Dr. O'Bryen Bellingham on Irish Entozoa. 425 



rStoraach of sturgeon (^Acipenser Stu- 



10. Distomaappendiculatum*^^^^'^^^^ ^^ ^^^^_^^1 (^mmorfy^.s 



(^ Lcmcea). 



11. rnfoviride. Stomach of conger-eel (Anguilla Conger). 



12. globulus. . Small intestine of wild swan {Cygnusferus). 



,., „ i J. /-/-. T N r Intestine of lump-sucker (Cy- 



•' I \ r y 1^ clopterus Lumpus). 



Poro antico majore. 



14. Distoma excisum. Stomach of mackerel (^Scomber Scomber). 



B. Armata. 

 Echinata. 



,- T^. ^ , . 7 7 + f Small intestine of hedge -hog (£'n- 



15. Dtstoma trtgonocepnalum X. < ,. "= ° ^ 



^ ^ +1^ naceus europceus). 



* The Distoma appendiculatum, from the stomach of the sand-eel 

 {Ammodytes Lancea), is about a Hue in length ; colour white, except 

 about the centre of the body, where it has a yellowish red tinge. The 

 body is cyUndrical, and varies in shape as the animal is fully ex- 

 tended, or as the caudal extremity is retracted ; when this part is 

 retracted the caudal extremity is wider than the anterior, but when 

 fully protruded it is much more attenuated. In some of the speci- 

 mens which I examined, the caudal extremity was fully retracted, 

 in others fully protruded, and in some only partially retracted ; hence 

 they might easily be taken for distinct species. The pores are cir- 

 cular, seated near each other ; the ventral the larger, and slightly 

 prominent. 



t The Distoma from the intestinal canal of the Cy clopterus Lumpus 

 resembles the D. reflexum of Creplin ; it is about three-quarters of a 

 line in length ; colour white ; body cylindrical, nearly of the same 

 diameter throughout. The anterior pore is small and circular ; the 

 ventral large and prominent, its orifice circular. The neck (or the 

 space between the anterior and the ventral pore) is rather convex on 

 the dorsal surface and concave upon the abdominal ; it is narrow 

 anteriorly, and becomes wider as it approaches the ventral pore. The 

 ovaries appear to be full of ova. 



% The Distoma trigonocephalum, which inhabits the small intestine 

 near the stomach of the hedge-hog, is rather a rare species. It is 

 about \ a line in length, and of a dirty reddish colour after remaining 

 in spirits of wine ; body flattened, wider anteriorly than posteriorly, 

 and curved. The anterior pore is somewhat elliptical, not looking 

 forwards ; the ventral pore is orbicular, and situated nearer the an- 

 terior than the posterior extremity of the body. 



Ann. &; Mag. N. Hist. Vol. xiii. 2 F 



