240 



Fishery Bulletin 104(2) 



Figure 1 



Triglops dorothy n. sp., holotype. female, 155 mm, USNM 74578. 



5 15 



O 



5 







o 



oo 



• *•• 



10 20 30 40 50 60 70 



Head length 



%- 

 Vs 



15 



20 25 



Dorsolateral scales 



Figure 2 



Plots of significant characters differentiating Tri- 

 glops dorothy n. sp. (o) from Triglops pingeli (•) 

 in the Sea of Okhotsk: (A) width of first infraor- 

 bital (10) pore versus head length; (B) Counts of 

 gill rakers versus dermal folds versus dorsolateral 

 scales. 



USNM 74576, 3 males (73.0-77.5 mm), 1 female (83.0 

 mm), station 5008, 46°07'50"N, 142°37'20"E, 73 m, 

 green mud, fine gray sand, 24 September 1906; USNM 

 74577, female (143.0 mm), station 5016. 46°44'30"N, 

 143°45'E, 117 m, brown mud, fine black sand, rock, clay. 

 25 September 1906; USNM 74579, 8 males (73.5-80.0 

 mm), station 5005, 46°04'40"N, 142°27'30"E, 77 m, 

 green mud, fine gray sand. 24 September 1906. The 

 following material was collected from off Kitami, Hok- 

 kaido, Japan. September 1964: HUMZ 41524, 1 male 

 (132.0 mm); HUMZ 41525, 1 male (148.0 mm). 



Diagnosis 



A species of Triglops distinguished from all other 

 described members of the genus in having the following 

 combination of character states: interorbital width 8.9- 

 11.5% HL; caudal fin truncate to slightly rounded; dor- 

 solateral scales well developed. 18-31; lateral-line scales 

 47-50; transverse dermal folds of breast 4-10; oblique 

 dermal folds 67-99; dorsal-fin rays 23-25; pectoral-fin 

 rays 17-19; gill rakers 7-12; first infraorbital pore length 

 3.6-5.0% HL; peritoneum everywhere unpigmented or 

 at most with few, widely spaced melanophores. 



Description 



Body relatively compressed, tapering gradually poste- 

 riorly (Fig. 1); head compressed, length 28.4-32.3% SL 

 (Table 1), depth 11.3-13.5% SL; snout pointed, upper 

 profile linear to slightly convex, length 27.4-36.3% HL, 

 about equal to length of orbit; length of orbit 29.0-32.0%^ 

 HL; upper jaw extending anteriorly slightly beyond 

 lower; first infraorbital pore large, length 3.6-5.0% HL 

 (Fig. 2A); gill rakers 7-12 (Table 2), 0-1 on upper part of 

 arch, 6-11 on lower part of arch, short and blunt; longest 

 pectoral-fin ray 20.9-25.0% SL (sexually dimorphic; see 

 below); third pelvic-fin ray 12.6-17.7% SL, longer than 

 first and second; length of pelvic fin sexually dimorphic 

 (see below); caudal peduncle compressed or roughly 

 circular in cross section, length 14.7-18.3%f SL, depth 

 3.1-4.1% SL. Skin covering elements of upper and lower 



