106 BULLETIN" 10 0, UNITED STATES NATIONAL MUSEUM 



Red Sea, Arabia, Cape of Good Hope, India, East Indies, Indo 

 China, Japan, Queensland, New South Wales, Tasmania, New Zea- 

 land, Hawaii. Also Chile and the Atlantic at St. Helena. Ac- 

 cording to Barnard reaches 2,100 mm. 



ISURUS MAKO Whitley 



Isiirus mako Whitley, Rec. Australian Mus., vol. 17, p. 101, 1929 (on 

 Phillipps).— Phuxipps, New Zealand Journ. Sci. Teclin., vol. 13, p. 227, 1932 

 (note). 



Isuropsis mako Whitley, Mem. Queensland Mus., vol. 10, pt. 4, p. 194 (Port 

 Jackson; New South Wales; Noonta Bay, South Australia), p. 199 (refer- 

 ence), 1934. 



Isurus glaurus (not Miiller and Henle) Phillipps, New Zealand Journ. Sci. 

 Techn., vol. 6, p. 268, fig. 13, 1924 (off Auckland; Manukau bar); Trans. 

 New Zealand Inst., vol. 56, p. 530, pi. 87, 1926 (New Zealand). 



Differs from Isurus glaucus and Isurus hideni in the height of 

 the first dorsal fin less than 3I/2 in the predorsal length. 

 Australia and New Zealand. 



ISURUS GUNTHERI (Murray) 



Lamna guntheri Mueeay, Ann. Mag. Nat. Hist., ser. 5, vol. 13, p. 348, 1884 

 (type locality: Kurrachee, India). — Day, Fishes of India, Suppl., p. 810, 

 1888 (copied). 



Isurus guntheri Gaeman, Mem. Mus. Comp. Zool., vol 36, p. 39, 1913 (copied). 



Snout much produced, partly triangular. Mouth angle midway 

 between nostril and first gill opening. "Teeth 2%g" (on p. 351 as 

 "^%8 on each side"), edges sharp, smooth, no basal cusp. Nostrils 

 conspicuous, open, nearer eye than snout tip. Gill openings sub- 

 equal. 



Skin smooth. From before eye to snout tip each side, band of 

 irregularly arranged minute pores; similar patch on cheeks and be- 

 low snout. Strongly ridged lateral line continued before caudal 

 carina along entire body over gill openings ending immediately 

 behind eye. 



First dorsal nearer pectoral than ventral, about its own length 

 behind hinder pectoral base ; anal its own length behind second dor- 

 sal; caudal with pit, upper lobe falcate, carina begins opposite anal 

 origin; pectoral narrowing falcately from base to tip. 



Dark plumbeous on upper half, grayish on lower half. Underside 

 of snout yellowish. Length, 2,220 mm. (J. A. Murray.) 



India. This nominal species is only known from the above de- 

 scription. It differs, however, from all the other species of the genus 

 in its very conspicuous lateral line, short caudal keel, and the teeth. 

 It would seem that Murray intends to give 44 teeth in the upper jaw 

 and 56 in the lower, though this is not absolutely certain. 



