182 THE PLAGIOSTOMIA. 



longer, but not so much so as on C. philippi. As the molars increase in width 

 the S3^mphyses become longer. 



Anterior gill openings wide, one and one half times the length of the orbit; 

 hindmost one third as wide as the foremost, three above the base of the pectoral. 

 Dorsals very high, length of base nearly half the height of the fin, hind mar- 

 gins deeply concave, hind angles acute. Origin of first dorsal above the middle 

 of the base of the pectoral, base ending twice its length forward from the second 

 dorsal. Second dorsal smaller than first, its base being one fourth shorter, origin 

 behind the end of the bases of the ventrals. Anal smaller than second dorsal 

 and origin little backward from the base of that fin; base more than twice its 

 length forward from the caudal, tip when applied not reaching the caudal by 

 one length of the base. Pectorals broad, longer than the head, hind margins 

 nearly straight, outer angle rather pointed. Caudal elongate, as long as the 

 distance from snout to first dorsal; subcaudal fin deep, hind margin concave. 



Light yellowish to reddish brown, darker on the back, lighter on the young, 

 with transverse bands of darker, alternating wider and narrower, or the wider 

 split into a pair of which the lower extermities are more or less curved and united. 

 A V-shaped band on the snout, behind this a straight bar separating it from 

 the orbital pair, the portions of each of which below the eye are again divided. 

 The second pair of bars is on the nape, the third in front of the dorsal spine, 

 the fourth behind the fin, the fifth in front and the sixth and seventh behind 

 the second dorsal, the eighth is at the root of the caudal and others are on the 

 caudal fin. In the main these markings agree closely with those on Plate 45 of 

 Maclay & Macleay, 1886. Slight differences may be seen in the interorbital bands, 

 which do not extend so far forward by half, in their suborbital extremities, which 

 are split, and, while the pair immediately in front of the second dorsal are joined 

 below the flank as on the plate, the two pairs behind the spine of this fin are simi- 

 larly united. 



Described from a female of nineteen inches from China. 



China to the East Indies. 



Centracion philippi. 



Port Jackson shark Phillipp, 1789, Voy. Botany Bay, p. 283, fig. 



Le Squale Philipp Lacepedb, 1798, Poissons, i, p. 218. 



Squalus philippi Schneider, 1801, Bloch Ichth., p. 134. 



Helerodontus philippi Blainv., 1816, Bull. Soc. philom., p. 121; Gray, 1851, Chondropterygii, p. 66; 



Gill, 1862, Proc. Acad. nat. sci. Phil., p. 486. 

 Cestracion philippi Cuv., 1817, Reg. anim., 2, p. 129; Lesson, 1830, Voy. Coquille, Poiss., p. 97, pi. 2; 



