Dr. O'Bryen Bellingham on Irish Entozoa. 257 



LONGICOLLES. 



"Small intestine of wild duck {Anas 

 Boschas). 

 Small intestine of tufted duck (Fu- 

 4. Echinorhynchus filicollis * . < ligula cristata). 



Intestine of golden eye (Clangula 

 chrysophthalmos), by Dr. Drum- 

 mond. 



5. tereticoUisf Intestine oi trout (Salmo Fario). 



["Intestine of gillaroo trout (Salmo 



6. nodulosus} l< Fario,yaT.\ 



L Intestines of pike {Esox Lucius). 



* The Echinorhynchus filicollis has been so accurately figured and 

 described in the ' Magazine of Nat. History ' for 1839 by my friend 

 Dr. Drummond, that I have been anticipated in almost everything 

 respecting it. Dr. Drummond has detected^this species in the intes- 

 tine of the golden eye and tufted duck ; I have met with it in the wild 

 duck and tufted duck. 



The body of this remarkable species lies in the mucous surface of 

 the intestine ; the head projects upon the peritonseal surface but co- 

 vered by peritonaeum, and the neck, which is fine and strong, is con- 

 tained in the substance of the walls of the intestinal canal ; in the 

 centre of the anterior surface of the head is a small conical papillary 

 body destitute of spines ; the ova ( of which they contained a great 

 number) have an oval shape and are visible to the naked eye. 



i" I found a single specimen of the Echin. tereticollis in the in- 

 testine of a common river trout {Salmo Fario) in the month of Oc- 

 tober 1838 ; the body lay in the mucous surface of the intestine ; the 

 neck was contained in its walls (as is the case with the Echin. fili- 

 collis), and the proboscis and receptacle projected upon the peri- 

 tonseal surface, but covered by a layer of peritonaeum ; the body is 

 three-quarters of an inch long, about the same diameter anteriorly 

 as posteriorly ; colour white ; the proboscis is linear and cylindrical, 

 densely armed with minute spines ; the neck is conical, widest next 

 the body, transversely striated, and terminates in a globose recep- 

 tacle, which is flattened anteriorly and posteriorly. 



X In the intestine of a gillaroo trout and of a pike I found 

 several specimens of an Echinorhynchus which resemble the Echin. 

 nodulosus and Echin. ovatus of Rudolphi, but differ in some respects 

 from both. They belong to the same division, ' Longicolles ;* the 

 longest measures five lines, the smallest somewhat less ; the neck 

 and part of the body near it were of a light orange colour when re- 

 moved from the intestine ; the body is cylindrical, but wider ante- 

 riorly than posteriorly, and resembles in shape the body of the Echin. 

 nodulosus ; the proboscis is cylindrical, in some specimens very slightly 

 thicker in the centre than at either extremity ; the neck is cylindrical, 

 double the thickness of the proboscis, longer than it, and marked with 

 transverse rugae ; between the proboscis and neck is the receptacle 



Ann. ^ Maff. N. Hist. Vol. xiii. S 



