30 



TERRA NOVA' EXPEDITION. 



Zone. These have the interorbital region narrow, bu1 resemble the tessellata 

 group in the scaling of the head. 

 (I) the marionensis group, differing from the lasl in that the cheeks and opercles 

 arc scaly above, naked below. This includes only N. marionensis, from 

 Marion Island, and N. anqnstifrons, from South Georgia. 



Fig. 3. Distribution of Bovichthyidae : P. Pseudaphritis urvillii ; CI, Cottoperca gobio ; C 2, C. macropli- 

 thalma : C 3, C. macroeephala : B 1, Bovichthys variegatus ; B 2, II. angustifrons ; B 3, />'. diacanthus ; 

 B4, /.'. chilensis ; B 5, /.'. patagonicus ; B6, />'. veneris; B7, />'. decipiena; B 8, 7.'. psychrolutes ; 

 B9, B. roseopiclus. 



(5) the coriiceps group, with the upper surface of the head naked and the opercles 

 scaled only on the upper pari of the operculum. This includes the last eight 

 species and is the only croup found in both zones. 



