14 
ie.g., Nos, a and c) indications of long, slender neural arches and spines can 
l)c distinguished. As usual among the Pahnoniscidjc, there is no evidence of 
rihs ; and the only remains of li?cmal arches are four stout hones, n itli 
slightly expanded extremities, supporting tlie lower lohe of the caudal tin in 
the type-specimen (PI, IV, Pig, 1), 
Appendicular Skeleton . — Of the pectoral arch, the supraclavicle, 
clavicle, and iufraclavicle are shown also in the type-specimen (PI, IV, 
Pig, 1), The supraclavicle {s. cl.) is nearly four times as long as its 
maximum breadth ; the upper extremity is narrowest, and immediately below 
this is a slight rounded excavation of the posterior margin, whence the hone 
very gradually ex])ands downwards and is radiately striated. The clavicle 
{cl.) is bent forwards as ordinarily, at a point much nearer the inferior than 
the sujierior extremity, and there is either a flexure or thickening of the 
anterior concave margin. The ascending limb is pointed above, narrow, with 
the hinder margin gently curved, and the surface is marked by fine striae not 
precisely parallel to its long axis, hut slightly sloping forwards ; the lower 
limb is short, l)road, and expanded, and exhibits similar hut radiating striae. 
The iufraclavicle is a large triangular hone, elongated an tero -posteriorly, and 
partly seen beneath the posterior portion of the mandible; a longitudinal 
ridge traverses its superior portion, and from this below there radiate 
numerous coarse rugae. 
The pectoral tins are best shown in No, h (PI, IV, Pig, 2), where one 
is of triangular form, and seems to he nearly complete, though comprising 
only about twenty rays. Of the “ pelvic” bones there is no trace in any 
specimen ; hut the pelvic fins are well preserved in Nos, h (PI, IV, Pig, 2) 
and c, and they were evidently of considerable size, though still somewhat 
smaller than the pectorals. Not less than thirty rays can he counted in one 
of these tins in No, c. 
The median fins are all acuminate, and consist of numerous, closely 
apjiosed rays. Though apparently complete in the type-specimen (PI, IV, 
Pig, I), the dorsal and anal fins were probably somewhat larger than those 
of this fossil, another (PI, IV, Pig, 2) exhibiting relatively longer rays in the 
anal, and a third (No, c) displaying a greater number of rays in both fins. 
In the type, the dorsal fin comprises about forty-five rays, and the anal not 
more than thirty-five, whereas in No, c, the corresjiondiug numbers are at 
least sixty and forty ; but in either case, the dorsal appears to he the larger 
