558 Memoir Sears Foundation for Marine Research 



Table II. Osmerus. Proportional Dimensions and Meristic Characters for Three Major 

 Geographic Areas: A, 9 Western Atlantic Specimens from Cape Breton, Halifax, St. 

 John Harbor (Canada); Massachusetts Bay, Nahant, Charles River, Boston Harbor, and 

 Edgartown (Massachusetts); and New York. B, 19 Alaskan and Japanese Specimens 

 from Bristol Bay, St. Michaels, Port Clarence, and Wainwright Inlet, Alaska; Petro- 

 paulski Harbor, Kamchatka; and Mororan, Japan. C, 7 European Specimens from 

 the Elbe River; Le Havre, France; and Lake Oppmanna, Sweden. 



Averages in Parentheses. 



Standard length 



Per cent of standard length: 



Body : depth 



Head: length 



Distance from: 



snout to dorsal fin 



dorsal to adipose fin 



adipose to caudal fin 



anal to caudal fin 



Per cent of head length : 



Eye : diameter 



Distance from: 



snout to eye 



eye to nostril 



Upper jazv : length 



Counts : 



Scales: perforated by lateral line, 

 total longitudinal series . . 



Branchiostegals rays 



Gill rakers: upper, first arch 



lower, first arch 



Dorsal fin: rays 



Anal fin : rays 



Ventral fin : rays 



Pectoral fin : rays 



* Only 4 specimens countable. 



A 



97-198 (167) 



134-234 (17-9) 

 20.3-24.9 (23.1) 



49.2-52.2 (50.9) 



21.7-24.2 (23.3) 



8.7-10.8 (9.7) 



6.0- 8.0 (7.1) 



26. 3-31. 1 (29.2) 



9.7-12.2 (10.4) 



44.8-54.2 (49.6) 



15-26* 

 64-69 



7-8 

 8-1 1 

 17-21 



lO-II 



15-17 



B 



104-206 (173) 



15.2-20.0 (18.3) 

 22.2-26.9 (25-0) 



48.5-52.5 (50.1) 



20.8-27.3 (23.4) 



7.8-10.7 (9.2) 



6.5-8.8 (7.5) 



25-0-34-5 (29-3) 

 9.3-12.7 (10.3) 



47-5-59-8 (51-0) 



17-25 



64-69 



7-8 



9-10 



17-22 



10-12 



15-17 



8 



ir-13 



67-174 (139) 



17.2-20.9 (19.3) 

 23.8-26.6 (25.1) 



50.0-54.5 (51.7) 



20.4-23.1 (21.8) 



9.5-10.9 (lo.o) 



6.7- 8.7 (8.0) 



18.9-23.3 (21.4) 17.8-23.2 (19.6) 18.2-20.3 (18. 



25.0-31.6 (28.9) 



7.9- 8.8 (8.5) 

 43.8-52.2 (50.1) 



3-10 

 59-63 



7 



9-1 1 

 17-21 



lO-II 



15-17 

 8 

 11-12 



Key to Subspecies of Osmerus eperlanus 



la. Scales perforated by lateral line, 14-30. mordax Mitchill 18 15, p. 559. 



eperlanus Linnaeus 1758. 

 Northern Europe. 



lb. Scales perforated by lateral line, only 4—16. 



