400 



BULLETIN OF THE BUREAU OF FISHERIES. 



li'. Distomum valde-inflatum Stossich. 



1902. — July is, few; encapsuled on viscera. 

 13. UisiDiiiiim hispiiliim Abilgaard. 



1901. — Aug. 1, 2, 3.5 and 1.5nnn. in length, respectively. Spines were missing from the neck of the 

 larger specimen, but were present in the smaller. 



Abudefduf saxatilis, < 'ow Pilot. 



Chsetodipterus faber, Pori/ee. 



TEEMATODES. 



1. THstomum ineonstans sp. nov. (Figs. 183-187.) 



These are small distomes of very diverse shape, some being nearly circular or squarish in outline, 

 while others are long-oval or fusiform. The short or contracted specimens are yellowish and densely 

 clothed anteriorly with low, flat, rounded spines. The elongated specimens are translucent, bluish 

 white, with spines very scanty and difficult to make out. Suckers about equal, sometimes one, some- 

 times the other being the larger. The pharynx, not of constant shape, is a little longer than broad, 

 and in specimens which are not too strongly contracted is separated from the anterior sucker by a 

 distance rather less than the length of the pharynx. There is a distinct oesophagus, and the intestinal 

 rami are simple and extend nearly to the posterior end of the body. Testes subglobular, lateral, about 

 the middle of the length of the body; in the specimens studied 6 were counted on the left side and 4 on 

 the right. The cirrus passes to the left of the ventral sucker, opening in front and a little to the left 

 of it. Its position, however, varies with the state of contraction. In some cases the cirrus pouch is 

 posterior to the ventral sucker; in others it is to the left, and in yet others in front of the ventral 

 sucker. The prostate gland and seminal vesicle are both included in the cirrus pouch. The ovary 

 is median, situated between the two groups of testes. It is lobed, and is about the same size as a single 

 testis. The vitellaria are very abundant, filling the posterior and lateral regions of the body, and 

 extend as far forward as the origin of the intestinal rami, or even to the pharynx, covering and 

 obscuring the other organs. Foldsof the uterus lie in the median line both in front of and behind the 

 testes, continuing on the left side of the ventral sucker, lateral to the cirrus, to the genital aperture. 



Dimensions, in millimeters, life: Lengths of two short-oval specimens 0.7 and 1.15; breadths of 

 same 0.45 and 0.65; diameter of oral sucker 0.18, of ventral sucker 0.2; ova 0.06 by 0.04. 



In another lot; Longest specimen 2.1, breadth 0.77; average length about 1.25, and breadth 0.8. 

 Diameters of oral suckers in three specimens 0.17, 0.18, and 0.16, respectively: diameters of the 

 corresponding ventral suckers 0.18, 0.16, and (1.17, respectively. 



1901. — July 31, 9, small, short-oval. Aug. 6, numerous, of great variety of shapes. 



