Dr. O'Bryen Bellingham on Irish Entozoa. 255 



r Small intestines of pomarine skua 

 _ „ - . , , , I (Lestris pomarims) . 



S. Bothnocephalus nodosus .. ^ gmaU intestines of dusky grebe (Po- 



1^ diceps ohscurus). 



b. Tetrabothrii. 



fSmall intestines of second- 

 I speckled diver (Colymbus sej)- 



9. Bothriocephalus macrocephalus* . ■^ tentrionuUs) . 



I 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. 



,^ „ ,, . , , „ , f Stomach, small and large intestines 



1 2. Bothriocephalus corollatus. | ^^ ^^^.^^^^^ ^^^^^^^^^ AcantMas). 



, ., , f Large intestines of dog-fish (Squalus 



^^' paleaceus.i^ AcantMas). 



Species dubice. 

 rintestines and pyloric appendages of cod 



ep \ Intestines and pyloric appendages of had- 



l^ dock (Gadus ^glejinus). 



* 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. 



t The species of Bothriocephalus which inhabits the intestines and 

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

 {G. jEgleJinus) 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 



