FAMILIES AND GENERA. 69 



Scopelidse. (PHYSOSTOMI.) Plate xxiv. 



Paralepis, 186. 



SeorpsenidSB. (ACANTHOPTERYGII.) Plate iii. 

 Sebastes, ig. 



Scylliidse. (SELACHOIDEI.) Plates xxix. and xxx. 



Pristiurus, flat spines on sides of upper edge of caudal, 232. 

 Scjllium, no flat spines on sides of upper edge of caudal, 230, 231. 



Sparidse. (ACANTHOPTERYGII.) Plates ii. and iii. 

 Cantharus, pectorals 14, no molar teeth, 10. 

 Box, pectorals 21, no molar teeth, n. 

 Pagnis, pectorals 15 or 1 6, molar teeth and canines, 12, 13. 

 Pagellus, pectorals 15 to 17, molar teeth and no canines, 14 18 



SpinaCidiB. (SELACHOIDEI.) Plates xxx. and xxxi. 

 Dorsals with spines. 



Centrina, spine in middle of each dorsal, 235. 



Acanthias, spine in front of each dorsal, 233. 

 Dorsals without spines. 



L&maygus, first dorsal remote from ventrals, 234. 



Echinorhinus, first dorsal opposite ventrals, 236. 



Squatinidse. (SELACHOIDEI.) Plate xxxi 

 Rhina, 237. 



Sternoptyehidse. (PHYSOSTOMI.) Plate xxiv. 

 Argyropelecus, without scales, 187. 

 Mauvolicus, with scales, 188. 



Stromateidse. (ACANTHOPTERYGII.) Plates iv. and v. 

 Centrolophus, 30, 31. 



Syngnathidae. (LOPHOBRANCHII.) Plate xv. 

 Pectorals absent ; body smooth. 



Nerophis, 116-118. 

 Pectorals present ; body ridged. 



Hippocampus, tail prehensile, crest with coronet, ng. 



Syngnathus, tail not prehensile, no coronet, humerals united into 1 

 breast ring, 115. 



Siphonostoma, tail not prehensile, no coronet, humerals movable 

 and not united, 114. 



