854 DR. WILLIAM NICOLL ON 



The new species differs fi'om all other Dicrocoeliidfe in the dis- 

 tribution of the yolk-glands and in the shape of the pharynx. 

 Another important feature is the distance separating the ovary 

 from the shell-gland complex. From the genus Dicrocodium it is 

 further distinguished by the position of the testes and the ovary 

 and by the extent of the uterus. With Platynosoimim it is moi-e 

 closely allied, yet the differences between it and this genus are 

 greater than those separating Dicrocodiam from Platynosomum or 

 Eurytrema. It is rather curious that this new species does not 

 show any particularly close relationship to '■' Dicroccelhtm" injidum 

 de Faria from the snake, Eunectes marina. The latter is closely 

 allied to the avian genus Platynosomum and should be included 

 in it, unless de Faria's doubtful observation in regard to the 

 excretory vesicle proves to be coi'rect. 



Styphlodora naj^, sp. n. (Text-fig. 122, A.) 



Fovir somewhat macerated specimens of this species were found 

 in the ureters of the Cobra. The species is a typical member of 

 the genus Styphlodora and presents a very great resemblance to 

 S. serrata Looss and to S. horrida Leidy. The features separating 

 it from these two species are so slight that I have some hesitation 

 in regarding it as a distinct species. They are, however, quite as 

 distinctive as those separating the above two species from each 

 other. The difficulty is rather increased by the fact that the 

 present specimens, although mature, are possibly not fully grown. 



The length is 2'0-2-4 mm., the greatest breadth •42--55 mm., 

 which occurs a little behind the ventral sucker. The breadth of 

 the whole postacetabular region is fairly uniform, and there is 

 only a very slight attenuation in the neck. There is a considerable 

 amount of dorso-ventral flattening. In each of the specimens 

 cuticular spines were entirely absent, but it is practically certain 

 that they have fallen off, and it would be unreasonable to suppose 

 that this is an unarmed form. On that account I have had spines 

 depicted in the drawing. 



The oral sucker is subterminal and has a diameter of '22 -•25 mm. 

 It is i-ounded and rather shallow. The ventral sucker is slightly 

 transverse and measures ■24x"25 mm. It is only very little 

 larger than the oral sucker, and it is situated at a distance of 

 ■ g7_-84 mm. from the anterior end, i. e. about one-third of the 

 body-length. There is a distinct prepharynx followed by a large 

 pharynx measuring about -13 X "14 mm. The cesophagus is about 

 tlie same length, and the bifurcation takes place midway between 

 the suckers. The intestinal diverticula are fairly straight and of 

 considerable width. They are longer than in the other species of 

 Styphlodora, reaching to within •18-29 mm. of the posterior end. 

 They are very slightly unequal in length. 



The main excretory vesicle was entirely invisible, but it was 

 apparent that it gave off numei'ous lateral branches, which, 

 anastomosing freely, gave the body a honeycomb-like appearance. 



The testes lie obliquely behind one another, the left being in 



