574 Notices of Irish Entozoa. 



not be straightened ; it is everywhere indeed remarkably solid 

 and unyielding, and hence the specific term which I have ap- 

 plied to it. 



I preserved two specimens in alcohol, and dried the others 

 on a slip of glass. The former have retained their original 

 appearance and dimensions, and the latter are like horn, and 

 of about half their former thickness. The proboscides dried 

 white. None of the specimens, when found, showed any 

 symptoms of life ; and, excepting some obsolete transverse 

 striae on the narrow portion of the body, there was not the 

 least mark of articulation. 



BOTHRIOCEPHALUS pUUCtatllS. 



" Both, capite bothriisque marginalibus oblongis, collo nullo, articulis 

 corporis plani anterioribus elongatis, reliquis sub-quadratis." — Rud. ' Ent. 

 Synops.' p. 138. 



Tcenia Scorpii, 'Zool. Dan.' vol. ii. p. 5. t. 44,/. 5 — 11. 



Habitat intestines of the father lasher, Coitus Scorpius, 

 Gadus minutus, turbot, brill, Pleuronectes Boscii, Pleur. Pe- 

 gosa, sole, and Trigla Adriatica. 



I have as yet detected this species only in the Cottus Scor- 

 pius and Cot. bubalis, the brill, or, as it is here named, the 

 brett, (Pleuronectes rhombus), and the turbot. lit is usually 

 found with its head and anterior part lodged in the pyloric 

 coeca, while the posterior end hangs free in the duodenum. — 

 It is very common in the Cottus Scorpius, and Cot. bubalis, 

 when they have acquired nearly their adult growth, but is 

 rare in younger specimens. I have found it largest in the 

 brett, exceeding even three feet in length and as many lines 

 in breadth ; in the Cottus I have found it two lines broad 

 and from twelve to eighteen inches long ; but in the turbot, 

 so far as my observation has as yet gone, it is seldom more 

 than a line broad, and varies in length from eight to eighteen 

 inches. But in this fish it is often exceedingly numerous, 

 and involved in a mucus almost as tough as birdlime. I have 

 preserved in alcohol, from one fish, fully two hundred speci- 

 mens ; and from another, a number considerably greater. 



The description of this species, which was first discovered 

 by Liewenhoeck, has been so fully particularized by Miiller 

 and lludolphi, that little is left but to follow their statements. 

 According to the account given by the latter, this worm is 

 from one to two feet long, and from half a line to a line and 

 a half broad, white, the ovaries frequently blackish. 



Head polymorphous, assuming various forms while living, 

 and not always the same when dead : generally oblong, and 



