Figures and Descriptions Illustrative of British Organic Remains. Decade[s] I[xiii] Volume 7-12; Pub. by Order of the Lords Commissioners of Her Majesty's Treasury (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1853 Excerpt: ...similar to that which obtains in Glyptoleemus, are traceable. There Fw. 8. Restoration of Osteolepis (after Pander). See " The Old Red Sandstone," PI. iv. fig. 1, Osteolepis major. It appears from this figure that even the location of the pectoral fin had not escaped Hugh Miller, though he does not particularly refer t- it in the text. Before Professor Pander's work appeared in this country, I had obtained from Caithness, by the well-directed activity of Mr. Peach, and placed in the Museum of Practical Geology, a series of specimens illustrating all the chief structural characters of Osteolepis as detailed above. The lobate pectorals of Osteolepis and Diplopterus are exhibited very well by specimens in the Hunterian and British Museum; the fact that " small ganoid scales are continued upon " the bases of the pectorals being noted in the description of No. 567 in the Catalogue of the former Museum. are no lateral jugular plates, but the principal jugular plates are separated, anteriorly, by an azygos rhomboidal plate. The family of the Saurodipterini, characterized by its two dorsals; less acutely lobate paired fins; jugular plates and no branchiostegal rays; smooth scales and cranial bones (among which last are three distinct occipital plates, while the other cranial bones have more or less coalesced), is thus very distinet from, though allied to, that of the Glyptodipterini. It comprises not only the genera Osteosis, Diplopterus, and Triploptevus (?), but also, as I believe, a genus which has a later range in time than these, viz., the Megalichthys of the Coal, although the want of acquaintance with the fins of this genus renders my conclusions as to its affinities less secure than I could wish Agassiz does indeed affirm that Megal...