Dr. O'Brycn Bellingliam on Irish Entozqa. 399 



tractile tentacula, armed with recurved hooks. Contained in a 

 double cyst, to which they are not adherent. 



Tills genus^ under the name Floriceps, was established by 

 Cmier. Rudolph! changed the name to Anthocephalus, which 

 has been adopted by zoologists since. The species are only found 

 in fish, and are not numerous, Rudolphi enumerating but five 

 species. 



- . ^ , , , , ^ i f Cysts in peritoneum and liver of 

 1. Anthocephalus elongatus . | ' ^^^,^^^^ \orthagoriscus Mola^ 



r Cysts in peritoneum of whiting 

 . , 7 i J, J {Mcrlangiis vulgaris'). 

 "' ^ * \ Cysts in abdomen of pouting (Cac/ws 



\_ luscus). 



* In the month of July 1839 I found several specimens of the 

 Anthocephalus elongatus in cysts upon the surface of the liver and in- 

 testine of the sun-fish (Orthagoriscus Mola). This remarkable spe- 

 cies has been well figured by Bremser, and is described in Iludolphi's 

 work. I gave a short description of it and some other species fi'om 

 the same animal in the last volume of Charlesworth's ' Magazine of 

 Natural History'; subsequently I was amused to see a description of 

 (what appears to be) this species in one of the numbers of the 

 * Edinburgh Philosophical Journal/ in which it is considered a new 

 species and named accordingly. 



t In the month of April 1838 I found several pyriform and oblong 

 cysts of a yellowish colour in the abdominal cavity of the whiting 

 (Merlangus vulgaris) ; some were attached by a slender cord to the 

 pyloric appendages or stomach, others were imbedded between the 

 coats of this viscus or of the intestine. On making an incision a 

 second cyst was protruded, which changed its shape on being placed 

 in water, and evidently had some motion. The largest measured 

 from two to three lines ; they were white, pellucid, and dotted with 

 minute opake spots ; on making an incision into these a little fluid 

 escaped, and the head of an Anthocephalus was jirotruded, which was 

 moved about freely ; the four tentacula were visible through the pa- 

 rietes of the anterior portion of the body, rolled up in a spiral man- 

 ner, and were gradually protruded one after the other. 



The largest specimen measured half an inch, including the caudal 

 vesicle ; the smallest about one line ; and the cysts in which they were 

 immediately contained appeared to form the caudal vesicle. When 

 the animal was alive the head appeared to have four depressions 

 (bothrii), two upon eacli side, the shape of which was continually 

 changed ; when dead, there appeared to be only two, which had 

 somewhat an ear- shape, the margin being tumid. The tentacula, 

 when fully protruded, measured double the length of the head ; each 

 was curved inwards at its extremity, and eachv.as armed with three 

 rows of recurved liooks, the longest situated along the inner margin. 



The body in the largest specimen measured three lines, was rather 



