86 



Records of the Indian Museum. 



[Vol. IX 



Tetrarhynchus gross us, Ru- 

 dolphi. 

 ,, solidus, Drum- 



mond. 

 ,, sp.^ Mcintosh. 



,, sp., Creplin. 



Dibothriorhynchus gracilis. 



[Ward] X vSalmon. 



J ' -i- » ' 



a + >> 



[lyiihe.] f Siliirus glanis. 



[Diesing.] * Ammodytes cicerehts, 

 Rafinesque. 



,, * Belones acus, Cuvier. 



Tetrabothriorhynchus migra- ,, 



torius, Diesing. 



Tetrabothrium min imttm , Lin- [Ward.] 



stow. 



Monobothrium hexacotyle, Lin- [Linton.] 



ton. 

 Ptychobothrium belones , Mihi. [Lonnberg.] 



Triaenophorus anguilla , Lonn . , , 



In addition to the preceding, the following parasites are prob- 

 ably adult in certain Teleosts, but I have been unable to verify 

 this statement : — 



J Salmon. 



f Catostomus sp. 



* Belone vulgaris. 

 X Anguilla ,, 



Alyselminthus gasterostei , Zed. 

 Bothriocephalus gadi barbati, Ru- 



dolphi. 

 ,, merluccii, 



Rudolphi. 

 cyprini phoxini, Leuc- 



kart. 

 salmonis carpionis, 



Rudolphi. 



Taenia cyclops, Linstow. 

 ,, cyprini idi, Rudolphi. 

 ,, gasterostei, Fabr. 



,, percae, Miill. 

 ,, salmonis, Miill. 

 ,, ,, umblae, Zschokke. 



,, ,, ivartmanni , Frol. 



,, salvelina, vSchrk. 

 ,, umblae, K.o]l. Tetrabothrium polypteri, Leydig. 

 salvelina, Lonnberg. Tetrarhynchus morrhuae, Rudol- 

 phi. 



The preceding list represents, I think, in a general way, all 

 the adult Cestodes recorded to date from Teleosts. As far as I 

 have been able to ascertain, I have excluded larval and immature 

 forms from the list. In this respect I am by no means sure that 

 this list is free from error, or that it includes absolutely every 

 adult form recorded. 



In all about a hundred species are recorded. As the total number 

 of Cestodes known is probably well over 2000 species, the per- 

 centage recorded from Teleosts amounts to less than 5 per cent of 

 known species. It will be noted that very manj' of the Teleosts 

 named, from which adult Cestodes have been obtained, are either 

 marine, or spend some part of their life out at sea. Thus, salmon 

 are marine fish which normally migrate up the rivers to spawn. 

 The eels, on the other hand, are freshwater forms which migrate to 

 the sea to spawn. In both cases it seems highly probable that the 

 initial infection is brought about out at sea. This is certainly the 

 case with the salmon. Excluding the migratory and marine 

 species from the list, the number of Cestodes recorded from fish 



