BY GERARD KREFFT, ESQ., F.L.S. 227 



sive vermium intestinalium, Sfc.,Yol. II., Plate I., Tab. X., fig. 2), 

 from the Woodcock (^Scolojjax rusticola) which resembles the 

 young of Tcenia Bairdii, and is probably also an immature form. 

 This species is found in a great many of the Australian Ducks, 

 in particular in the Black Duck (^Anas sicperciliosa.)* 



BOTHRIOCEPHALUS (?) MARGINATUS. 



(Plate III., figs. 17 and 17a). 



This species is founded on a fragment about 3| inches in 

 length, without head, it is fully a line in thickness and nearly 

 two-eighths of an inch wide ; joints regular, straight, with very 

 broad and raised margins below, and a slightly raised central 

 papilla. The difierent segments are not produced outwards, and 

 without the aid of a lens the outer margins appear perfectly 

 straight. Mr. Masters who collected the specimen in some part 

 of Queensland (Wide Bay district I believe) is of opinion that it 

 was taken from the intestines of a Wallaby. 



DESCRIPTION OF THE PLATES. 



Plate I. 



TiENIA NOV^-HOLLANDI^. 



Fig. 1. — Natural size. 



Fig. la. — A smaller specimen of the same species. 



Fig. lb, — Another fragment of the same worm. The more 



perfect proglottides have parted, and the ovum 



which is marked fig. Ic differs consequently from 



the more perfect ova. 

 Fig. Id. — Anterior portion of the specimen No. 1 enlarged. 

 Fig. le. — Proglottides, with lemnisci enlarged, taken from the 



posterior portion of the colony. 



* I have just ascertained that the tape-worm figured on Plate HI., figs. 

 24 and 24« which I thought was new, is identical (if ova are a test) with 

 T. Bairdii. No lemnisci have heen seen in this specimen, which was 

 taken from a Stilted Plover. 



