14 
THE VOYAGE OF H.M.S. CHALLENGER. 
14. Taenia trichoglossi, n. sp. (?) (PI. II. fig. 15). 
Specimen labelled : “ Taenia from intestine of Trichoglossus swainsoni , 1 from Cape 
York, Australia.” 
The vessel contained nine fragments of a Taenia , but without a scolex. The most 
anterior proglottides are 0T8 mm. in length, and 0'84 mm. in breadth, while those 
furthest back are IT mm. long by 2T mm. broad. The largest fragment measures 
80 mm., and the chain of proglottides has a wreath-like form. The specimens 
possibly belong to Taenia leptosoma, Diesing, found in various Parrots. The ova are 
spherical, and have two transparent sheaths, of which the outer measures 0’036 mm., 
and the inner 0‘026. The oncosphere has an elliptical contour, and measures 0‘023 mm. 
in length by 0 ‘01 8 mm. in breadth. 
15. Tetrabothrium torulosum, n. sp. (PI. II. figs. 16, 17). 
This form was in the same tube as Taenia diomedeae ; its locality of occurrence was 
therefore the stomach of Diomedea brachyura, Temm. The vessel contained three 
specimens and four fragments. The length of the largest animal was 175 mm., the breadth 
0‘84 mm., increasing to 5 mm. posteriorly, with, a thickness in the same region of 2 mm. 
The scolex is 1 mm. in breadth, and 0‘96 mm. in length. No proglottides are recog- 
nisable, but the body exhibits close folds about 0T2 mm. in length. The body is very 
compact. The intact adult must be very long, for even in the posterior portion of the 
not inconsiderable length, no mature ova are to be seen. One only finds spherical balls, 
0’023 mm. in diameter, from which the ova probably develop. The large scolex 
exhibits on both ventral and dorsal surface a pair of three-cornered suckers surrounded 
by strongly developed coiled pads. The lateral lines also exhibit strong protrusions, 
and further back there is a second pair. The folding of the body is characteristic 
of Tetrabothrium, and so is the form of the scolex and suckers. 
16. Tetrabothrium auriculatum, n. sp. (PI. II. figs. 18-20). 
Specimen labelled : “ Taenia from the intestines of Thalassoeca glacialoides , 2 February 
22, 1874, Antarctic Ocean ;” and also specimen labelled : “ Tetrabothrium from Daption 
capensis , 3 October 10, 1873, South Atlantic.” 
The animal attained a length of 112 mm. The scolex is 0'48 mm. in breadth, and 
0'34 mm. in length. The four powerful suckers occupy almost the whole of the scolex, 
and each exhibits anteriorly and externally a round, ear-shaped protrusion. The apex 
bears a round protrusion, while the ventral and dorsal surfaces show on either side three 
1 Trichoglossus swainsoni, Gould, Report on the Birds, Zool. Chall. Exp., part viii. p. 90. 
2 Thalassoeca glacialoides, Smith, op. cit., p. 142. 3 Daption capensis, Linn., op. cit., p. 144. 
