CESTRACIONTTD.E. 415 



Fam. 6. CESTRACIONTID/E. 



Characters of the single genua. 



27. CESTRACION. 



Oestracion, Cuv. (not Klein). 

 Heterodontus, liUnttviUe. 



Heterodontus, Tropidodiis cf Gyroplenrodus, Gill, Pror. Ac. Nat. Sc. 

 Philad. 18G2, p. 489. 



Two dorsal fins, with spines, the first opposite to the apace be- 

 tween the pectorals and ventrals ; the second in advance of the anal. 

 Nostrils and buccal cavity confluent. IMouth rather narrow, the 

 upper lip divided into seven lobes, the lower with a fold. Spiracles 

 small, below the posterior part of the eye. Gill-openings rather 

 narrow. Dentition similar in both jaws, viz. small obtuse teeth in 

 front, which in young individuals are pointed and provided with 

 from three to five cusps. The lateral teeth large, pad-like, twice as 

 broad as long, arranged in oblique series, one series being formed by 

 much larger teeth than those in the other series. 



Pacific and East-Indian archipelago. 



1. Cestracion philippi. 



Port Jackson Shark, Phillip, Voy. Botany Bay, p. 283, c. fig. 



Squnle pbiliiip, Laci'p. i. p. 218. 



Squalus phillippi, Bl. Schn. p. 1.34. 



Cestracion pliillipi, Cuik lihpie Amm ; Less. Voy. Coq. Zool. ii. p. !)7, 



7'ow.s. pi. 2 ; Midi. Sf Hmle, p. 76, pi. 31 ; 'Schlcy. Faun. Japoti. 



Poi.s'.s. p. 304 ; Striiver, Nov. Act. Acad. Carol. Leopold. Nat. Cur. 



xxiii. 1804. 

 Heterodontus phillipi, Blainv. Nonv. Bull. Sc. 181(1, p. 121 ; Gray, 



Cafal. Chondropt. p. 65 ; Dumcril, Elasmohr. p. 424. 

 Cestracion zebra, Gray, Zool. Misc. p. 5; Bichards. Ichth. CTiin. p. 105. 

 Heterodontus zebra, Gray, Chondropt. p. 64 ; Blcek. Verh. Bat. Gen. 



xxvi. Nieic. Nalez. Japan, p. 127, and Act. Soc. Sc. Ncerl. i. Am- 



boyna, p. 71. 

 Teeth : Ar/asa. Poi.is. Foss. iii. pi. D. figs. 11-19 ; Oiven, Odontogr. 



pi. 10. fig. 1, pi. 11. fig. 2 ; and Ostcol. Catal. i. p. 90. 



Anal fin terminating at a considerable distance from the root of the 

 Caudal. Origin of the first dorsal immediately behind the root of the 

 pectorals ; supraorbital ridges low, gradually disappearing on the side 

 of the occiput. Pody with more or less distinct dark cross bands, the 

 first of which crosses the interorbital space and the orbit. Sometimes 

 the bands are more numerous, narrower, and more distinct (zebra). 



Vertebne 110 : viz. 14 between the skull and the first dorsal 

 spine, 32 between the two dorsal spines, and 64 in the remaining part 

 of the vertebral column. 



From New Zealand to Australia, the East-Indian archipelago, and 

 Japan. 



