328 



PROCEEDINGS OF THE NATIONAL UUSEUH. 



vol. :;s. 



( 'oinpiiriilivi measurements of Atlantic ami Pacific chub-mackerels. 

 ATLANTIC SPECIMENS. 



Locality. 



Point Judith, Rhode Island . 



Do 



Do 



Do 



Vineyard Sound 



Fulton -Market 



".1. I lair 



Venice, Italy 



Total 



length in 



inches. 



9 

 »i 



n 



12 

 1 _ '. 



11 



Head in 

 lengt h 

 wit I 1 - 

 caudal fin. 



3. 72 

 3. T(i 

 3. 72 



3. 72 

 3.70 

 3. 78 

 3.65 



Distance 



from tip (if 

 snout to 



ill of 



first dorsal 

 in length 

 without 

 caudal. 



2. 80 

 2.80 

 2 84 

 2.84 



J. 77 

 2. 76 



2. 72 



Distance 



from origin 



first dot 'i 



to origin 



second 



dor al In 



length 



without 



caudal. 



2.97 

 3.08 

 3.11 

 3.17 

 3.11 

 3. 02 

 2. 95 

 3.12 



Distance 

 from tip of 

 i" .\ it jaw 

 to base of 



\ • niral in 



length 



without 



caudal. 



.; ii 

 3. 07 

 3.22 



:;.().' 

 3.08 



PACIFIC SPECIMJ NS 



Eakodate, Japan 



Do 



Do 



Awa. Japan 



Luzon, Philippine Islands 



1K1 



Santa Barbara, California. 



South America 



Do 



Do 



Do 



7 

 51 



■•■: 

 ij 



hi'. 



14 



11'. 



.. 23 

 3.41 

 3.37 

 3. 29 

 3. 2] 

 3.23 

 3. II 

 ;;. n 



3.24 



2.64 



2. 7.", 



2.60 

 2. 7 1 

 2.67 



2. 57 



2. -14 



3. 22 

 3-26 



3.21 



3.23 

 3.21 

 3. ii 

 3. 33 



:;. 1 1 



2. 85 

 2.90 

 2.88 

 2.71 

 2.78 

 2. 80 

 2.84 

 2.61 



2.75 



Average proportional measurements of Atlantic and Pacific -specimens. 



Locality. 





Total 



length in 

 inches. 



in; 

 9fV 



Bead in 



lengl h 



without 



caudal tin. 



Disl 



from tip of 

 snout to 

 origin of 

 lorsal 



in length 

 wit 1 

 caudal. 



3.74 

 3. 26 



2. 79 

 2 60 



Distance 



from origin 



firsl dorsal 



to origin 



second 



dorsal in 



length 



without 



caudal. 



;; 06 



I 'Malice 

 from tip of 

 ■ 'aw 

 e Of 



ventral in 

 lcn. 



\\ Ithoul 

 caudal. 



3.07 

 2. 76 



Proportional measurements of specimens of about the sann length from both oceans- 





Total 

 length In 

 lies. 



lith, Rhode I land. 

 itta Vmeric i. . 



Peru, South v 



14 



Head In 



length 



\\ it l i 



caudal (In. 





I n tarn e 



tip of 



snout to 



origin of 



lorsal 



in length 



« ithoul 



caudal. 



2.84 



2 is 



I listance 

 from origin 

 firsl dorsal 



to origin 

 second 



dorsal in 



length 

 u it 1 K.I it 



i tudal 



3.11 

 ». II 



Distance 



from tip of 

 > jaw 



to base of 



ventral in 



leiiL''li 



wit hout 



caudal. 



3.07 

 2.61 



2 6 I 



These figures show a well-marked difference between the Atlantic 

 and Pacific chub-aiackerels that is of specific value, and the Atlantic 

 form should, therefore, retain the name Scomber colias Gmelin and 

 the Pacific form the name Scomber japonicus Huttuyn. 



