LEAREDj ON A NEW PARASITE. 



109 



eacli side of the posterior segment of the body, and after 

 having approximated closely, as happens in other species of 

 fluke worms, end in csecal extremities. The intestine is of a 

 deep brown colour, from containing blood of the turtle, and I 

 was able, by pressure, to expel some blood discs. The space 

 enclosed by the intestine is occupied l)y large cells. No ova 

 can be seen, but certain apparently rudimentary organs may 

 be detected. The edges of the body show a finely serrated 

 appearance. I propose as a provisional name for the worm 

 Distoma constrictum, taking the term constridum from the 

 central indentations. 



A, B, Distoma constrictum magnified 20 diameters, 

 size. 



a. — Oral sucker. 



b. — ffisophagus. 



c. — (Esophageal bulb. 



d. — Ventral sucker, folded. 



e. — Intestine. 



f. — Large cells. 



g. — Rudimentary organ ? 



C, tlic same, natural 



Having submitted the worms to Dr. Cobbold for examina- 

 tion, he has kindly favoured me with the following valuable 

 remarks. 



" The parasites which you have recently forwarded for my 

 inspection do not appear to have been noticed by any helmin- 

 thologist with whose writings I am acquainted. They are 



