32 CnOXDHOPTEKYGII. SELACHOIDEI. 



2. Genus GINGLYMOSTOMA, Miiller & Henle. 

 Syn. Nebrius, Riippell. 



A minute spiracle behind the eye, which also is minute. A 

 quadrangular flap formed before the mouth by the conjoined nasal 

 valves, and which has a free cirrus on either side. A superior and 

 an inferior lip, the latter not extending across the syruphysis. 

 Nasal and buccal cavities confluent. Teeth either in many rows 

 with a strong median and one or two smaller lateral cusps ; or else 

 in merely about three rows, of which the foremost only is in use, 

 and each tooth with a convex and serrated edge. Fourth and fifth 

 gill-openings situated close together. Dorsal fins spineless, the 

 first above or behind the ventrals, the second rather in advance of 

 or opposite to the anal. 



Geoyrapliical Distribution. Red Sea, Indian Ocean to the Malay 

 Archipelago; also tropical parts of the Atlantic. 



Synopsis of Indian Species. 



Teeth in three rows, with one central and four or 



five lateral cusps; second dorsal fin larger 



than the anal 1. G. concolor, p. 32. 



Teeth in many rows, with one central and three 



or four lateral cusps ; second dorsal fin smaller 



than the anal 2. G. miilleri, p. 33. 



34. (1.) Ginglymostoma concolor. (Fig. 12.) 



Nebrius concolor, Itiippelf, A". W. Fischc, p. 02, t. xvii, f. 2. 

 Ginglymostoma concolor, Day, Fish. India, Supplement, p. 811 (see 

 synon.). 



Snout short. The nasal cirrus nearly reaches the lower lip. Teeth 

 in three rows, with one central and four or five lateral cusps, 

 having serrated edges. Fins angles of dorsal and of all paired 



Fig. 12. Ginglymostoma concolor. 



fins pointed ; second dorsal much smaller than the first, but larger 

 than the anal, and placed nearly opposite to the latter. Caudal 

 one third of the total length. 



Hah. Ked Sea, and through the seas of India to the Malay 

 Archipelago. 



