BY GERARD KREFFT, ESQ., F.L.S. 223 



T^NIA MOSCHATA. 



(Plate II., figs. 9, 9a, 9b, and 9c.) 



Head rather prominent, square, with four rounded and pro- 

 duced disks one at each corner. The upper part of the head is 

 divided by a cruciform band with a tubercle in the middle. The 

 segments are not very close together, except on the neck, 

 but are regular in shape, the terminal ones being about a line 

 and a half wide. Total length ten or eleven inches, the greatest 

 breadth being about one-eighth of an inch. 



The lemnisci are situated on one side only, near the upper 

 edge of each proglottis, and commence at the distance of half an 

 inch below it, some appear broad and marked with lateral stripes 

 (fig. 9a), others are long and tapering (Plate II., fig. 9c), it is pos- 

 sible, however, that the broad lemnisci are tubes only, the organ 

 being not thrust out. The long and tapering ones occur on the 

 terminal proglottides. 



A single perfect specimen taken from the intestines of the 

 Musk duck (Biziura lohata) is in the Australian Museum collec- 

 tion. On Plate II. is figured No. 9, the head much enlarged ; 

 No. 9&, enlarged proglottides with lemnisci ; and 9a and 9c, the 

 organs themselves also enlarged. 



T^NIA RUGOSA. 



(Plate II., figs. 4, 4a, 4&, and 4c). 



Head small, surmounted by an unarmed proboscis, and now 

 slightly distorded, but fresh probably resembling the head of the 

 Common Duck Tape-worm (Plate HI., fig. 4.) The head is pro- 

 vided with the usual four indistinct disks and numerous granular 

 markings, and is attached to a tapering neck which rises suddenly 

 from the base of the more mature segments (Plate II., fig. 4&), 

 and is much contracted just below the head. The proglottides or 

 joints appear mature at the base of the slender neck, they are of 

 moderate size often almost square (fig. 4c), and very rugose 

 (fig. 4, enlarged view.) The lemnisci are on alternate sides, 

 only one to each joint, they are pendulous, short, and covered 

 by a thick sheath. The proglottides resemble those of Tcenia 



