PARASITIC NEMATODA AND ACANTHO- 

 CEPHALA COLLECTED IN 1925-1927 



By H. A. Baylis, m.a., d.Sc. 



Department of Zoology, British Museum (Natural History) * 



Figures 1-16 



THE present report deals with the earHest consignments of material belonging to 

 these two groups obtained during the Discovery investigations, which were kindly 

 submitted to the writer by Dr S. W. Kemp for determination. It is hoped that it may 

 be followed by other reports from time to time, as further material is accumulated. 

 The period now covered is approximately the same as that covered by the Station 

 List for 1925-1927 {Discovery Reports, i, pp. 1-140), in which the localities indicated 

 only by letters and numbers will be found. 



The collection is of considerable interest, including as it does at least five species of 

 Nematoda and three of Acanthocephala which appear to be new to science, and 

 throwing new light also on the distribution of many other forms in Antarctic and Sub- 

 antarctic regions. Almost all the material was admirably preserved, and the members 

 of the expedition are to be congratulated upon their success in dealing, often under 

 very trying conditions, with these difficult groups. 



NEMATODA 

 Order ASCAROIDEA 



Family ASCARIDAE Sub-family Anisakinae 



Anisakis similis (Baird, 1853) 

 This species occurred in large numbers in the stomach of a sea-elephant {Mirounga 

 leonina) at North Bay, Ice Fjord, South Georgia, March 1926. 



Anisakis typica (Diesing, i860) 



Two females and several larvae from the stomach of a dolphin {Lagenorhynchus 



obscurtis), taken off South-west Africa, north of Saldanha Bay, are referred to this 



species. 



Anisakis physeteris (Baylis, 1823) 



This species was collected on three occasions from the stomachs of sperm whales 

 (Physeter catodofi). Localities: Durban, July 30, 1926; Saldanha Bay, South Africa, 

 August ID, 1926; South Georgia. 



J- Published by permission of the Trustees of the British Museum. 



