94 



DISCOVERY REPORTS 



There are traces of reddish brown pigment on the head, tentacles, dorsal cirri and 

 elytra. 



The head (Fig. 9 a) is bilobed, and each lobe is roughly triangular. The lobes of the 

 prostomium are continued into the ceratophores of the lateral tentacles, but the cerato- 

 phore of the median tentacle lies a little above the lateral ceratophores as in Halosydna. 



•IMM 



f 



Fig. 9. 



a. Head from above. 



b. Elytral tubercles. 



c. Middle foot. 



d. Dorsal bristle. 



Hololepida australts. 



e. Uppermost ventral bristle. 



/. Bidentate ventral bristle. 



g. Intermediate type of ventral bristle. 



h. Part of ventral bristle highly magnified. 



At the postero-lateral borders of the head are two pairs of enormous contiguous eyes 

 provided with lenses. The palps reach back to the 5th chaetiger, and the three tentacles 

 and the tentacular cirri are all of about the same length, which is approximately two- 

 thirds that of the palps. Tentacles, cirri and palps are smooth. Below the median 



