IS^OTES ON LARVAL CESTODE PARASITES OF FISHES. 

 By Edwin Linton, Pli. 1). 



Professor of BioJfHiji, Washhif/ton and Jcp'trnon ('olleffe. 



The material upon which these notes are a partial report beloiig'S 

 to two distinct collections: 



First. A collection made by myself at Woods Holl, Massachusetts. 



Second. A collection belonging to the United States National 

 Museum. 



Both of these collections are large, aggregating about 600 bottles 

 and vials. By far the larger part of the collections are entozoa of hsh. 

 A report on material representing such a wide range of species, some 

 of the species re[)resented by veiy feAV or by but one specimen, can not 

 be other than unsatisfactory. It is hoped, however, that the notes 

 here given may prove to be of some assistance to future investigators 

 in the work of identification. 



It should be remarked that the finding of a- larval cestode parasite 

 encysted in the tissues of a fish is not always proof that the fish is a 

 true intermediate host. This goes without saying when the host of the 

 encysted parasite is a large shark. Beneden invented the term 

 xenosite — i. e., stranger — for this condition of parasitism. 



List of parasites and hosts. 



Ko. 



Larvnl Ecfii-nHhothria 



Ligula eJiilomycteri I Ohilomycterns fleoinetrieus . 



Cysts Sarda narda ..'. 



Gynnscion regalis 



Limanda ferruginea 



Stenotoimis rliri/sujis 



I Paraliclitliii>: ih nttttiig 



I Lojiliiii < jiini-iiliii-iii.'i 



I'liyHohotliriiim loliginis Omma.strcplifg dlecehrosus . 



Tliysanoceyhalvm, ap Omviastrephcs illccehroxns . 



lihyncliobothrium hulhifer, Linton | jluttra sctwep^fii 



" . ^ Jo)iiatomus sallatrix 



Jiliiinchobothrhim larvie : 



■fl) 



(2) 



(3) 



Centropristes itiiatiis 

 Caranx chrysos 



Angvilla chrysypa . . . 



(3a) Cynoscion regalix 



(4) 2Iicrogadiis tomcod 



(n) Scomherotnontg regalis. 



(6) Sarda .tarda 



(7) Prionotus evolans 



(8) Menticirrus saxatilU . . . 



(9) I Pliycif tfniiis 



Plate. Figure. 



II. 

 II. 

 ill. 



\iir. 



IV. 



III. 



III. 

 III. 



Proceedings U. S. National Museum, Vol. XIX— No. 1 123. 



1-9 

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12 



13-15 



16 



1 



1 



2 



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787 



