DURING HIS SOJOURN IN THE WESTERN PACIFIC. 557 



VII. PROSTHEGOGOTYLE DIOMEDEAE Fuhrmann, n. sp. 



The following is a list of the Cestoda known to inhabit the Albatros : 



1. Prosthecocotyle^ sidciceps Baird. This species was described by Baird in 1859- 

 from the intestines of Diomedea exulans L. and again by von Linstow in his report' 

 on the " Challenger " Entozoa, under the name Taenia diomedeue though he suggests 

 tliat it may be the same species as Baird's. Von Linstow's specimens were found 

 in the stomach of D. albatrus Pall, living in the Pacific. 



2. P. torulosa Linstow, was described by von Linstow under the name Tetra- 

 hothrium torulosum, it also occurs in the stomach of the D. albatras from the North 

 Pacific. 



.3. P. nmhrella Fuhrmann. This species is described from an unidentified species 

 of Diomedea taken in an unknown locality. 



Amongst the tape-worms brought back by Dr Willey were some specimens taken 

 from the duodenum of Diomedea exulans L. which very obviously belong to the 

 Monticelli's genus Prosthecocotyle. Dr Fuhrmann of Neuchatel who is monographing 

 the tape-worms of birds and who has paid very esj)ecial attention to the genus in 

 question pronounces Ur Willey 's specimens to form a new species which he characterises 

 as follows : 



Prosthecocotyle Diomedeae Fuhrmann, n. sp. 



"The length of the Tape-worm is 140 mm.; the maximum width 1mm. 

 Segments very short. Scolex unarmed, with O'o mm. length 0-4:3 mm. The shape 

 of the head is quadrangular. The suckers are oval with very powerful ear-shaped 

 projections. The external longitudinal muscles form bundles of 3 — .5 fibres, the 

 internal of 3.5 — 40 fibres. The genital cloaca is very muscular. The vagina opens 

 on a prominent papilla, on the dorsal side of which is the opening of the cirrus. 

 The receptaculnm seminis has a very strong muscular sheath and is situated on 

 the outer side of the water-vascular system. The spherical cirrus pouch has a 

 diameter of 0'086 mm. The testes are 17 — 20 in number. Eggs?" 



Habitat. Host. Diomedea exulans L., in duodenum. Locality. Western Pacific. 



I here append a-s a supplement to Dr Fuhrmann's diagnosis a few notes I have 

 made on the specimens of this new species. 



At the broadest part of the body which is some little way in front of the 

 posterior end the width of the proglottides is about one millimetre. The antero-posterior 

 width of a proglottis is here about one-tenth of a millimetre. In front of this 



' Monticelli, F. S., Boll. Mus. Torino, vii. 1892, p. 8. Lonnberg, Hamburger Magalhaenische Sammelreise, 

 1896, p. 9. Fuhrmann, 0., Zool. Anz. xxi. 1898, p. 385, ibid. xxii. 1899, p. 180, and Centrbl. Bakter. xxv. 

 1899, p. 863. 



' P. Zool. Hoc. London, Part xxvii. 1859, p. 111. 



' Challenger Reports, xxiii. Part lxxi. 



74—2 



