear-fusiform, with its greatest diameter about 

 its iK)Sterior third; in tiie males somewhat tlask-shape, and 2.25 mm. in length in aspecimen measuring 

 20 mm. in length. Largest male, 27 mm. in length. Four postanal and twenty-nine preanal papillw 

 were counted on the left side, and two postanal and twenty-nine preanal on the right side. Length of 

 spicules about 2 mm. 



2. .l.scarfs sp. Immature. [PI. xii, figs. 134-137.] 



Probably young of Xo. I, encapsuled in peritoneum. Tail blunt, rounded, with mucronute tip; 

 oesophagus long and linear; intestine dark-brown. Dimensions in millimeters: Length, 16; greatest 

 diameter, 0.43; length of (esophagus, 2.65. 



Menticirrus saxatilis, Kiti.(/-Jish. 



Twenty-seven small specimens were examined on live occiisions in .luly and August, 18111), and 

 one large specimen August 3, 1900. July 28, 1899; intestines filled with small amphijiocls, isopods, and 

 shrimps. Augusts, 1899; small crustaceans. August 7, 1899; shrimps, amphipods, isopods, annelids. 

 August 8, 1899; large shrimp with eggs on swinnnerets, young ti.sh, and bryozoa. August 28, 1899; 

 annelids, .\ugiist 3, 1900; jiieces of fish, l)ryozoa. 



XEM.VTODES. 



1. Immature neiiuitodfs (Ascarix). [PI. xiv, figs. 168-171.] 



Collected by Vinal N. Edwards, November, 1886. These were very numerous on the stomach 

 and liver; slender, white, smooth, head truncate, tail eudhig with a mucronate spine. Another l(jt in 

 I". S. National Mu.seum collection, specimens somewhat larger, rudimentary lips of .l.vccrr/.v discernilile 

 and tail not nuicli jiroloiiged beyond anal ajierture; nmcroiiate tip to tail not spine-like. These are 

 probably an older stage of the same. The spine-like character of the nuicnjuate tip apparently lost 

 by the shedding of the embryonic investment. Dimensions in millimeters: Length, 21; diameter 

 of head 0.25, middle 0.4, at anal aperture 0.09; distance (jf anal ajierture from jiosterior end, 0.13. 

 Corresponding dinu^nsions of more mature specimens: 25; 0.24, 0.42, 0.16; 0.16. 



CESTODES. 



2. Larval ci'Klodcs (Scolcx poli/moi-jtli us Diijardin). In intestine. See 4, j). 289, etc. Found July and 



Aug., 1899, Aug., 1900. Those obtained on the latter date were very small. 



