424 Dr. O^Bryen Bellingham on Irish Entozoa, 



Poro antico majore. 

 5. Distoma clavigerum'^. Small intestine of frog (jRawa if m/?oram). 



Poris aqualibus. 

 [6. Distoma flexuosum f. Small intestine of mole {Talpa europcea),'] 



jS. Teretiuscula. 

 Poro ventrali majore. 



7. Distoma cylindraceumX. Lungs of frog (Rana temporaria). 



8. ■ varicum §. . . . Stomach of salmon (Salmo Salar). 



9. ' — gihbosum} .. Stomach of haddock (Gac?w5-^^/e^ww5). 



* The Distoma clavigerum is rather a rare species ; I have only met 

 with it once, although I have examined a large number of the Rana 

 temporaria. The animal when alive, and fully extended, measured 

 upwards of 2 lines in length (Rudolphi says it does not exceed one 

 line), when contracted about one line ; and at the widest part (about 

 the centre of the body) it is half a line in width ; it is nearly equally 

 attenuated at each extremity. After remaining in spirits of wine the 

 dorsal surface became convex, and the animal acquired a somewhat 

 elliptical shape, but was still a little wider anteriorly than poste- 

 riorly. 



f The mole is not a native of this country, consequently the Di- 

 stoma flexuosum is not an Irish entozoon ; but as it must take its place 

 among British species, I have allowed it to remain in this list. 



X The Distoma cylindraceum is very common in the lungs of the 

 frog ; it is found about the base of these organs, and is sometimes 

 accompanied by the Ascaris nigrovenosa. The body is thick, cylin- 

 drical, and of a dark colour in some places, owing to the transpa- 

 rency of the parietes, and the nature of the contents of the alimentary 

 canal or ovaries ; it becomes opake when kept in spirits of wine. 

 They live for a short time in cold water, and move sluggishly, con- 

 tracting and enlarging the pores; sometimes, after remaining in 

 water for a short time, they discharged a quantity of a dark-coloured 

 fluid from the anterior pore ; and on some occasions I have found 

 them adhering by the anterior pore to the parts in which they are 

 contained. 



§ The Distoma varicum appears to be common in salmon from some 

 localities and in some seasons, and rare in others ; it inhabits the 

 stomach and the intestinal canal near the stomach. Its length is 

 about half a line, but this varies according to the motions of the animal ; 

 when fully extended it is nearly equally attenuated at each extremity : 

 its colour is white, but the contents of the ovaries give the part of 

 the body in which they are contained a reddish yellow tinge. The 

 anterior pore is circular and small ; the ventral pore very large, the 

 whole width of the body, and its margin becomes prominent soon 

 after the animal is placed in water. 



