278 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



In the caecal part of the stomach, of a conger eel 

 about five feet long over 100 specimens of this distomid 

 were found. The worms while alive were blood-red in 

 colour. The size was variable : when dead after killing 

 in fresh water they were from 5 mm. to about 2' 5 mm. 

 in length. The anterior extremity in this state is usually 

 bent ventrally towards the ventral sucker. The following 

 measurements relate to a specimen which had been killed 

 in an expanded condition by slight pressure between two 

 glass slides. 



Total length : 8 mm. 



Greatest breadth : 225 mm. 



Diameter of oral sucker : - 88 mm. 



Diameter of ventral sucker: 0'92 mm. 



Diameters of ova : 0*024 x 0*013 mm. 

 The species is, doubtless, near Distomum ocreatum ox 

 Molin, but the characters of the appendiculate Distomids 

 with suckers of nearly equal size do not appear to be 

 very well marked, so I add the following description. 



The suckers are very nearly equal in size, the 

 ventral being usually only very slightly the larger of the 

 two. The mouth is sub-terminal and lying very near to 

 the pharynx. There is no distinct oesophagus and the 

 intestine passes transversely across the body without any 

 distinct fork. In life the rhythmical movement of this 

 transverse portion of the intestine is very well marked. 

 Successive peristaltic movements pass outwards from the 

 junction of intestine and pharynx, towards the lateral 

 curves of the former with great regularity, and the food 

 contents are throughout the first half of the length of 

 each intestinal ramus in a state of constant agitation. 

 The intestinal rami do not descend into the appendix — at 

 least not in the specimen figured : in other specimens, 

 however, the opposite appeared to be the case. The 



