Dr. O'Bryen Bellingham 07i Irish Entozoa. 479 



n r> n r 7 ^ * f Intestines of plaice (Patessa vulgaris). 

 •' |_ Intestines of dab (^Flatessa Limanda). 



in the stomach, intestines and pyloric appendages. The species is 

 viviparous, as when some of the females have been accidentally cut 

 across, I have seen the young come out in great numbers, and move 

 about freely in water placed in a watch-glass. 



The CucuUanus elegaiis is more rarely met with in the eel than in 

 the perch ; sometimes they were free in the intestinal canal, at others 

 attached to the mucous membrane almost as firmly as Echinorhynchi. 

 They were of a reddish colour, the head a deeper red than the body ; 

 after remaining in water for some time, every part became white ex- 

 cept the head. 



The female CucuUanus elegans from the eel is about 4^ lines in 

 length, the male about 2 lines. The head is rounded, and is pretty 

 accurately represented in the magnified figure in Bremser's large 

 work. The striae upon the cucv.llus are numerous and run longitudi- 

 nally ; the mouth is orbicular, in some a small papilla projected ; the 

 oesophagus is narrow at its commencement, and runs in a straight line 

 to the stomach, which is somewhat oblong and double the diameter 

 of the oesophagus ; the intestine is straight, the anus is situated near 

 the posterior extremity. The vulva in the female is conspicuous, 

 projecting, seated nearer the caudal than the anterior extremity of 

 the body ; the penis of the male (in the specimens which I met with) 

 did not project externally. In the female the caudal extremity is 

 rather sharp, not obtuse as Rudolphi describes it to be; it is straight 

 in the female, inflexed in the male. 



* The CucuUanus foveolatus from the plaice, in some instances, 

 adhered firmly to the mucous membrane of the intestine ; very soon 

 after being placed in water, the integuments ruptured and allowed 

 the ovaries, &.c. to protrude. I have not observed that this species 

 is viviparous. 



The CucuUanus foveolatus from the dab is perfectly white, of equal 

 diameter throughout, except at the extremities. The females are 

 from 6 to 6^ lines in length, the males rather less ; the anterior ex- 

 tremity is obtuse, the posterior acute in both sexes ; the caudal ex- 

 tremity in the female is straight, incurved in the male. The oeso- 

 phagus is longer and wider than the stomach ; it contracts suddenly 

 where it joins the latter organ ; the stomach is cylindrical ; the anus 

 in the female is close to the caudal extremity, in the male it is a 

 little more anterior, and projects considerably ; the orifice by which 

 the penis protrudes is seated between the anus and the caudal extre- 

 mity. The penis is a double spiculum, very sharp, fine and white ; 

 the vulva in the female is situated nearer the caudal than the ante- 

 rior extremity. Several of the females, after remaining for a short 

 time in water (in which they at first moved about, but soon died), 

 ruptured, and the intestine and ovaries protruded. 



