TREMATODES FROM FISHES — ^LINTON 57 



length, 7 mm, in formalin. Densely spinous on neck, spines con- 

 tinue to level of posterior testis. This specimen, mounted in balsam, 

 shows only a lateral view of oral spines. There are about 42 spines 

 in the two oral circles. Length of oral spines about 0.06 mm., of neck 

 spines about 0.036 mm.; seminal vesicle extends more than halfway 

 from ventral sucker to ovary; vitellaria extend from posterior end 

 to level of anterior border of ventral sucker; a few follicles between 

 testes; prepharynx as long as pharynx; esophagus short, or none; 

 ova, 0.084 by 0.045 mm. 



Eecorded from striped bass : Proc. U. S. Nat. Mus., vol. 20, pp. 535, 

 536, 1898; Bull. U. S. Fish Comm. for 1899, p. 455, 1901. One 

 (U.S.N.M. No. 8209), collected July 13, 1925, from striped bass. This 

 distome was somewhat macerated, oral and cuticular spines missing. 

 The seminal vesicle extends 1 mm. back of ventral sucker, to a point 

 0.7 mm. in front of ovary. The vitellaria extend to within 0.2 mm. 

 of the ventral sucker, its follicles filling the intervals between the 

 testes and between the ovary and first testis. The ovary is separated 

 from the first testis by a space equal to its diameter, and the testes 

 are separated from each other by a somewhat longer interval. Shell 

 gland in front of ovary; no seminal receptacle could be distin- 

 guished, but the early folds of the uterus appeared to contain sperm. 

 Dimensions in balsam : Length, 4.62 mm. ; breadth, 0.56 mm. (maxi- 

 mum, at anterior border of ventral sucker) ; breadth behind ven- 

 tral sucker, 0.45 mm.; oral sucker, length, 0.14 mm., breadth, 0.21 

 mm.; pharynx, length, 0.14 mm., breadth, 0.21 mm.; ventral sucker, 

 length, 0.3 mm., breadth, 0.33 mm. ; ova, 0.084 by 0.04 mm., 0.09 by 

 0.045 mm.; length of prepharynx, 0.35 mm.; esophagus lacking or 

 very short. A reexamination of old material from this host was 

 made and the number of oral spines found to be 42, as stated in the 

 original description of the species. 



Recorded from toadfish: Bull. U. S. Fish Comm. for 1899, pp. 

 468, 469, 1901. 



STEPHANOSTOMUM VALDE-INFLATUM (Stossich) 



Distomum valde-inflatnni Stossich, Linton, Proc. U. S. Nat. Mus., vol. 20, pp. 

 527, 528, pi. 47, figs. 1, 2, 1898; Bull. U. S. Fish Comm. for 1899, pp. 444, 

 464, 1901. 



Since these immature, encysted distomes have not yet been allied 

 with any adult stage it seems best to record them under this specific 

 designation. 



Hosts. — Filefish {C&)'at acanthus schoepf), silversides {Menidia 

 notata), toadfish {Ofsanus tau)^ sunfish {Mola inola). 



Record of collections. — Recorded from filefish : Proc. U. S, Nat. 

 Mus., vol. 20, pp. 527, 528, 1898; Bull. U. S. Fish Comm. for 1899; 



