488 APPENDIX. 



cheek and gill cover. The sj)inous points on the head approach 

 very near to those of hufo and porcus. The inferior preorbitar 

 tooth is acutely spinous, and points directly downwards ; the 

 two anterior ones are inconspicuous, and not very acute, and 

 the smaller upper posterior one observed in most ScorpcerKB 

 is obsolete, or, at least, completely hidden by the integuments. 

 The nasal spines are, as usual, small, simple, and acute. The 

 three supra orbitar teeth are smaller than in militaris, and the 

 middle one reclines so as to be concealed by the integument 

 instead of standing boldly up. The two low ridges between 

 the orbits do not end in spinous points. The lateral ridges 

 continued from the orbits over the supra scapulars, and the 

 temporal ridges which are parallel to them, but run farther 

 back, contain each four teeth. The infra-orbitar ridge is 

 slightly uneven anteriorly, and two reclining teeth may be made 

 out at its posterior end. The preoperculum is curved in the 

 segment of a circle, and has a short spine, with a smaller one 

 on its base, opposite to the abutment of the infra-orbitar ridge. 

 Beneath this spine there are four angular points on the edge 

 of the bone. The opercular spines are as usual two in number, 

 being the tips of two low even divergent ridges, with a curved 

 notch in the edges of the bone between them. The coracoid 

 bone is notched above the pectoral fin, the notch being termi- 

 nated below by a spine, and above by an acute corner. There 

 are no scales between the cranial ridges on the top of the 

 head, nor in the concave inter-orbital ipace. A single row of 

 five or six scales traverses the cheek below the infra-orbitar 

 ridge. The temples before the upper limb of the preoperculum 

 are densely scaly, as is also the gill flap above the upper oper- 

 cular ridge. The acute membranous lobe which fills the 

 notch between the two opercular spines is likewise scaly, and 

 there are a few scales about the origin of the ridges, but the 

 space between the ridges, the sub operculum, and the inter- 

 operculum, are naked. 



There is a short fringed superciliary cirrhus, and some 

 slender filaments from other i)arts of the head, as shewn in the 



