THE ANNALS 



AND 



MAGAZINE OF NAT[JRAL KISTOKV 



[KIGIITII SERIES.] 

 No. (]. JUNE 1908. 



LXXII. — A Si/no})sis of the Sharhs of the Family 

 Scyliorliinidce. By C. Tate Regan, AI.A. 



The Scyliorhinidffi niuy be cHagiiosed as sliarks with two 

 dorsal fins not jneceded by spines, witii an anal fin, with five 

 fi;ill-openings on each side, the last one or two above the base 

 of the pectoral fin, with cus[)idate teeth of small or moderate 

 size, and without nictitating membranes or ovo-nasal grooves. 

 Three genera may be recognized, which may be distin- 

 guished thus : — 



I. First dorsal fin not in advance of the pelvics. 

 Dermal dtmlicles on the upper surface of the caudal 



fin similar to those on the body or uniformly 



enlarged L Sci/luir/iiuns. 



A series of enlarged flattened denticles on each side of 

 a strip of normal denticles on the u])per edge of 

 the Cfiudal fin 2. Pn'stiuntf. 



II. First dorsal fin long and low, in advance of the pelvics. 



'i. Psetifiotnacis. 



1. SCYLIOUHINUS. 



•Sn/lior/iinux, IMainvillc, Journ. Phys. 181(», p. 2Gli. 

 Scyllium, Cuv. Regne Anim. ed. 1, 1817, p. 124. 

 Cattdus, A. Smith, Proc. Zool. Soc. 1837, p. 85. 

 Poroderma, A. Smith, /. c. 



Jlaleslurus, Gill, Ann. Lye. N. York, vii. 1801, p. 4(>7. 

 C'pphalosci/llium, Gill, /. c. 



Twenty-seven species. 

 Ann. (& Mag. .V. flist. Ser. 8. Vol. i. .-^O 



