Dr. O'Bryen Bellingham on Irish Entosoa. 255 



f Small intestines of pomarine skua 

 „ - . , 7 7 J (Lestris pomarinus) . 



8. Bothnocephalus nodosus ..< SmaU mtestineB of dusky grebe (Po- 



L <ftc<?ps obscurus). 



b. Tetrabothrii. 



("Small intestines of second- 

 speckled diver (Colymbus sep- 



9 . Bothriocephalus macrocephalus* . ^ tentrionalis) . 



Small intestines of horned grebe 

 (Podiceps cornutus). 



10. tumidulus. . . . Intestines of skate (RaiaBatis). 



B. Armati. 



(Omnes tetrabothrii.) 



a. Uncinati. 



1 1 . Bothriocephalus coronatus. Large intestines of skate (RaiaBatis) . 



b. Proboscidei. 



lrt r> .i • 7 , 77 ., f Stomach, small and large intestines 



12. Bothriocephalus corollatus. I of dog _ figh ( ^ flftw J| cfln , A(Vw) . 



. 7 J Large intestines of dog-fish (Squalus 



i3 ' paleaceus . j Acanthias). 



Species dubice. 

 f Intestines and pyloric appendages of cod 

 , , T, .7 • 77 (Gadus Morrhua). 



14. Bothriocephalus -f.<> Int v estines and pyl ^ ric appenda g e s of had- 



L dock (Gadus Mglefinus). 



* Upon several occasions I have found the Bothriocephalus ma- 

 crocephalus in large numbers in the small intestines of the second- 

 speckled diver {Colymbus septentrionalis) . They usually were most 

 abundant in that part of the intestinal canal near the gizzard ; none 

 existed in the large intestines. They are from 2 to 6 inches and up- 

 wards in length ; colour white ; the articulations very readily separate 

 from one another when the animal is placed in water. The head is 

 large, and somewhat tetragonal in shape, with four lateral depres- 

 sions, two upon each side ; each is contracted in the centre of the 

 long diameter, which gives it the appearance of being divided into 

 two portions. The neck is very short ; in some the greatest diameter 

 of this part was next the head, in others next the body. The arti- 

 culations in front are almost linear ; they then increase in length and 

 eventually become campanulate. 



f The species of Bothriocephalus which inhabits the intestines and 

 pyloric appendages of the cod (Gadus Morrhua) and of the haddock 

 (G. jEglefinus) is exceedingly common. I have seldom examined one 

 of these fish without finding it, and yet it has been altogether over- 

 looked by Rudolphi and other writers. That it is a Bothriocephalus 



