Dr. O'Bryen Bellingham on Irish Entozoa. 323 



33. Taenia * 

 34. 



35. 



36. 

 37. 

 38. 

 39. 

 40. 

 41. 

 42. 



43. 



44. 



45. 



46. 

 47. 

 48. 

 49. 

 50. 

 51. 



Small intestine of domestic fowl (Gallus domesticus). 

 Small intestine of grous (Tetrao Scoticus). 



{Small intestine of oyster-catcher (Haematopus Ostra- 

 legus). 

 Small intestine of curlew (Numenius arquata). 

 Small intestine of godwit (Limosa rufa). 

 Small intestine of snipe (Scolopax Gallinago). 

 Small intestine of corn-crake (Crex pratensis). 

 Small intestine of tame swan (Cygnus Olor). 

 Small intestine of shieldrake (Tadorna Bellonii). 

 Small and large intestine of pochard (Fuligulaferina), 



{Small intestine of red-breasted merganser (Mergus 

 Serrator). 

 Small intestine of crested grebe (Podiceps cristatus). 



{Small intestine of red-necked grebe (Podiceps rubri- 

 collis). 

 Small intestine of northern diver (Colymbus glacialis). 

 Small intestine of razor-bill (Alca Tor da). 

 Small intestine of roseate tern (Sterna Dougallii). 

 Small intestine of gull (Larus Canus). 

 Small intestine of kittiwake (Larus tridactylus). 

 Intestine of loach (Cobitis barbatula). 



ment. Their length varies from one line to an inch and a half ; the 

 head is large and distinct ; the four oscula are also distinct ; the ros- 

 tellum is very short, thick and clavate, armed with distinct spines. 

 The larger specimens are provided with a neck, which is not seen in 

 the smaller. The articulations next the neck are merely transverse 

 rugae, and about the same width as the head ; posteriorly they in- 

 crease in length, but still their transverse diameter always exceeds 

 the antero-posterior ; the terminal articulation is short. 



* Upon one occasion I found this undescribed species of Taenia in 

 such numbers in the duodenum of a chicken only three weeks old, 

 that this part of the intestinal tube was completely blocked up and 

 obstructed by them, — some projected even into the gizzard. 



t In the month of January 1839 I found an immense number of 

 Taenia in, the small intestine of the pochard (Fuligulaferina), many 

 of which were attached to the mucous membrane : they belong to 

 the division 'Inermes ' and to the subdivision 'Rostellatce.' The head 

 is small, subhemispherical ; rostellum pyriform, about half the length 

 of the head ; oscula large and deep. The anterior articulations vary 

 in shape, sometimes being irregularly oval, the long diameter trans- 

 versely ; the succeeding articulations are exceedingly short, resem- 

 bling rather transverse rugae, and those near the posterior extremity 

 are also very short. 



