TREMATODES FROM FISHES — LINTON 163 



numerous, in balsam mounts, maximum, 0.078 by 0.048 imn. Meas- 

 urements in balsam : Length, 7.4 mm. ; maximimi breadth, 2.2 mm. ; 

 breadth at ventral sucker, 1.9 mm.; length of prepharynx and 

 esophagus each about 0.4 mm. ; oral sucker, length, 0.32 mm., breadth, 

 0.36 mm.; pharynx, length, 0.19 mm., breadth, 0.22 mm.; ventral 

 sucker, length, 0.31 mm., breadth, 0.32 mm. ; ova, 0.069 by 0.045 mm. 

 In a series of cross sections of a specimen 1.4 mm. in breadth, the 

 breadth of the oral sucker is 0.31 mm., vertical diameter, 0.25 mm.; 

 diameter of pharynx, 0.17 mm. in each direction; ventral sucker, 

 breadth, 0.28 mm., vertical diameter, 0.25 mm.; ova, 0.078 by 0.045 

 mm. 



In a series of sagittal sections there are 14 pairs of testes on one 

 side of the median line and 15 on the other. In this series of sec- 

 tions Laurer's canal is on the dorsal side a little to the right of the 

 median line and about on a level with the anterior third of the ovary. 

 The canal was traced to the oviduct which is entered just before the 

 oviduct expanded into the uterus which was there filled with sperm 

 and ova intermingled. 



Host. — Squeteague {Cynoscion regdlis). 



Record of collections.— Yonv (U.S.N.M. No. 8400), collected July 

 27, 1904 (two were white and two faint pink, more deeply colored 

 anteriorly). One, collected July 11, 1905. One, collected July 17, 

 1905, from pyloric caeca of host. One, collected August 28, 1907; 

 length, 6.5 mm.; breadth, 2 mm.; excretory vessel large, sacculate, 

 along median line, toward posterior end. 



GARGORCHIS '" new genus 



Characters of genus: Cuticle spinose; ventral sucker larger than 

 oral; esophagus present; rami of intestine long; main excretory 

 vessel a single median trunk from posterior end to ventral sucker; 

 genital opening in front of ventral sucker; cirrus pouch extending 

 back of ventral sucker and enclosing a seminal vesicle. A second 

 seminal vesicle lies at the posterior end of the cirrus pouch. Testes 

 many (11 in type species), median, behind ovary; ovary behind 

 ventral sucker and in front of testes ; seminal receptacle near ovary ; 

 vitellaria diffuse; uterus mainly in front of ovary. 



GARGORCHIS VARIANS. new species 



Plate 24, Figure 331 ; Plate 25, FiGxmES 332-340 



Body covered with minute spines, dense anteriorly, sparse pos- 

 teriorly, rather plump, usually broadest at level of ventral sucker, 

 with short neck and tapering post acetabular region, but may be 



'Ydpyapa, plenty + opxi-^, testis. 



