218 ON AUSTRALIAN ENTOZOA, 



Specimens occur from 12 to 18 inches and more in length, 

 and a quarter of an inch wide. Fig. 21b of Plate III., represents 

 the posterior segments of the natural size, and tig. 21a of the 

 same Plate is a view, (natural size) of the head and neck ; the 

 small dot surmounting the figure represents the natural size 

 of 21a. 



The Little Grebe (Podiceps australis) is the only bird in 

 which the Tcenia paradoxa has hitherto been found. 



T^NIA FORSTERI. 



(Plate I., figs. 4, 5, and 6). 



Head rather large with four distinct oval suckers or disks, 

 neck distinct, short, closely articulated, the segments being very 

 small but clearly separated. A prominent tubercle on the 

 anterior margin of each disk. 



The joints enlarge gradually, their margins are straight, and 

 only the last two or three larger than the rest, the terminal joint 

 being the narrowest in width. Total length two inches and a 

 half. 



I have not been able to obtain a single ovum from the few 

 specimens examined, and I find also that the shape of the suckers 

 differs ; some heads appear to have them more rounded and the 

 corner tubercle very small. The segments are not furnished 

 with lemnisci. 



Habitat : from the stomach of a Dolphin (probably Deljjhinus 

 Forsteri), caught in Port Jackson. 



T^NIA riMBRIATA. 



(Plate I., figs. 22 and 22a). 



A single fragment about two inches and a half in length and 

 a quarter of an inch wide, is all what I have seen of this singular 

 form. There is no head, and the joints are close together keeping 

 at a uniform distance throughout. The lower margin of each 

 is fringed or rather cut out, in a triangular manner, and the edges 

 are turned over, which gives the fringe a thick appearance. 

 The joints cover each other slightly, and the whole looks like 



