On a new Cestode ke. from Spitsbergen. 421 
Srives, C. H., and Hassan, A. 1920. ‘ Index-Catalogue &c., Round- 
. worms.” U.S. Pub. Health Service, Hyg. Lab. Bull. no. 114. 
Washington. 
Travassos, L. 1921. ‘Contributions 4 l’étude de la Faune Helmin- 
thologique du Brésil— XIII. Essai Monographique sur la famille 
des Trichostrongylidze, Leiper, 1909.” ~ Mem. d. Inst. Osw. Cruz, 
vol. xiii. pt. 1. Rio de Janeiro. 
LIII.—A new Cestode and other Parasitic Worms from 
Spitsbergen, with a Note on Two Leeches. Results of the 
Oxford University Expedition to Spitsbergen.—No. 6. 
By H. A. Bayuis, M.A., D.Se. 
(Published by permission of the Trustees of the British Museum.) 
Tue parasitic worms collected by members of the Oxford 
University Expedition to Spitsbergen include a new and 
interesting Cestode from a seal, two species of Acantho- 
cephala, and one of Nematoda. The writer is indebted to 
Mr. C.S. Elton for kindly handing this material to him for 
determination. 
The following are the species contained in the collection :— 
CESTODA. 
CYCLOPHYLLIDEA. 
I'am. Tetrabothriide. 
Anophryecephalus anophrys, gen. et sp, n. 
Host : a young female seal (Phoca hispida?). Locality : 
Klaas Billen Bay. 
This interesting form agrees closely with typical species of 
the genus Tetrabothrius in its general anatomy, but differs 
strikingly from that genus in the structure of its scolex. 
In Tetrabothrius the scolex is always provided with “ auricular 
appendages,’ more or less highly-developed, but in the 
present species such structures are entirely absent, the 
scolex having the general appearance of that of the Anoplo- 
cephalide or of certain unarmed genera of other families. 
The material consists largely of fragments, but the length 
of a complete specimen appears to be about 65 mm. ‘The 
maximum width of the strobila is about 0°85 mm, The 
dorso-ventral thickness is relatively great, so that some 
specimens are almost cylindrical in shape. The scolex 
(fig. 1) is somewhat compressed dorso-ventrally, and has a 
