714 PLAGIOSTOMATA— SELACHOIDEI. 



distance between tlie eye and the second gill-opening. A short groove at the angle of the mouth, not extending 

 on to the upper jaw. Nostrils nearer to the opening of the month than to the end of the snout. Teeth — the 

 bases of those in the upper jaw denticulated on both sides : those in the lower jaw erect, with smooth edges and 

 a broad base. Fins — the length of the base of the anal is equal to about twice its distance from the base of the 

 ventral : the pectoral extends to nearly as far as to below the hind edge of the first dorsal, its posterior margin 

 is rather concave, its internal equals about 1/3 of the length of its outer edge ; caudal 3i to 3 J in the total 

 length. Colours — gray or brown, becoming dull white beneath : the fins gray, the caudal nearly black in its 

 posterior half : outer half of first dorsal dark : pectoral and ventral with a light edge. 



HaUtat. — Seas of India to New Guinea. The longest example obtained in Malabar, was a little over 

 twenty inches. 



8. Carcharias hemiodon. 



Garcharias (Hypoprion) hemiodon, Miill. and Henle, Plagios. p. 35, t. xix, f. 2 (teeth) ; Bleeker, Beng. 

 p. 80 ; Dumeril, Hist. Nat. Poiss. i, p. 351 . 



Hypoprionodon hemiodon, Gill, Ann. Lye. Nat. Hist. New York, vii, p. 409. 



Carcharias hemiodon, Giinther, Oatal. viii, p. 362. 



Snout obtusely rounded : the distance between the end of the snout and the mouth equals the interspace 

 between the outer angles of the nostrils. No groove at the angle of the mouth. Teeth — ^in the upper jaw 

 oblique, with the outer side of their bases serrated. Fins — the pectoral reaches to below the middle of the first 

 dorsal : the second dorsal commences opposite to or rather behind the origfin of the base of the anal. Caudal 

 fin equal to 4J in the total length. Colours — gray, becoming lighter beneath. 



Habitat. — Seas of India, ascending rivers as the Hooghly at Calcutta. 



e. Some or all the teeth serrated loth on their iases and on their cusps {Prionodon). 



9. Carcharias sorrah, Plate CLXXXV, fig. 1. 



Carcharias (Prionodon) sorrah, Miill. and Henle, p. 46, t. xvi ; Bleeker, Plagios. p. 39 and Bengal, p. 80 ; 

 Knar, Novara Pische, p. 414 ; Dumeril, Hist. Nat. Poiss. i, p. 368. 



Isoplagiodon sorrah. Gill, Ann. Lye. Nat. Hist. New York, vii, p. 410. 

 Carcharias sorrah, Giinther, Catal. viii, p. 367. 



Length of the preoral portion of the snout about equal to the width of the mouth and nearly equal 

 to the distance between the eye and the first gill-opening. No groove at the angle of the mouth. Nostrils 

 about midway between end of snout and mouth. Gill-openings rather wider than the orbit. Teeth — |-f-, those 

 in the upper jaw oblique, serrated, and with a toothed notch on their outer edge : those on lower jaw a little 

 oblique, rather narrow, situated on a broad base and serrated. Fins — pectoral falciform, extending to beneath 

 the hind third of the base of the first dorsal fin, its internal margin equalling about 1/4 or 2/7 of its outer. 

 Origin of first dorsal slightly posterior to the base of the pectoral, and not extending to above the ventral. 

 The second dorsal smaller than and slightly posterior to the origin of the anal, the latter rather nearer the 

 caudal than the ventral. Caudal fin Sj- in the total length. Colours — dull brown superiorly, and whitish 

 beneath : fins gray, lower caudal lobe and pectorals with black extremities. 



Habitat. — Seas of India to the Malay Archipelago. The example figured (18 inches long) was one 

 of Bleeker's specimens received from Dr. Hubrecht, of the Leyden Museum. I captured one of similar size at 

 Mangalore, but which is now in a bad state owing to its having had a quantity of salt enclosed with it. 



10. Carcharias Dussumieri, Plate CLXXXVII, fig. 2. 



Carcharias {Prionodon) Dussumieri, (Valenciennes) Miill. and Henle, Plagios. p. 47, t. xix, f. 8 ; Bleeker, 

 Beng. p. 80 ; Eichards. Ich. China, p. 194 ; Kner, Novara Fische, p. 414 ; Dumeril, Hist. Nat. Poiss. i, p. 370. 

 Carcharias (Prionodon) Javardcus, Bleeker, Plagiost. p. 38 ; Dumeril, 1. c. p. 369. 

 Carcharias Bussv/mim,, Giinthtjr, Catal. viii, p. 367. 



Length of the preoral portion of the snout very slightly exceeding the width of the mouth, and 

 equalling the distance between the eye and the first gill-opening. A very short groove at the angle of the 

 mouth, and only slightly extending on to the upper jaw. Nostrils nearer the opening of the mouth than to 

 the end of the snout. Gill-openings wider than the orbit. Teeth — 1|, those of the upper jaw oblique and 

 serrated, having a, notch on the outer side : those in the mandibles smaller, oblique, narrow, serrated, and with 

 a broad base. Fins — pectoral extends to the hind edge of the base of the first dorsal, its posterior margin is 

 slightly concave, its internal margin equals 2/5 of the length of its outer edge. Origin of the first dorsal a 

 very slight distance behind the base of the pectoral, and its base not extending to above the ventral. The 

 second dorsal slightly smaller than the anal. The length of the caudal equals 3| in the total length. Colours 

 — gray or dull brown, becoming white beneath : fins gray with white outer edges : upper two-thirds of second 

 dorsal blackish. 



HaUtat. — Seas of India to the Malay Archipelago. The example figured was from Malabar. 



