. College collection of palaeontology. No. 197. [484, Cast]. Ammonites cordatus, Sow. Internal cast of the adult shell showing the foliations. This species varies in size, among adult individuals, from one to eight inches in diameter. From the Oxford Clay (Middle Oolite), Cal- vados, France, and now in the Ward Collection, University of Rochester. Diameter, 7. No. 198. [486, Cast]. Ammonites coronatus, Brug. This species from the Middle Oolite, very much resembles A. gigas, Ziet, of the Upper Oolite. It is the type of Von Buch's group "; From Villere, France, and now in the
. College collection of palaeontology. No. 197. [484, Cast]. Ammonites cordatus, Sow. Internal cast of the adult shell showing the foliations. This species varies in size, among adult individuals, from one to eight inches in diameter. From the Oxford Clay (Middle Oolite), Cal- vados, France, and now in the Ward Collection, University of Rochester. Diameter, 7. No. 198. [486, Cast]. Ammonites coronatus, Brug. This species from the Middle Oolite, very much resembles A. gigas, Ziet, of the Upper Oolite. It is the type of Von Buch's group "; From Villere, France, and now in the Ward Collection, University of Rochester. No. 199. [488, Cast]. Ammonites cornucopise, d'Orb. This elegant Ammonite very closely resembles A. fimbriatus, Sow., but is considered by d'Orbigny a distinct species. Its several whorls are coiled quite loosely, and taper very rapidly towards the center of the shell. From the Upper Lias, Verpilliere, France, and now in the Ward Collection, University of Rochester. Diameter, 12. No. 200. Ammonites communis, Sow. This species is very frequently found forming the central nucleus of discoid concretions of slaty limestone. These concretions owe their origin to the attracting and cementing power of the decomposing mollusk. From the Upper Lias, Whitby, England. No. 201. [490, Cast]. Ammonites fimbriatus. Sow. This species is characteristic of the group "; The specimen shows the orna- mental characters of the external shell. The lines of periodical enlargement or growth are very marked on this shell. From the Middle Lias, Charmouth, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward's Natural Science Establishment, inc. Rochester
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