NOTOTHENIIDAE 67 



2. 41 to 55 tubular scales in upper lateral line; jaws equal or lower a little projecting; 

 3 to 8 rows of scales between the eyes. 



a. Upper lateral line ending below or a little behind last ray of dorsal; soft dorsal 

 variegated with small, dark spots. 



(i) 20 to 25 gill-rakers on lower part of anterior arch; longest dorsal spine at 

 least § head; scales on upper surface of head roughly ctenoid; pectoral 

 § to f head jordani. 



(ii) 14 to 16 gill-rakers on lower part of anterior arch; longest dorsal spine 

 less than h head; scales on upper surface of head smooth; pectoral f to 

 f head ... ... ... ... ... ... ... ... ... tessellata. 



b. Upper lateral line extending to well beyond last ray of dorsal; soft dorsal plain 

 or with indistinct markings. 



(i) Dorsal IV-V 34-37; least depth of caudal peduncle f to f length of head. 



a. Eye 4J to 4! in head (in specimens of 120-155 mm.); 16 to 19 gill-rakers 

 on lower part of anterior arch; least depth of caudal peduncle about 

 \ length of head brevicauda. 



/3. Eye 3§ to 4J in head (in specimens of 120-190 mm.); 19 to 23 gill-rakers 

 on lower part of anterior arch; least depth of caudal peduncle less than 



\ length of head guntheri. 



(ii) Dorsal VI-VIII (very occasionally V) 34-37; least depth of caudal peduncle 



J to f length of head. 



a. 16 to 25 gill-rakers on lower part of anterior arch; interorbital width 45 to 

 nearly 6J in head (narrower in young), eye 3 (young) to 5 ; scales on upper 

 surface of head more or less ctenoid, except in large specimens, 6 to 8 

 rows between the eyes; pelvics rather shorter than pectorals, extending 

 to or nearly to vent ramsayi. 



/3. 15 to 19 gill-rakers on lower part of anterior arch; interorbital width 5! to 

 7J in head, eye 4 to 5 ; scales on upper surface of head smooth, 5 or 6 rows 

 between the eyes; pelvics shorter than pectorals, not or only just reaching 

 vent ... ... ... ... ... ... ... ... ••• wiltoni. 



y. 14 to 16 gill-rakers on lower part of anterior arch; interorbital width 7 to 8 

 in head, eye 3 to 3? ; scales on upper surface of head smooth, about 5 rows 

 between the eyes; pelvics as long as or longer than pectorals, extending 

 to origin of anal or beyond ... ... ... ... ... ... longipes. 



3. 30 to 40 tubular scales in upper lateral line; jaws equal or lower a little projecting. 



a. Depth 3§ to 4 in length (without caudal); interorbital width 3! to 4J- in head 

 (narrower in young); 13 to 16 gill-rakers on lower part of anterior arch ... squamiceps. 



b. Depth 4 to 5 in length (without caudal); interorbital width 5 1 to nearly 8 in head; 



9 to 12 gill-rakers on lower part of anterior arch ... ... ... ... sima. 



II. Opercles scaled only on upper part of operculum; upper surface of head naked. 



A. Anal 27-32, length of base about 2 in that of fish (without caudal); interorbital width 

 4§ to 13 in head; pelvics as long as or nearly as long as pectorals, extending to or nearly 

 to vent; caudal peduncle deeper than long. 



1. Interorbital width 45 to 6 in head; depth of body 3! to 4! in the length; generally 



5 dorsal spines cornucola. 



2. Interorbital width 10 to 13 in head; depth of body 6 to 7 in the length; 6 dorsal 

 spines elegans. 



9-2 



