FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 5 



Mouth inferior, large, arched forward, with labial folds at angles on 

 lower jaw. Teeth in jaws dissimilar, comblike, compressed, bases 

 slender, pointed cusps of variable number. Nostrils inferior, near 

 snout end, without grooves to mouth. Gill openings wide, 6 or 7, be- 

 fore pectorals. Spiracle small, lateral on neck. One dorsal, spineless, 

 opposite and like anal. Caudal long, without pits, subcaudal well 

 developed. 



Genera few and widely distributed in warm or tropical seas. Fos- 

 sils, chiefly fragments as teeth, are found in Cretaceous and Tertiary 

 deposits. The living forms are viviparous. I do not accept Carman's 

 compound family name Hexeptranchidae, as Heptranchias is the 

 earliest generic name, thus eventuating Heptranchidae. 



ANALYSIS OF GENEEA 



a\ Gill openings 7 Heptranchias 



a^ Gill openings 6 Hexanchus 



Genus HEPTRANCHIAS Rafinesque 



Heptranchias Rafinesque, Caratteri animali piante Sicilia, p. 13, 1810. (Type, 



Squalus cinereus Gmelin, monotypic.) 

 Eeptranchus Muller and Henlb, Syst. Beschr. Plagiostomen, p. 81, 1841. (Type, 



Squalus cinereus Gmelin.) 

 Adlopos (not Hiibner, 1816) Aoassiz, Poissons fossiles, vol. 3, p. 376, 1843. 



(Type, Aellopos tcagneri Agassiz, designated by Fowler, Geol. Surv. New 



Jersey Bull. 4, p. 24, 1911.) (Fossil.) {Aellopus Koch, 1842, and Aellopua 



Wolf, 1871, not involved.) 

 Notorynchu^s Atbes, Proc. California Acad. Sci., vol. 1, p. 72, 1855. (Type, 



Notorynchus maculaUis Ayres, monotypic.) 

 Notor1iy^ichu.s Gill, Proc. Acad. Nat. Sci. Philadelphia, 1864, p. 149. (Type, 



Notorynchus maoulatus Ayres.) 

 Notidanion Jordan, Stanford Univ. Publ. Biol. Sci., vol. 3, p. 97, 1923. (Type, 



Notidanus primigenius Agassiz, monotypic.) (Fossil.) 



Body elongate, partly fusiform, compressed. Head wide, de- 

 pressed, sometimes tapering forward. Mouth large, broad, with fold 

 from angle on lower jaw and deep groove behind angle. Lower 

 teeth uniform or decreasing toward mouth angles; cusps of cutting 

 edge more or less regularly graduated. Nostrils advanced. Gill open- 

 ings seven. Spiracle small. Dorsal small, behind ventrals. Caudal 

 long. 



HEPTRANCHIAS DAKINI Whitley 



Heptranchias dakini Whitley, Australian Zoologist, vol. 6, p. 310, 1931 (on 

 McCulloch) ; Mem. Queensland Mus., vol. 10, pt 4, p. 197, 1934 (reference). 



Heptranchias perlo (not Bonnaterre) McCulloch, Zool. Res. Endeavour, vol. 1, 

 p. 2, pi. 1, fig. 1, 1911 (type locality: 60 miles south of Cape Everard, 

 Victoria). 



According to Whitley, this species appears to differ from the 

 European He/ptranchias -perlo (Bonnaterre) in having the head 4^^ 



