870 lieut. -col. playfair on [nov. 14, 



203. Carcharius bleekert. 



Carcharius {Pi-ionodon) bleekeri, Dum. Hist. Poiss. i. p. 367. 



Prseocular portion of snout a little less than the width of the inter- 

 ocular space. Nostrils equidistant between the point of the snout 

 and the anterior of the mouth. Teeth different in each jaw ; those 

 in the upper jaw are oblique, with a reentering angle on the exterior 

 side, and are denticulated both on the point and base ; those in the 

 lower jaw are straighter and more finely denticulated. The first 

 dorsal commences a short distance behind the interior angle of pec- 

 torals, and is more than four times as high as the second, which is 

 situated immediately above the anal, and, like it, has the posterior 

 angle much prolonged. Caudal one-fourth of the total length ; its 

 upper lobe is twice the length of the lower one. The extremity of 

 the pectorals, particularly underneath, the superior angle of the 

 second dorsal, but not the first, and the angle of the inferior lobe 

 of caudal are marked with deep black. — A. Dum. 



Length 3' 10". 



Hub. Seychelles ; Pondicherry. 



Two typical specimens of this species exist in the Paris Museum ; 

 length respectively \^'3\ and 0"''78. 



204. Zyg^na malleus, Shaw. 

 Creole name " Marteau." 



205. Tri^nodon obesus. 



Squalus obesus, Riipp. N. W. Fische, p. 64, pi. 18. f. 2. 



Tricenodon obesus, Miill. & Henle, Plag. p. 55, pi. 20 ; Dum. Hist. 

 Poiss. i. p. 386. 



Snout short, rounded. Nostrils equidistant between the anterior 

 edge of the mouth, which is broader than high, and the extremity of 

 the snout. They have a transverse valvule, small, and without cirrhus. 

 Teeth with an elongated median point, and with one or two toothlets 

 on each side of the base ; some have a double toothlet on the inner 

 side. First dorsal nearer the ventrals than the pectorals. Anal 

 opposite, and nearly equal to the second dorsal. A semicircular 

 groove at the top of the root of the caudal. Lower caudal lobe about 

 half as long as the upper. 



General colour grey ; the superior angle of both dorsals and the 

 points of both caudal lobes of a milky white. — A. Dum. 



Creole name " L'endormi." 



Hab. Seychelles ; Red Sea. 



206. Galeocerdo tigrinus. 



Galeocerdo tigrinus, Miill. & Henle, Plag. p. 59, pi. 23 ; Dum. 

 Hist. Poiss. i. p. 393. 



Snout flat, rounded, and rather short. Nostrils lateral, equi- 

 distant between the extremity of the snout and the anterior of the 

 mouth. Circular spout-holes behind the eyes. Median tooth of 



