Occasional specimens have been reported from northern Norway and 

 the Murman coast (Bigelow and Schroeder, 19^8), and it also ranges 

 into the Baltic Sea. On the western side of the Atlantic, it is 

 reported to be the commonest large shark in summer along the coast 

 of Nova Scotia. Other distributional data caused Bigelow and 

 Schroeder to suggest that the 65°F isothenn limits its normal south- 

 ward occurrence. 



The salmon shark of the Pacific Ocean, L. ditropis , has been 

 reported from southern California northward to Alaska, the Bering 

 Sea, and Japan (Hubbs and Follett, 19^7; Roedel and Ripley, 1950; 

 Clemens and Wilby, I96I) . Bright (1960) reported a specimen from 

 Alaska which he identified as L. nasus , but this appears to be a 

 mistake in identificaton. 



Sano (i960) presented seasonal catch records showing a graduial 

 northward extension in range of the sCLLmon shark in the northwestern 

 Pacific. In the last decade of May, none was taken north of 52°N. 

 The northernmost captures were made during the last decade of July 

 in 60O-62°W, 175°E-l80O. The daily average catch in the northern 

 area was 1.2 individuals per operating boat, with more than half 

 the total number of boats making catches. Strasburg (I958) obtained 

 28 longline records of the salmon shark in the central Pacific. Of 

 these, 26 were north of 35°N, 1 was between 30°and 35°N, and the 

 remaining record was from the Line Islands. Strasburg suggested 

 that this last record is based on a misidentified bonito shark, I. 

 glaucus . 



Smith (19^9) reported the first apparent occurrence of L. nasus 

 from South African waters; specimens were taken in Knysna and Durban. 

 The porbeagle is reported as "not abundant" in New Zealand waters 

 ( Illingworth, I961), althoiigh it occiirs from Cook Strait (southern 

 winter) south to Stewart Island. Whitley (19^0) recorded it from 

 Australian waters. 



HABITS 



The lamnid sharks are active, vigorous swimmers, as indicated 

 by their generally streamlined appearance and lunate caudal fin. 

 Bigelow and Schroeder (19^8) described the mackerel shark (L. nasus) 

 as putting up feeble resistance when hooked, but the white shark 

 and mako are highly esteemed as gamefishes. The mako particularly 

 is known for its habit of jumping, and Goadby (1959) stated that it 

 has been observed to clear the water by 10 feet. 



Most catch records for these sharks axe for sxirface waters, but 

 their depth range appears to be rather variable. The Atlantic porbeagle 

 is reported regularly down to 420-480 feet, and in winter it apparently 



