Three new Trematocles found principally iu Black Bass. 483 



Each yolk glaiid consists of a number of follicles on eitlier 

 side, having- a sliglit appearance of being arranged in two or three 

 irregulär rows, iioiie of whicli extend in front of tlie acetabuliim. 

 The yolk diict froni each gland passes toward the median line of 

 the body, the two ducts meeting in a yolk-reservoir wliich lies 

 anterior to the ovary. Each of the many follicles contains a number 

 of cells in which the yolk particles are seen in difterent stages of 

 development. The follicle wall is very thin, distinguished only by 

 tlie sraall, flattened nuclei. The youngest cells within a follicle are 

 small, each encloses an ovoid nucleus which nearly fills the cell 

 there being but a slight difference in the diameter of the two. In 

 somewhat larger cells the nucleus remains of about the same size. 

 its increase in size being very much less than that of the cell. 

 Within the smallest cells a number of dark spots are seen, irregulär 

 in Position, but all of about the same size. In larger cells these 

 bodies, the yolk globules, have increased in size, growing larger 

 and larger until they fiually almost completely fill the cell, often 

 hiding the nucleus. The largest of the yolk globules are irregulär 

 in outline and in prepared specimens appear to contain a number of 

 dark granules (Fig. 11). 



The wall of the seminal receptacle is quite thick; seen under 

 a high power the cell boundaries are indistinguisliable. the spherical 

 nuclei being arranged at regulär distances. Each nucleus contains 

 a Single nucleolus and one or more vacuoles. 



Axi/ffia loossii n. «p. 



This fluke (Fig. b) is oblong-ovate, the anterior end not so 

 pointed as the posterior, lengtli 5 mm to 6,7 mm, breadth 0,5 mm. 

 Body uaked. Oral sucker ventral, at anterior end. Acetabulum 

 ventral and median, slightly nearer the anterior than the posterior 

 end. Pharynx fairly large; Oesophagus very short; intestinal caeca 

 reaching to posterior end of body. Excretory vesicle consists of a 

 Short. Wide bladder situated beliind the festes and two narrow, 

 lateral branches. Two festes, one behind the other, in posterior 

 part of the body. Ovary in part or entirely in front of anterior 

 testis. Yolk glands dendritic. lateral, in posterior half of body; 

 Uterus between ovary and acetabulum. Genital pore median, a little 

 in front of acetabulum; copulatory apparatus present. Habitat, 

 mouth and stomach of wide-mouth black bass, Micropferus salmoides, 

 pike, Lucius lucius, and dog-fish, Ämia calva. 



