258 Dr. O'Bryen Bellingliam on Irish Entuzoa. 



7. Echinorhynchus strumosus 



8. ■ striatus} . 



9 versicolor * < 



Collo vel corpore armato. 



Small intestine of seal (Phoca va- 



riegata). 

 Rectum of sea-swallow (^Sterna Hi- 



rundo^, 

 '"Small intestine of wild swan (Cyg- 



nus/erus). 

 Small intestines of tame swan (Cyg- 



nus Olor). 

 Small intestine of wild duck (Anas 



Boschas). 

 Small intestine of shoveller (Anas 



Ciypeata). 

 Small intestine of teal (Anas Crecca), 

 Small intestine of tufted duck (Fu- 



ligula cristata). 

 Small intestine of golden eye (Clan- 



gula chrysophthalmos). 



or head, which is subglobose, but not at all so large as it is in the 

 Echin. nodulosus ; the head, proboscis and neck together measure a 

 line and a half in length. All the specimens I have met with were 

 free in the intestine ; none of them attached to its coats. 



* The Echinorhynchus versicolor I have found in very large num- 

 bers in the small intestine of the tame swan ; the majority were 

 firmly attached to the mucous membrane ; some had a reddish 

 colour, others were white, but all became white after lying in spirits 

 of wine for a certain time : the longest females measured b\ lines, 

 the males little more than 3 lines ; in the largest specimens the body 

 is constricted in two places, this is not so remarkable in the smaller 

 specimens ; the proboscis is short ; the neck long, conical and un- 

 armed ; the body is somewhat thicker in front, and is armed over its 

 whole surface, but particularly anteriorly, with numerous short 

 spines. The body in the female terminates obtusely, in the male in 

 a distinct pouch. The young differ in shape from the larger ; in some 

 the body has a greater diameter posteriorly than anteriorly, and is 

 constricted in only one place. 



I have met with the Echinorhynchus versicolor in the small intestine 

 of the common wild duck^ along with the Echinorhynchus filicollis ; 

 some had a reddish colour, others were white. The anterior part of 

 the body in all is armed with innumerable very minute spines. The 

 neck is longer than the proboscis, a little wider at the base ; the va- 

 gina, from which it projects, is very distinct. 



I have found this species also, but sparingly, in the small intestine 

 near the large, and in the large intestine of the teal ; they are from a 

 line to two lines in length ; the neck is long, conical and naked ; the 

 body narrower posteriorly, constricted in some about the centre, and 

 armed anteriorly with very minute spines; the caudal extremity ob- 

 tuse in the female, terminating in a small pouch in the male. 



