﻿544 ACT1N0PTEKYG11. 



in the relative proportions of the head between the Kupferschiefer 

 fossils and those named striates from the English Marl Slate ; and 

 in all these fishes the scale-ornament is identical. The rounded 

 form of the dorsal and ventral margins in the so-called P. rhombus 

 is due to accident in preservation, the median fins being almost or 

 completely destroyed in fishes exhibiting this contour. 



Form. 4' Loc. Upper Permian (Kupferschiefer) : Germany. Upper 

 Permian (Lower Magnesian Limestone and Marl Slate) : Durham 

 and Northumberland. 



(i.) Kupferschiefer. 



44864. Fish of moderate size, in counterpart, wanting the ventral 

 border of the abdominal region and the greater part of 

 the dorsal and anal fins : Mansfeld, Thuringia. Parts of 

 the endoskeleton of the trunk are well shown, the distal 

 series of short baseosts in the anal fin being conspicuous, 

 and the proximal series of dorsal fin-supports (axonosts) 

 extending forwards as far as the occiput. 



Presented by Benjamin Bright, Esq., 1873. 



35530. Small fish, 0*145 in length, nearly complete, but wanting 

 the pelvic fins • Eiechelsdorf, Hesse. Purchased, 1859. 



43431. Imperfect small specimen, wanting the lower jaw and fins ; 

 Eiechelsdorf. The form of the cranium, lateral aspect, 

 is well shown, and there is a series of styliform teeth in 

 the upper jaw. 



Presented by Kenneth Murchison, Esq., 1872. 



43430. More imperfect larger specimen ; Eiechelsdorf. 



Presented by Kenneth Murchison, Esq., 1872. 



P. 1601. Tine small specimen, about 0-095 in length ; Eiechelsdorf. 



Egerton Coll. 



P. 1599. Head and trunk, 0-16 in length, wanting caudal lobe and 

 fin ; Eiechelsdorf. Egerton Coll. 



P. 3496-7. Four imperfect specimens, one displaying the pectoral, 

 pelvic, and dorsal fins, and another exhibiting one of the 

 pectoral fins ; Eiechelsdorf. Ennislcillen Coll. 



18513. Large specimen displaying portions of the scale-ornament 

 in impression ; Eisleben, Saxony. Purchased, 1844. 



28279. Large head and trunk, showing parts of the endoskeleton 

 of the trunk, and the pelvic, dorsal, and anal fins; 

 Eisleben. Purchased, 1853. 



