PARASITES OF FISHES OF THE WOODS HOLE liEGION. 485 



3. Dihiilhnini, jiiiiKiuliiiii VMi\ii\\<]i\. liilrsliiu'. 2, pp. 7:!l-7:!(i, [il. ii, liu's. I 4. ."», p. 4:'.0. ■?, p. 284. 



July 21, 1S99; 2, k'ligtli S mm. and ISO mm. Aug 2, lllOO; I. 

 -I. tjiniil fistndix (Scoli'.r poli/mor/iliiix Dniard'm) . Free in intestine. 1. p|i- 7.S;i-792, pi. i,\r, ligs. 4-15. 



Aug. 2, 1900. 



5. Jtlii/iicliiiliDlJiriuia iiii/iiirixj)iiii Linluu. .Inly 21, ISO'.I. Km-yslcil mi \ i.-^ccra. Sre 5, p. 799, etc. 



Other IlhyiK'li<il)(ithrunn cysts not iilentified July 21 ami Anijnst il. ISil't. 



TKE.MATOIIKS. 



6. Dislomum vitellosutn Unton. Intestine. .Inly 21, 1899; almnt 4."). See 7, p. 290. 



7. f)idi)iim}it simplex llmlolphi. Intestine. Aug. 10, 1899; 2.'), length 2 nnn. lo 4 nnii.; (a a, 0.009 mm. 



anil 0.05.5 mm. in tlie two principal diameters. 

 S. Dislnmum sp. Intestine. [PI. xx.xn, fig. 359, and \t\. .vxxiii, figs, ;',i;0-:;ii2.] .\ng. hi, 1899; 5. 

 Aug. 2, 1900; 1. 

 These are small fusiform distomes with the following diagnostic characters: Body smooth, 

 fnsil'orm, thickest about the middle, tapering nearly equally to each end. Anterior sucker subterminal, 

 ciix'ular, aperture somewhat triangular in jireaerved specimens. Acetabulum a little in front of 

 middle, larger than oral sucker, aperture nearly circular. Pharynx snbglo))ular, close to oral sucker, 

 (esophagus distinct. Intestinal rand simple, extending to the ovary. Yitellaria distrilmted in the 

 median regions of the liody from testes to pharynx. Testes two, rather large, placed a little diagonally 

 on the meilian line near j)osteiior end of liody. Ovary smaller than testes, snljglobular or slightly 

 lobe<l, situated in front of anterior testis and to the right. Ova few, large, in front of ovary. Cirrus 

 pouch to right of acetabninm. ( ic'nital aperture about halfway between acetabulum and oral sucker, 

 to right of median line, at about nudway Ijetween pharynx and acetabidum. Dimensions of living 

 specimen, in millimeters: Length, 2.57; diameter, anterior 0.25, middle 0.9.3, posterior 0.21; diameter 

 of oral sucker 0.21, of acetabulum 0.36; anterior testis, length 0.43, breadth 0.3fi; posterior testis, 

 length 0.43, breadth 0.37; ova, 0.065 and 0.041 in the two principal diameters. Length of another 

 specimen, 1.57. Dimensions measured from transverse sections: Diameter of oral sucker 0.19, of 

 acetabulum 0.33, of ovary 0.17, of testes, each 0.3. The ratio of oral sucker to a<-etal)ulum is somewhat 

 different from the foregoing, their diameters in one of the specimens being 0.14 nnu. and 0.1 7 mm. This 

 for aspecimen in glycerine. This species has some resemblance to D. runiniiinc ( )lsson. Its resemblance 

 to the fusiform distome which I have referred to H. Jiolliriio/ilKinni Olsson is only superficial. 



Pseudopleuronectes americanus, Fhil-Jixji, Winlrr Fhniiiihi: 



A specimen examined August 16, 1899, liad in the alimentary canal large numbers of shrimps and 

 other small crustaceans and one small flsh. Four small specimens from Katama Bay, August 30, had, 

 in their alimentary tracts, both mnvalve and Ijivalve shells, small crustaceans, and annelids. An equal 

 numl)er, also small, from same locality, July 27, 1900, contained nereis and fragments of red seaweed 

 with sand. 



.\C.\ NTI lOCEPFIA LA . 



1. 7'>/tiHO)7ij/m7at.s- (n-nx Rudolphi. Intestine. I, ]ip. 492-493, |il. v, tigs. 7-13. it, pp. 525-528, ]il. 



i.iii, figs. 1-11, and \>\. i.x, figs. 89, 90. 7, p. 284. 

 In eleven lots in U. S. National Museum collection, seven nf them collected by V. N. Kdwards in 

 October, November, and December, 1887, 1888, the others taken off NewiJort at Fish Connnission 

 dredging stations Nos. 789, 796, 861 . In most of tliese lots the spe<-imens are numerous, 350 having been 

 counteil in one of them. Found in this host Jul)' 21 and August .30, 1899, and July 27, 1900. 



NE.MATOOES. 



2. JiHinalnre itfmatodix {.Ucarh). 



These resemble the forms mentioned under /'. ithlimi/ii.i, No. 2, .Inly 27, 1900. 

 2'(. Asan-isf-p. [PI. ix, figs. 88, 89.] 



One specimen, a male, collected July 23, 1889. Moderately attenuate anteriorly and very little 



