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pointed, not forked as in Aulosioma, and only immediately behind the maxillary 

 process is found the connection with the vomer, below the somewhat broadened 

 snout-end of the latter; its upper, inner margin is joined to the pointed front end 

 of the entopterygoid. As in Aiilostoiua an ectopterygoid is wanting, being replaced 

 by that part of the entopterygoid which unites wilh the oblique front margin of 

 the quadrate. The upper margin of the entopterygoid is strongly thickened, its 

 surface sculptured (fig. 5); it joins the lateral edge of the cranial beak, formed by 

 the vomer and anterior part of the mesethmoid; along the remaining edge of the 

 latter it is continued by the similarly thickened and projecting upper margin of 

 the metapterygoid, which reaches to the prefrontal. In F. petimha (and depressa) 

 this thickened part is strongly serrated, in F. tabacaria (adult) only crenulated. 



On the inner face of the pterygoids no teeth are developed, but each palatine 

 carries a row of teeth along its outer margin. 



The obliquely ascending part of the preoperculum (fig. 5, pro) covers almost 

 the whole lateral and the front face as well of the hyomandibular; the hyomandi- 

 bular foramen is quite near to the articulation with the skull. The outer face of 

 the preoperculum is beautifully ornamented wilh narrow ridges, crenulated or even 

 more or less spiny. 



The premaxilla (i) is small, pointed behind, and provided with a row of teeth; 

 the maxilla (mx) is relatively large, broadening behind. 



The articulation for the lower jaw is situated rather far behind the end of 

 the snout, about at a level wilh the upper suture between the vomer and the 

 mesethmoid. The mandible, therefore, which as in Aulostoma reaches farther for- 

 wards than the snout, is considerably elongated; it is composed like that of 

 Aulostoma, with the small angular (an) in a similar place at the lower border, 

 rather far from the posterior end. The upper margin of the dental, in front of its 

 ascending part, its provided with teeth. 



Branchial apparatus (PI. II). As in Aulostoma the hyoid (fig. 5 — 6) is 

 relatively short, and almost the whole gill-bearing part is situated behind the 

 articulation of the hyoid to the skull. The hyoid appears at first sight to lack one 

 of the typical elements, the stylohyal; but it cannot be doubted that this part 

 really is present only in a reduced state and fused to the epiliyal (eh). The latter 

 is the largest piece, especially if seen from the outer side (fig. 5); the ceratohyal 

 (ch) appears proportionately somewhat larger and the lower hypohyal (by') some- 

 what smaller than is the case in Aulostoma. There are five branchiostegal rays, 

 the lowermost very slender, fastened to the inner face of the ceratohyal, the others 

 to the outer face, one to the same piece, the three to the epihyal; they increase 

 in size upwards, the uppermost being especially stout and divided into two branches. 



The glossohyal (fig. 1, gl) is extremely long, slender and laterally compressed; 

 in length it surpasses the whole branchial apparatus; the urohyal also is long, 

 angular and increasing in thickness behind, where it reaches the front ends of the 

 coracoids, in F. tabacaria coossifying with the latter. 



