NO. 1782. STRUCTURE AND HABITS OF W0LFFI8HES—GILL. 



163 



Vomerine 



ill a wide patch longer than palatine, 

 molar and closely crowded, in 2 rows 

 and intervening smaller teeth; 



in small patch much shorter than palatine, 

 in some species subacute and well sepa- 

 rated; in others molar and closely 

 crowded ; 



Palatine 



molar, crowded and biserial; 



subequal in a broad band ; 



subacute, well separated and biserial; in 

 some bluntish in inner row; 



Hypopharyngeal teeth 



enlarged in an inner row and a few scat- 

 tered outside; 



Branchiostegal rays 



8, 4 slender to inferior edge of ceratohyal, 

 2 stout to hinder edge of ceratohyal, and 

 2 stout in depressed lower half of epi- 

 hyal (8 arranged in 2 groups of 4 each, 

 4 slender with insertions internal, and 

 4 stout with insertions external); 



7, 3 slender to inferior edge of ceratohyal, 

 2 stout to hinder angle of ceratohyal, 

 and 2 stout to outer surface of epihyal 

 near lower edge (7 arranged in 2 groups, 

 1 of 3 slender with insertions internal, 

 1 of 4 stout with insertions external) ; 



complete. 



Ossification 



I incomplete, the appearance sponge-like. 

 Cranial axis 



angular, the vomer subtending a high an- 

 gle with the parasphenoid. 



nearly rectilinear, the vomer being on the 

 same line as the parasphenoid. 



Parasphenoid 



much compressed, very narrow in front 

 of cerebral chamber. 



rather wide and expanded sideward in 

 front of cerebral chamber. 



much compressed and very narrow 

 (pinched) between interorbital region 

 and supraoccipital. 



Postfrontal region 



rather depressed and broad between in- 

 terorbital region and supraoccipital. 



Sphenotic and parietal 



separated by a large deep pit circum- 

 scribed by the approximation of the 

 bones before and behind. 



separated only by regular suture and 

 meeting in a ridge. 



Suprascapula 



undivided and prolonged forward over 

 the splienotic-parietal pit, and con- 

 nected with the ridge in front and 

 clamped behind by the approximated 

 sphenotic and parietal. 



undivided and attached to the inner sur- 

 face of the periotic ridge. 



Actinosts 



(two and three) not or little constricted 

 at middle. 



(two and 

 middle. 



three) much contracted at 



