NOTES ON CESTODE PARASITES OF BIRDS 



By Edwin Linton 

 Zoological Lahoratory, University of Pennsylvania, Philadelphia 



The material upon which these notes are based was, for the most 

 part, collected in the region about Woods Hole, Massachusetts, by the 

 late Vinal N. Edwards, As a rule it Avas preserved either in formalin 

 or alcohol without the employment of any special killing fluids. 

 Consequently the whole mounts and sectioned material, while as 

 satisfactory as could be expected, do not alwaj^s reveal as many de- 

 tails of structure as could be desired. 



It had been hoped that an examination of the fish-eating birds 

 would supply some stages in the life histories of helminth parasites 

 common to birds and fishes. This hope was not realized in the case 

 of the cestode parasites. 



Following is a list of the parasites considered in these notes with 

 their hosts : 



PARASITE HOST 



Ligula intestinalis (Linnaeus) Colymbus holboelli. 



Podilymbus podiceps. 

 Schistocephalus solidus (O. F. Miiller) Podilymbus podiceps. 

 Tetrabothrius cylindraceus 



(Rudolphi) Sterna dougalli. 



hirundo. 

 Larus argentatus. 

 atricilla. 

 marinas. 

 Tetrabothrius Jieteroclitus (Diesmg)_ Nycticorax nycticorax naevius. 



Puffinus borealis. 

 gravis, 

 griseus. 

 Tetrabothrius macrocephalus 



(Rudolphi) Colymbus auritus. 



holboelli. 

 Gavia immer. 

 Tetrabothrius sulcatus, new species— Fregata magnificens. 



Ophriocotyle proteus Fries Larus argentatus. 



atricilla. 



No. 2656.— Proceedings U. S. National Museum, Vol. 70, Art. 7. 



10582—26 1 



