172 



Dr. O'Bryen Belliiigham on Irish Entozoa. 



ta \ 



24. 



pCEsophagus of Colymhus septentrionalis. 

 CEsophagus and crop of kittiwake gull {La- 

 23. Ascaris variegata -^ rus tridactylus^ . 



I CEsophagus and crop of razor-bill (^Alca 

 L Torda). 



ht d t I ^^^"^^^^ ^^^ intestine of trout (Salmo 



usocau a a ^ Fario). 



25. ■ labiata , . Intestines of eel (Anguilla acutirostris). 



""Peritonaeum of herring (Clupea Harengus). 



Peritonaeum of lump-fish {CyclopterusLum,' 

 pus^. 



Peritonaeum and intestine of salmon (<Sa/- 

 mo Salar). 



Peritonaeum of cod (Gadus Morrhua). 



Peritonaeum of whiting (Merlangus vul- 

 garis). 



Peritonaeum of hake (Merluccius vulgaris). 



Peritonaeum of ling {Lota Molva). 



Peritonaeum of liolibut (^Hippoglossus vul- 

 garis). 



Peritonaeum of turbot {Pleuronectes maxi- 

 mus). 



Peritonaeum of conger-eel (^ w^TMzV/a Cowprer). 



Peritonaeum of frog-fish (Lophius piscato- 

 rius). 



Peritonaeum of gurnard (Tn^ /a Gurnardus). 



Peritonaeum of mackerel (Scomber Scom- 

 ber). 



Peritonaeum of i^iipe-fish(SyngnathusAcus), 



Stomach, intestine, peritonaeum and gall- 

 bladder of dog-fish (Sgualus Acanthias). 



y . .. /r> T \ f Small intestine of golden plover 

 heteroura (Grephn) < ^^, , . 7 • /• \ ^ 

 I {Charadrtus pluvialis). 



26 



capsularia^ < 



27. 

 28. 



cuneiformis. Intestine of gudgeon {Cyprinus Gobio). 



* The Ascaris capsularia is mentioned by Rudolphi as occurring 

 only in a single species of fish (the salmon), M^hereas I have found 

 it in fifteen different species ; it inhabits almost exclusively the peri- 

 tonaeum. This species is very common in the peritonaeal cavity of 

 the herring (Clupea Harengus) ; it is exceedingly active, and so tena- 

 cious of life, that I have kept it alive in a vessel of fresh water for 

 twenty-nine days. The three tubercles which surround the mouth 

 are very small ; the whole tract of the intestinal canal can be seen 

 through the parietes when the animal is alive, but there is no ap- 

 pearance of a convoluted ovary surrounding it. The stomach is 

 whiter and more opake than any other part of the alimentary canal, 

 and is visible through the parietes as a longitudinal white and short 

 line, which is very characteristic of this species. 



