454 PETRIFACTIONS AND THEIR TEACHINGS. CHAP. V. 



Leuciscus. (L. Hartmanni, from Steinheim ; L. papyraceus, from the 

 paper-coal of the Rhine.) 



Clupea. (C. Scheuchzeri, from the slate of Glaris.) 



Cobitis. (C. longiceps.) 



Acrognathus. (A. boops, chalk, Lewes, ante, p. 446.) 



Aulolepis. (A. typus, from the chalk, Lewes, ante, p. 447.) 



Lebias. (L. cephalotes.) 



Osmeroides. (0. Lewesiensis, and 0. Mantelli, from Lewes.) 



Tomognathus. (From the Sussex chalk.) 



Anguilla. (A. brevicula, A. pachyura, from (Eningen.) 



Ampheristus. (A. toliapicus, London clay, Sheppey.) 



Ehodeus. (R. elongatus.) 



Acanthopsis. (A. angustus.) 



Mallotus. (M. villosus. The Angmarset, from the West Coast of Green- 

 land.) 



Remains of Fishes of the PLACOID ORDER, viz. Teeth, Rays, Spines, 

 Scales, &c. of Chimseroids, Squalidse or Sharks, Hybodons, Cestra- 

 cions, Pristides or Saw-fishes, and Rays. These are, for the most 

 part, in the Table-Cases, 2, 4, 6, 8, 10, of the Plan of Room Y. 

 ante, p. 410. 



CHIMJBROIDS: Ischyodus, Edaphodon, Ceratodus. 



SQUALID^:: Carcharodon, Lamna, Otodus, Notidanus, Hybodus, Cla- 



dodus. 

 CESTRACIONS : Strophodus, Acrodus, Orodus, Ptychodus, Psammodus, 



Ctenodus, Ctenoptychius, Cochliodus. 

 ICHTHYODORULITES. Rays or spines of fins, dorsal or pectoral, belonging 



to Cestracions, Chimseroids, and other genera of the Shark family : 



Spinacanthus, Oracanthus, Ctenacanthus, Asteracanthus, Nemacan- 



thus, Gyracanthus, Leptacanthus, Ptychacanthus. 

 PRISTIDES, or Saw-fish : Pristis. 

 RATS: JEtobatis, Miliobates. 1 



* ** To MR. DA VIES, the intelligent Assistant, who has charge of this 

 collection, I am much indebted for his obliging attention during my 

 examination of its contents. 



1 A list of the principal British localities of Fossil Fishes is given in " The Medals 

 of Creation," p. 679. 



