REVISION OF CARCHARHINID SHARK GENERA — SPRINGER 589 



Its apparent absence from Oceania is in accord with the distributions 

 of the other species discussed in the present study. 



The species is quite common in Phihppine waters. I saw large 

 numbers of small specimens in the Manila fish market during April 

 1962. Its relative abundance elsewhere is unknown although Setna 

 and Sarangdhar (1950) report it as uncommon in Indian waters. 



Wheeler (1959), who gave an excellent description of Loxodon, 

 reported the species common at Zanzibar. His longest specimen was 

 905 mm. An 850 mm. female contained two embryos. One specimen 

 was caught in a trammel net at a depth of about four fathoms. 



NoMENCLATURAL DISCUSSION. — The typcs of the nominal forms, 

 except Scoliodon ceylonensis Setna and Sarangdhar and S. jordani 

 Ogilby, were examined and apparently are the same species. The 

 holotype of S. jordani was reported by Ogilby (1916) as having been 

 destroyed. The short outward-directed upper labial groove and the 

 appressed pectorals extending only to beneath the origin of the first 

 dorsal fin of S. jordani indicate that it was probably a Loxodon. No 

 type was designated for S. ceylonensis but the tooth counts and the 

 nature of the labial folds as given in the original description place it in 

 Loxodon. Setna and Sarangdhar (1950), without comment, placed 

 their species in synonymy with Carcharias acutus Riippell; however, 

 the figures and description they give are clearly those of a Loxodon, 

 and, as such, confirm my suspicions concerning the original description. 



Material. — no locality: ISZZ 4479 (1: ca. 315 mm., embryo, 

 holotype of Loxodon macrorhinus) . kenya: Shimoni, DIRU 15A 

 (1: ca. 900, head and skin). Mauritius island: MCZ 513 (1: 421, 

 embryo). Seychelles islands: BMNH 1869.5.14.15 (2: ca. 315-ca. 

 335, embryos), red sea: NFIS 926 (1: ca. 345, embryo), NMV 

 [no number] (1: 858). egypt: Kosseir, SMNS 1787 (1: ca. 375, 

 embryo), gulf of oman: Muscat, BMNH 1892.1.16.9-10 (1: 734). 

 SUMATRA: Padang, NMV [no number] (1: 691). misol island: 

 BMNH 1870.8.31.70 (or .79?) (1: 660). amboina island: BMNH 

 1858.4.21.511 (1: 513), BMNH 1867.11.28.174 (1: 573, male, listed as 

 type of Carcharias dumerili Bleeker, but Bleeker described the species 

 from a 553 mm. female), RNH 7371 (1: 543, holotype of Carcharias 

 dumerili). Australia: Queensland, QMB [number missing] (1: 797, 

 this specimen was with a group of sharks, aU from Queensland; tags 

 had corroded); Noosa Head, QMB 113/1526 (1: 521, holotype of 

 Scoliodon affinis). Philippine islands: Oriental Negros, Dumaguete, 

 SU 26821 (1: 356, embryo), SU 26819 (1: 391, embryo), SU 13670 

 (1: 498); Limbones Cove, USNM 170560 (1: 572); off Luzon Point 

 (1: 745); Manila area, USNM 197349 (3: 500-544). Formosa: 

 Thape, ISZZ 6964 (2: 429-443). japan: East China Sea, UMMZ 

 177117 (1: 668). 



