ORECTOLOBIDAE. 43 



Orectolobidae. 



Body short and subeylindrical to moderate and depressed. Head narrow 

 with snout of medium length to broad with a very short snout. Tail long and 

 slender with short caudals to rather short with long caudals. Nostrils with a 

 nasoral groove and with a cirrus on the anterior nasal valve. Mouth transverse, 

 with labial folds around the angle on both jaws. Teeth compressed with or 

 without lateral cusps at each side of the median. Eyes small, without nictitating 

 membrane. Spiracle minute and behind the eye to large and more or less below 

 it. Gill openings small to medium, hindmost two or three above the pectorals. 

 Fins short and broad, except the caudal which most often is narrow and not 

 lobed. No fin spines; no pits at the root of the caudal. 

 First dorsal above the ventrals 



second dorsal in front of the anal 



tail long, caudal short; no dermal lobes 



body short; anal close to the caudal Hemiscyllium (page 44) 



tail long, caudal long 



body short; mouth inferior; anal close to caudal 



Brachaelurus (page 47) 

 anal at a short distance from caudal Hcteroscyllium (page 48) 

 tail short, caudal short; dermal lobes present 



body long; mouth nearly anterior . Orectolobus (page 49) 



dermal lobes numerous under the lower jaws 



Eucrossorhinus (page 53) 

 tail medium; caudal medium; teeth tricuspid; 



body medium ; fins rounded . . Ginglymostoma (page 54) 

 tail long; caudal long; teeth multicuspid; 



body medium ; fins angulate Nebrodes (page 56) 



First dorsal forward of the ventrals 

 second dorsal in front of the anal 



tail very long; caudal very long; fins rounded 



body short Stegostoma (page 59) 



First dorsal behind the ventrals; body short 



tail very long; caudals short; fins small . Chihscyllium (page 60) 

 First dorsal behind the ventrals 



second dorsal behind the anal . . Parascyllium (page 66) 



