NO, 2133. FISHES TAKEN BY "ALBATROSS," 18S8— THOMPSON. 429 



i^. Gill rakers long and fine, 35 to 38 on first arch; scales less than 

 65; interorbital space 0.05 to 0.0G5. 

 j^. Scales on head small, 8 or 9 in transverse series, extending 

 forward to nostrils; first dorsal rays about one-tliird length of 



head N. ramsayi, 8. 



j^. Scales on interorbital space large, 3 in transverse series, not 

 extending beyond the anterior edge of eye; first dorsal high, 

 two-thirds length of head; scales on head rough ctenoid. 



N. jordani, 9. 

 i^. Gill rakers short, less than 35 on first arch; scales more than 65. 

 kK Dorsal V, 35 or 36; gill rakers 30 to 34; eye in a specimen 

 100 mm. long, 4 in head. 

 l^. Depth of caudal peduncle less than one-third head. 



N. longicauda, 10. 

 Z^. Depth of caudal peduncle more than one-half head. 



N. brevicauda, 11. 

 h-. Dorsal VI to VIII, 32 to 35. 



??i'. Teeth of moderate size, not canines. 



n'. Velum, from tip of lower jaw to its edge, two-thirds 



eye in adult; lower jaw longer than ujiper; gill rakers 



20 to 25; dorsal VI or VII, 32 to 34; scales from 



occiput to dorsal 15 to 20; upjjer lateral line not 



reaching nearly to caudal base N. tessellata, 12. 



n^. Width of velum (measured as above) one-half dia- 

 meter of eye in adult; lower jaw equal to upper; 

 gill rakers usually 25 to 32 on first arch; dorsal VI 

 or VII, 34 or 36; scales from occiput to dorsal 10 to 

 15; upper lateral line reaching nearly to caudal 

 base; eye in a specimen 100 mm. long, 3 in head. 

 o'. Scales in upper lateral line 65; three lateral lines 



(above characters not corroborated) 



N. trigramma. 13. 



o'^. Scales in upper lateral line 47 to 53; two lateral 



lines iV. longipes, 14. 



m'. Canine teeth present; dorsal VI, 32 or 33; gill rakers 36 

 to 39; lateral line not reaching nearly to caudal base 

 (known from description only) N. canina, 15. 



Table showing average for each species of each proportional measurement einployed. 



Species number i 



Number of specimens . . 



Head 



Depth (at pectorals) . . . 



Eye 



Snout 



Maxillary 



Mandible 



Interorbital width 



Dorsal spines 



Dorsal rays 



Anal rays 



Scales in lateral lines.. . 



Scales in series 



Scales transverse 



Pectoral length 



Pectoral rays 



Ventral length 



Caudal peduncle depth, 



Gill rakers 



Scales occiput to dorsal 



29 



0.30 



.20 



.07 



.08 



.11 



.12 



.05 



VorVI 



30 



29 



38+10 



47 



18 



0.23 



22 



0.23 



.09 



+ 11 



14 



1 See text. 



