Pisces. 183 



SynoiJsis of the Species. 



I. Anal with 28 to 35 rays. 



A. Interorbital width 3f to G times in length of head. 



1. Six or seven rays to anterior dorsal ; interorbital region and occiput 



scaly. 

 D. 33-34 ; A. 31-33 ; Sq. 75-86 ^^ ; ventral fin f length 



ofhead 1. tessellata, Eich.^ 



D. 32-33; A. 30-31 ; Sq. 68-71 ~-^; ventral fin | length 



of head ; very strong canine teeth 2. canina, Smitt. 



D. 28-30; A. 28-30 ; Sq. 50-52 —-^ ; ventral fin f length 



ofhead 3. sima, Kich.^ 



2. Five or six rays to the anterior dorsal; interorbital region and 



occiput naked. 

 D. 32-38 ; A. 28-31 ; Sq. 67-90 ~ ; cheek entirely or 



partially naked 4. coriiceps, Eich.^ 



D. 36; A. 33; Sq. 87 ^; cheek densely scaled 5. cyaneoiraricha, Kich. 



B. Interorbital wiath 7 to 8 times in length of head. 



1. Sq. 48-54 ^^ ; A. 28-31. 



D. VI-VII, 29 ; ventral f length of head ; interorbital 



region scaly 6. marionen sis, G thr.'' 



D. VI, 33-35 ; ventral nearly as long as head ; interorbital 



region naked 7. elegans, Gthr. 



2. Sq. 66-77 ^, ; A. 31-33. 



D. V-YI, 35-37 ; ventral f to | length of head ; inter- 

 orbital region scaly 8. longipes, Stdr.® 



D. IV, 37 ; ventral f to | length of head ; interorbital 



region naked 9. nicolai, sp. u. 



C. Interorbital width 10 to 11 times in length of head; interorbital region 



scaly. 

 D. IV-V, 35-37 ; A. 33-35 ; Sq. 59-66 ^„ ; ventral as 



long as or a little shorter than head 10. mizops, Gthr. 



D. YI, 30 ; A. 32 ; Sq. 68 | ; ventral | length of head 11. acuta, Gthr. 



II. Anal with 23 to 25 rays. 



A. Interorbital width 3 to 3^ times in length of head. 

 D. VII-YIII, 26-27 ; Sq. 100-112 |i' ; gill-rakers 15 or 16 



on lower part of anterior arch; caudal emarginate 12. colbecki, sp. n. 



1 N. veifcMi, Gthr., 1874. 



2 N. squamiceps, Ptrs. 1876. N. cornucola,/. squamifrons, Smitt, 1897. 



^ K purpuriceps, Rich., 1844. N. cornucola, Rich,, 1844. N. virgata, Rich., 

 1845. N. marginata. Rich., 1845. N. cornucola, ff. calva et intermedia, Smitt, 

 1897. N. modesta, Stdr., 1898. 



* N. angustifrons, Fischer, 1885. 



•* N. squamifrons, Gthr., 1880. N. tessdlata,/. megalops, Smitt, 1897. 



