FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 181 

 GLTPHIS MACKIEI (Phillipps) 



Prionace mackiei Phtt.t.tpps, New Zealand Journ. Sci. Techn., vol. 16, p. 238, 

 fig. 2, 1935 (type locality: Lyall Bay, WelUngton). 



Depth 8 to origin of subcaudal; head to first gill opening 5i/^, 

 Snout 2% in head to first gill opening; eye 23^ in snout. Gill open- 

 ings 5, subequal, posterior totally behind pectoral origin. 



First dorsal origin nearer ventral origin than pectoral origin, front 

 edge of fin 1% in head; length of second dorsal 1% in head; length 

 of second dorsal 13.4 in front edge of first dorsal, slightly smaller 

 than anal which opposite; anal origin little in advance of second 

 dorsal origin ; tail slender, upper caudal lobe acuminate to end, length 

 314 in rest of fish; subcaudal length i/^ of caudal length; pectoral 

 1% in head; ventral origin behind end of depressed first dorsal and 

 over half large as same fin. 



Length, 6 feet 3 inches. (Phillipps.) 



Genus LOXODON Muller and Henle 



Loxodon MiJLLEai and Henle, Syst. Beschr. Plagiostomen, p. 61, 1841. (Type, 

 Loxodon macrorhinns Miiller and Henle, monotypic.) 



Body elongate, slender, cavity less than half total length. Head 

 depressed, moderately wide. Snout long. Eye moderate, pupil 

 rounded, orbit elongate, nicitating membrane well developed and be- 

 low eye. Mouth greatly arched, with short labial fold. Teeth 

 oblique, subequal, with smooth edges, outer of which deeply notched 

 near base. Nostrils midway from snout end to mouth, nasal valve 

 with sharp lobe. Spiracle porelike, behind orbit. Dorsals above 

 space between pectorals and ventrals, second dorsal small and near 

 caudal. Caudal long, pointed, pit in front above and another below. 

 Subcaudal lobe large, notch behind. Pectorals moderate. Ventrals 

 small. 



LOXODON MACRORHINUS Muller and Henle 



Loxodon tnacrorhinus Muxlee and Henle, Syst. Beschr. Plagiostomen, p. 61, pi. 

 25, 1841 (locality unknown). — Dum^ril, Hist. Nat. Elasmobr., vol. 1, p. 395, 

 1865 (compiled).— GuNTHEK, Cat. Fishes British Mus., vol. 21, p. 662, 1871 

 (Red Sea).— Bkusina, Glasnik Naravosl. Druztva, vol. 3, p. 224, 1888 (Red 

 Sea). — Saua'age, Hist. Nat. Madagascar, Poiss., p. 510, 1891 (reference). — 

 Gaeman, Mem. Mus. Comp. Zool., vol. 36, p. 107, 1913 (Mauritius; Indian 

 Ocean ) , 



Depth 11 to subcaudal origin; head 4%, width 2i/4. Snout 2i/^ in 

 head ; eye 5%, 21/2 in snout, 2% in interorbital ; mouth width 3% in 

 head, length li/^ its width, short labial fold around each angle ; teeth 

 in 25 rows above, 26 below, oblique cusp directed outward over deep 

 notch on outer edge, edges of all entire; nostrils small, midway in 

 preoral, nasal valve with short pointed lobe, internarial 2 in preoral 



