512 



Mr. II. A, liaylis on 



I lymenolppu i=!p. 



Some fragments of the strobila of a Ilymenolepis also 

 occurred in one of the eider-ducks {Somnteria moUissima) at 

 Yukanski, together with an Aploparahsis to be described 

 below ; but the absence of a scolex makes determination 

 difficult or impossible. 



Aphparahsis Jilum (Goeze), Clerc, 1902. 



A headless fragment, perhaps referable to this si)ecies, was 

 taken from a purple sandpiper [Trinya maridma) at Yu- 

 kanski, 5. vi. 1917. 



Fiyf. 8. 



Aploparaksis murmanica. 



A. The scolex, -with extended rostelluui. 



B. Hook from the rostellum, much more highly magnified. 



Aploparaksis murmanica, sp. n. (Fig. 8.) 



Host: Somateria moUissima. Yukanski, %. vi. 1917; 

 Petschenga, 24. ix. 1917. 



This is a very small and delicate species, which was 



