42 Dll. T. S, COBBOLD ON TREMATODK PA.KA.SIXES 



through. In all of them the caudal end thus exhibited a sort of 

 tail as a mere result oipost mortem changes. None of the Edin- 

 burgh specimens displayed the slightest trace of this projection or 

 of the water- vessel connected with it. 



The other points remaining to be noticed may be dismissed in a 

 few words. The uterine duct was well filled with eggs, but it was 

 nowhere abnormally distended. Approximately the ova gave a 

 measurement of yxrV^y ^^ ^^ inck from pole to pole by -j yVo ^^^^ ^^ 

 breadth. Although in Anderson's specimens the integumentary 

 spines had fallen off, they were still attached in the original spe- 

 cimens from Edinburgh, and measured on the average -g-^jy of an 

 inch in length. "With their shafts directed downwards, they sepa- 

 rately presented the form of a long cone, the base of which was only 

 ■Y^s" broad. Close to the apex each point of the spine curves 

 gently upward. In connexion with the form of the parasite, I 

 have only further to observe that the normal relative size and si- 

 tuation of the suckers is faithfully depicted from Anderson's spe- 

 cimens ; but the tail end of the body is abnormally produced, from 

 causes already referred to. 



To conclude somewhat as I began, let me remark more fully 

 upon the main points of interest suggested by these finds. So 

 few in number are the students of helminthology that it need oc- 

 casion no surprise if the internal parasites of cetaceans are little 

 studied. Apart from what is stated in the writings of systema- 

 tists (Eudolphi, Dujardin, Diesing, &c.), we have but few and 

 scant notices of cetacean parasitism. The most important contri- 

 bution is by Professor Van Beneden (' Les Cetaces, leurs Commen- 

 saux et leurs Parasites '). The Belgian helminthologist evidently 

 desired to render his list of the parasites as complete as possible ; 

 nevertheless, extended as his record is, he neither notices Campida 

 dblonga nor the remarkable cestode discovered at the same time. 

 Mr. Murray's porpoise not only yielded numerous flukes, but it 

 played the role of host to five large tape-worms (^DipJiyllobothrum 

 stemmacepTiahim') and to multitudes of nematodes infesting the 

 bronchi, the pulmonary vessels, and the heart {Prostheoosacter in- 

 fiexus and P. convolutus). Other parasites were detected in the 

 stomach ; but I referred them to the partly digested fishes whose 

 remains accompanied them. Van Beneden points to a paper by 

 Lebeck describing a round worm from the stomach of a Gan- 

 getic Dolphin (Ascaris delpliini). Dr. Anderson also found ne- 

 matodes in the intestines of Platanista ; but these correspond with 



