Notices of Memoirs — Dr. Winkler on Ccelacanthus. 31 



can the main results arrived at by foreign geologists. I have found a 

 wonderful unanimity in these results — geologists working apart and 

 in widely-separated countries coming as near as may be to the same 

 conclusions. 



(To be continued in our February number.) 



:n"Otic:bs oip dvcedvcoii^s. 



I. — Memoike sur le Ccelacanthus Haklemensis, par Dr. 

 T. C. Winkler. Haarlem, 1871. 8vo. 



THIS is one of several memoirs by Dr. Winkler, descriptive of 

 new, rare, or of more perfect examples of previously-described 

 vertebrate fossils, preserved in the Teyler collection at Haarlem, and 

 which originally appeared in the third volume of its Archives. It 

 is an addition to the literature of the small but interesting group of 

 fossil fishes which constitute the family of Ccelacanthini, as esta- 

 blished by Prof. Huxley in his " Preliminary Essay on the Systematic 

 Arrangement of the Fishes of the Devonian Epoch," ^ the genera and 

 species being more fully described and illustrated in a subsequent 

 Memoir.- 



Since the publication of this essay, Professors Wagner, von Alberti, 

 Kner, and Quenstedt, have each written and added to our knowledge 

 of the subject. And, more recently, M. Willemoes-Suhm has pub- 

 lished an excellent memoir on the species of Ccelacanthus in the 

 17th volume of the " Palgeontographica," 1869. The group is an 

 exceedingly interesting one to the palee-ichthyologist, both as regards 

 its peculiar anatomical structure and its long persistence in geological 

 time ; its range extending from the Upper Carboniferous beds to the 

 Chalk inclusive. And during this long lapse of time it has (so 

 far as our knowledge extends) only been represented by about 20 

 species. 



The typical genus of the family — Ccelacanthus of Agassiz — first 

 appears in the Coal-measures, and is found in the Permian and 

 Triassic formations, and also in the Upper Oolite or Lithographic 

 stone of Bavaria. Molophagus of Egerton occurs in the Lower Lias 

 at Lyme Eegis, and is known only by a single species.^ 



Macropoma, Agass., is represented by three species, one in the 

 Kimmeridge clay, and two in the Cretaceous deposits ; and, accord- 

 ing to Sir Philip Egerton, an undescribed species occurs in the 

 Purbeck beds near Swanage. Thus, of the twenty recorded sj)ecies, 

 sixteen are referred to Ccelacanthus and Undina; but this last name has 

 been set aside, as a synonym of the first, by later writers, which our 

 author greatly regrets, seeing that Count Miinster was the first to 

 observe and describe the principal characters of the peculiar organi- 

 zation of these Fishes, and that his genus Undina had the priority 

 of Agassiz's Ccelacanthus. 



^ Memoirs of the Geological Survey. Decade X. 



2 Illustrations of the Structure of the Crossopterygian Ganoids. Memoirs of the 

 Geological Survey. Decade XII. 1866. 



3 Memoii's of the Geological Survey. Decade XII. PI. 6. 



