30 ClION-UliOPTERYGII. SELACHOIDEI. 



31. (1.) Notidanus indicus. (Fig. 10.) 



Notidanus indicus, Ayatwiz, 1'aixx. l<\ms. iii, pp. 1)2, i'17, t. E, f. 1 

 (teeth); Day, Fish. lndia,p. 723, pi. clxxxix, fig. 4 (see syuon.). 



Fig. 10. Notidanus indicus. 



Snout rounded and obtuse. Cleft of mouth wider than deep. 

 Teeth opposite the symphysis of the upper jaw is a tooth having 

 a single cusp, those on either side being stronger and denticulated. 

 The central tooth in the lower jaw has no median cusp, but two or 

 three lateral cusps on each side. Colour grey, with dark blotches 

 and marks. 



Hab. Seas of India and South Africa to California. 



Family V. SCYLLIID.E. 



Spiracles present. Eye without any nictitating membrane. 

 Mouth inferior. Teeth small, several rows being generally in use. 

 The first dorsal fin spineless, placed above or behind the ventrals ; 

 an anal present, which may be in front of, below, or behind the 

 second dorsal. 



St/nof>sis of Indian Genera. 



A. Nasal and buccal cavities separate ; upper 



edge of caudal tin smooth 1. SCYLLIUM. 



B. Nasal and buccal cavities confluent. 

 Minute spiracle behind each eye; second 



dorsal fin nearly opposite anal ...... 2. GINGLYMOSTOMA. 



Spiracle behind eye and equal to it in 



size. Caudal portion of body and fin 



very long 3. STEGOSTOMA. 



Spiracle below eye and well developed; 



anal fin behind second dorasl 4. CIIILOSCYLLIUM. 



1. Genus SCYLLIUM, Cuvier. 

 Syn. Scylliorhinus, Haltclurus, Poroderma, and CephaloscyUium, Gill. 



Spiracles behind the eye. Nasal and buccal cavities distinct. 

 Teeth small, in several rows ; usually with a central and one or 

 two lateral cusps. Origin of arial fin in advance of that of the 

 second dorsal ; upper edge of caudal not serrated. 



These sharks, or " dog fishes," do not attain to any large size, 

 but are much dreaded by fishermeu, as they get entangled in their 



