We pursue our history no further. Its after course is comparatively well known. The huge sauroid fish was succeeded by the equally huge reptile--the reptile by the bird--the bird by the marsupial quadruped; and at length, after races higher in the scale of instinct had taken precedence in succession, the one of the other, the sagacious elephant appeared, as the lord of that latest creation which immediately preceded our own. How natural does the thought seem which suggested itself to the profound mind of Cuvier, when indulging in a similar review! Has the last scene in the series arisen, or has Deity expended his infinitude of resource, and reached the ultimate stage of progression at which perfection can arrive? The philosopher hesitated, and then decided in the negative, for he was too intimately acquainted with the works of the Omnipotent Creator to think of limiting his power; and he could, therefore, anticipate a coming period in which man would have to resign his post of honor to some nobler and wiser creature--the monarch of a better and happier world. How well it is, to be permitted to indulge in the expansion of Cuvier's thought, without sharing in the melancholy of Cuvier's feeling--to be enabled to look forward to the coming of a new heaven and a new earth, not in terror, but in hope--to be encouraged to believe in the system of unending progression, but to entertain no fear of the degradation or deposition of man! The adorable Monarch of the future, with all its unsummed perfection, has already passed into the heavens, flesh of our flesh, and bone of our bone, and Enoch and Elias are there with him--fit representatives of that dominant race, which no other race shall ever supplant or succeed, and to whose onward and upward march the deep echoes of eternity shall never cease to respond. ICHTHYOLITES OF THE OLD RED SANDSTONE. FROM AGASSIZ'S "POISSONS FOSSILES." ∵ The synonymes here--now supplanted, however--with the names of a few doubtful or fictitious species, are given in _Italics_;--the former opposite the names ultimately adopted, the latter immediately under the names of the determined species. Acanthodes pusillus. Actinolepis tuberculatus. Asterolepis Asmusii.--Syn. _Chelonichthys Asmusii_. " apicalis. " granulata. " Hœninghausii. " Malcolmsoni. " minor.--Syn. _Chelonichthys minor_. " ornata. " speciosa. " _concatenatus_. " _depressus_. Bothriolepis favosa.--Syn. _Glyptosteus favosus_. " ornata " " _reticulatus_ Byssacanthus arcuatus. " crenulatus. " lævis. Cephalaspis Lewisii. " Lloydii. " Lyellii. " rostratus.