n 



:? 1 A -muhir specimen, ith the nntcrior of the two dermal spines broken away. 



J/uH/eria*. 



272. An intcrncural spine of the same species, with a considerably expanded 

 summit. Ilunterian. 



273. A similar specimen. If ** tenon. 



274. A similar specimen. Jinn/ma*. 



275. A similar specimen. Huitttria*. 



276. An interneural spine supporting two dcrmoneural spines by the usual linked 

 articulation : the summit of the interneural spine is much expanded, but it 

 differs from the preceding specimens by having a ridge posteriorly instead of 

 groove. Both of the spines, which are short and thick, are grooved along 

 their anterior border. Prt*e*ted by Sir Ecerard Home, Bart., F.R.S. 



277. The cranium and six anterior vertebra? of the trunk of a Light-horseman fish 



(Ephipptui). The midfrontal bone and supcroccipital spine arc remarkable for 

 their thickness. The neural arch of the atlas is almost excluded from the Ixxly 

 by the approximation of that of the axis to the cxoccipitals. Hunter ian. 



278. The cranium of a large Ephipptu. In this, as in the preceding specimen, may 



be noticed the three concave articular surfaces formed respectively by the 

 postfrontal, mastoid, and parocripital bones, for the attachment of the tym- 

 pano-mandibular, hyoidean and scapular arches, which surfaces and connections 

 illustrate the parapophysial character of those bones. The palato-maxillary 

 arch is directly gus]>ended from the prefrontal, which is the neurapophysis of 

 the anterior vertebra of the skull. I lu nit-nan. 



279. The partially disarticulated bones of the cranium with the larger otolitcs of an 



Ephippm. They are numbered conformably with Table I. Ilunlerian. 



280. A cranium of the Light-horseman fish (Epkipptri), transversely bisected through 

 the middle of the cranial cavity. Presented by George Bennett, Etq., F.L.S. 



