454 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 50. 



Every available specimen (75) was carefully measured and the 

 changes with age ascertained. The following tables give these, 

 especially for those characters supposed to distinguish N. wiltoni. 



One specimen 197 mm. 

 narrower than 0.045. 



long had an interorbital space slightly 



Among 75 specimens counted for fin rays but 1 had five spines 

 and but 2 seven in the first dorsal. The last spine is frequently 

 very short and flexible. 



In forms less than 140 mm. in total length the lower jaw appears 

 slightly longest, but above that length the upper and lower appear 

 more nearly equal, due probably to the heavier skin of the lips, etc. 



' Localities: JV. longipcs, Port Churruca, Straits of Magellan, 02-27: Sandy Point. Straits of Magellan, 

 01-3, 01-35; Albatruss station 2770, near Hilly Point, and Cape Watclimap, east coast of Patagonia, 01-55, 

 02-19, 02-20, 02-23. JV. tesHellata, Port Grappler, 01-5, 01-4; Sandy Point, Straits of Magellan, 01-6, 01^7; 

 Laredo Bay, Straits of Magellan, 01-19; Mayne Harbor, Patagonia, 02-40; Port Churruca, Straits of Magel 

 Ian. 01-54. 



