(d) Tlie gTcator jiortion o£ the trunk in a good state of preservation 
(PI. IX, Pig. 2), with the dorsal, anal, and riglit pelvic fins, 
Imt with an imperfect caudal. 
{e) Pragment of the middle portion of the trunk, with the left 
pelvic fm. 
{/) Portion of a very large trunk, prohahly of this species, showing 
the dorsal and anal tins (PI. X, Pig. 2). 
(g) Imperfect caudal fm, sliowing articulated rays (PI. VIII, Pig. G). 
General Form . — Though not exhibiting many details, the type- 
specimen (PI. IX, Pig. 1), shows the general proportions of the fish ; and 
the characters of some of the imperfect parts arc displayed in other examples. 
The entire head, including the opercular hones, is about half as long as the 
trunk ; and the body does not taper until the commencement of the dorsal 
and anal fins, in some cases, indeed, having the appearance of deepening a 
little at the latter point. The caudal jiedicle is very narrow and short, tapering, 
and fringed with the caudal fm in the usual manner. The absence of the 
pectoral fins in the type-specimen suggests that they were small and delicate ; 
and the pelvic fins are moderately powerful, and situated nearer to the anal 
than to the jiectorals. 
Jlead and Opercular Bones. — x\s shown both in the type-specimen and 
in No. h (PI. X, Pig. 1), the skull rapidly tapers in front of the orbit, and is 
prolonged into a very slender snout ; the alveolar border is nearly straight ; 
and the orbit and nasal opening, though not distinctly shown, are doubtless 
similar in form, situation, and proportions to the corresponding apertures in 
the European species of Belonorhynclms. The maudihle apjiarcntly equals 
the skull in depth, and, when crushed, is nearly similar to it in profile-outline. 
Both skull and mandible are externally ornamented by delicate ridges or 
striations, those upon the cranial roof being somewhat irregular and con- 
fused, hut those along the sides of the skull becoming parallel, vertically 
directed, and passing into transverse markings upon the snout ; those upon 
the hinder portion of the mandible (No. c) exhibit a tendency towards an 
irregular pattern. 
The dentition (PI. X, Pig. 1), is very powerful and apparently similar 
in both jaws. A widely-spaced series of very large conical teeth, with deli- 
cate superficial striations, is placed above and below, at least in the anterior 
half of the mouth; and between these teeth are several smaller cones attaining 
