BY GERARD KREFFT, ESQ., P.L.S, 219 



a piece of coarse fibre-matting. The Lead and neck of 

 this species are missing. Lemnisci occur on both sides, and as 

 the joints are narrow they look very rough and tattered. Mr. 

 Masters who collected the specimen several years ago, was not 

 able to remember the habitat ; it is probably from a Northern 

 Wallaby. 



T^NIA FLAVESCENS. 



(Plate I., figs. 23, 23a, 23&, and Plate II., fig. 5). 



Total length seldom exceeding two inches, head larger than 

 the broadest proglottis, or from -jV^l^ to ith of an inch in diameter. 



Head sub-quadrangular, with rounded corners, and bearing 

 four, deep and distinctly margined suckers. Neck segments very 

 close for the length of a quarter of an inch or more, after which 

 they gradually enlarge to the last one, which is smaller The 

 marginnl lines are very seldom quite straight, and the edges 

 much produced outwards. Lemnisci were not observed but 

 the posterior half of the joints is furnished each in the centre 

 with a distinct receptacle full of ova. At first these 

 ovaria, if I may call them so, are but scantily filled, but they 

 increase in size and become fuller till the last three or four are 

 completely stufi'ed out so that the marginal lines between them 

 are altogether obliterated, (Plate II., fig. 5.) Tlie head is broad 

 and rather flat, the neck contracted, and the four circular disks 

 are right upon the upper surface with a small tubercle in the 

 middle. (Plate I., figs. 23, 23a, and 236. The disks are not 

 large enough in the sketch). 



This is one of the four species in which the colour is beautifully 

 preserved, the proglottides being pencilled and spotted with the 

 most exquisite chrome yellow. I may state that I refer to 

 dry specimens and not to the usual wet preparations ; the 

 process of preservation has been already explained. The 

 Blue Winged Shoveller (^Spatula rhyncliotis) , and the Black 

 Duck {Anas superciliosa) are the birds in the alimentary canal 

 of which the present species is found. The first one owing 

 to its very narrow and slender intestines is almost destitute of 

 Tcenia, and whenever these are present, they generally belong to 

 the species just described. 



