104 BULLETIN 10 0, Uls^ITED STATES NATIONAL MUSEUM 



dorsal large, entirely behind pectoral or nearly midway between 

 latter and ventrals. Second dorsal and anal very small. Caudal cre- 

 scentic, with well-produced lower lobe. Pectoral large, partly falci- 

 form. 



Many fossils, mostly as teeth, known from the Cretaceous and 

 later. 



ANALYSIS OF SPECIES 



a'. Teeth in 24 rows above, 22 below ; lateral line inconspicuous. 

 6\ First dorsal height 3% or more in predorsal. 



c*. Anal base wholly behind second dorsal bideni 



c". Anal base partly beneath second dorsal glaucus 



&l First dorsal height less than 3% in predorsal make 



a". Teeth in 44 rows above, 56 below; conspicuous ridge as lateral line from 

 behind eye, over gill openings then to caudal carina guntheri 



ISURUS BIDENI Phillipps 



Isurus bideni Phillipps, New Zealand Journ. Sci. Techn., vol. 13, p. 227, fig. 2, 

 1932 (type locality: South Africa) (based on jaws and photograph). 



Differs from the New Zealand species in the relative heights of the 

 dorsal fins and the depth of the caudal peduncle. Body more rounded, 

 first dorsal shorter, and caudal less deeply concave. Teeth similar. 



ISURUS GLAUCUS (Miiller and Henle) 



Oxyrhina glauca MiJixEB and Henle, Syst. Beschr. Plagiostomen, p. 69, pi. 29, 

 1841 (type locality: .Java). — Schlegel, in Siebold's Fauna Japonica. 

 Poiss., pt. 15, p. 302, 1850 (Japan).— Bleeker, Verb. Batav. Genootsch. 

 (Japan), vol. 25, p. 21, 1853 (Japan) ; vol. 26, p. 42, 1854 (Japan).— DuM- 

 £ril, Hist. Nat. Elasmobr., vol. 1, p. 409, 1865 (Mer du Japon et non les 

 cotes de Java). 



Lamna glauca Gitnthee, Cat. Fishes British Mus., vol. 8, p. 391, 1870 (Cape 

 Seas; St. Helena). — Hector, Colonial Mus. Governm. Surv. Dept. (Fishes 

 of New Zealand), p. 77, 1872.— Ramsay, Proc. Linn. Soc. New South Wales, 

 vol. 5, p. 96, 1880 (Port Jackson). — Macleay, Proc. Linn. Soc. New South 

 Wales, vol. 6, p. 356, 1881 (New South Wales coast).— Ogilby, Cat. Fishes, 

 Australian Mus., vol. 1, p. 5, 1888 (Port Jackson and Botany Bay). — 

 Boulengeb, Proc. Zool. Soc. London, 1889, p. 243 (Muscat). — Stead, Fishes 

 of Australia, p. 233, 1908.— Guntheb, Journ. Mus. Godeffroy, pt. 17, p. 484, 

 1910 (St. Helena, Cape of Good Hope, Muscat). — Zugmayeb, Abh. Kon. 

 Bayer. Akad. Wiss., math.-phys. KL, vol. 26, p. 8, 1913 (Oman). 



Isuropsis glaucuts Jordan and Snydb3i, Annot. Zool. Japon., vol. 3, p. 40, 1901 

 (Naga.saki). 



Isuropsis glauca Jordan and Snyder, Annot. Zool. Japon., vol. 3, p. 127, 1901 

 (reference). — Jordan and Fowler, Proc. U. S. Nat. Mus., vol. 26, p. 623, 1903 

 (Nagasaki; Matsushima). — Jordan and Evermann, Bull. U. S. Fish Comm., 

 vol. 23, 1903, pt. 1, p. 43, fig. 5, 1905 (Honolulu).— Pietschmann, Sitz, Ber. 

 Akad. Wiss. Wieu, math.-nat. Kl., vol. 117, pt. 1, p. 675, 1908 (.Japan).— 

 Izuka and Matsutjba, Cat. Zool. Spec. Tokyo Mus. Vertebrata, p. 189, 

 1920 (Tokyo). 



Isio-opsis glaucca Jordan and Thompson, Mem. Carnegie Mus., vol. 6, p. 207, 

 1914 (Tokyo market). (Error). 



