CtLONDROSTEID^. 
31 
P. 616. Type specimen of Chondrosteus crcissior , Egerton, figured 
loc. cit. pi. lxviii., displaying vertically crushed remains of 
the head, pectoral arch, and pectoral fins. The cranial 
roof-bones and the outer face of the clavicle (“ scapulo- 
coracoid”) exhibit few coarse tuberculations, apparently 
not coated with ganoine; the pectoral fin-rays show few 
traces of nodose granulations. The clavicle has a distinct 
inferior limb, and, so far as preserved, resembles in shape 
that of Acijoenser. Egerton Coll. 
P. 2048. Head and pectoral arch, with fins, inferior aspect, de¬ 
scribed and figured by R. H. Traquair, loc. cit. p. 252, fig. 3. 
The outline-illustration is copied, of one-half the natural 
size, in the accompanying fig. 5, and an actual drawing 
of the fossil is given in PI. I. fig. 2. The only modification 
in Dr. Traquair’s interpretation occurs in the pectoral 
arch, where an accidental fracture (a?) on each side led to 
the erroneous determination of the inferior limb of the 
clavicle as infraclavicle in the original description. The 
true infraclavicle ( i.cl .) is well shown in the lithographed 
figure. Egerton Coll. 
P. 2049. Head with opercular apparatus, pectoral arch and portions 
of the pectoral fins, lateral and partly inferior aspect, 
Fig. 6. 
Head and pectoral arch of Chondrosteus acipenseroides, lateral and 
partly inferior aspect (after Traquair). [Xo. P. 2049.] 
For explanation of lettering see opposite page. 
