PLATE XXVII. 



(The cost of this plate has been defrayed by the Carnegie Trust for the Universities 



of Scotland.) 



Fig. 



1. Imperfect anterior median dorsal plate of Bothrlolepis obesa, from the neigh- 



bourhood of Jedburgh. The bony matter has extensively flaked off, so that 

 only feeble traces of the external sculpture remain. 



2. Anterior median dorsal plate, internal surface. From a plaster mould of an 



impression from Rule Water, near Jedburgh. Collection of Geological 

 Survey of Scotland. 



3. Fragment of an anterior median dorsal plate, outer surface showing sculpture. 



From a plaster mould of an impression from Harelaw, Chirnside, Berwick- 

 shire. Hugh Miller Collection. 



4. Left posterior dorso-lateral plate, showing external sculpture and the arese 



overlapped by the anterior dorso-lateral, the posterior ventro-lateral, and 

 the posterior median dorsal ; a considerable portion of the plate is 

 unfortunately deficient at the anterior superior (or internal) angle. From 

 a plaster mould taken from an impression from Harelaw, Chirnside, 

 Berwickshire. Hugh Miller Collection. 



5. Fragment of the proximal segment of a pectoral appendage placed horizonally, 



showing portion of the articular, internal marginal, and external marginal 

 plates, seen from their internal surfaces. Note the stout denticulations on 

 the outer aspect of the external marginal. From Harelaw, Chirnside, in 

 the Hugh Miller Collection. 



6. Part of the median occipital and post-median plates showing external sculpture. 



From a plaster mould taken from an impression from Harelaw, Chirnside, 

 in the Hugh Miller Collection. 



All these figures are two thirds natural size, and with the exception of that of 

 Fig. 2, all the originals are in the collection of the Royal Scottish Museum. 



