Reports and Proceedings — Geological Society of London. 87 



plan. The ribs are short with both ends expanded. The fourth 

 species is Linmerpefon elegans (Fritsch). It has small oval scutes 

 marked with cancellate marking which is partly concentric, partly 

 diagonal. The remains are scattered. The skull-bones are com- 

 paratively smooth. They indicate a longer and smaller skull than 

 that of the last species. The maxillary bone contains 23 teeth and 

 may have included 35 teeth. The teeth are less regular in size than 

 in other species of this genus. The shield of the parasphenoid bone 

 is thickly toothed. The fifth species is Limnerpeton obtusatum 

 (Fritsch). The scutes on the abdomen are of moderate size orna- 

 mented with ribs which branch at intervals, and have a thickened 

 hinder edge. The scutes of the upper side of the body want the 

 thickened edge. 



The form of the body is greatly elongated, and the head is re- 

 markably short and wide. The body is six times as long as the 

 head, and the tail is twice as long as the head. The anterior ex- 

 tremity is much shorter than the hinder extremity. The abdominal 

 armour consists of about 100 rows of scutes ; each row contains six 

 scutes on each side of the median line. Each scute is twice as broad 

 as long. The skull is half as broad again as long. The orbits are 

 in the anterior third of the skull, and are nearly double their diameter 

 from each other. The teeth are small and smooth with pulp-cavities. 

 The nasal bone is pitted. The epiotic bone is quadrate and ends in 

 a process which is directed backward. The sclerotic circle includes 

 12 bones. The hyoid in so far as it is preserved resembles that of 

 Keraterpeton. There are about 37 presacral vertebrje, and about 

 16 in the tail, though 10 appear to be wanting. The notochord was 

 continuous. The caudal vertebras are very short and decrease 

 rapidly in height. The dorsal ribs are 2^ times as long as the 

 vertebrae, and have the capitulum and tuberculum most developed 

 towards the neck. lu the hinder extremity the phalanges are 

 remarkably short. 



Some other remains are described under the names Limnerpeton 

 diibium, known only from a lower jaw ; L. difficile, known from a 

 portion of a skull which is doubtfully referred to the genus ; and L. 

 caducum, founded upon a jaw and a rib. 



Although many species have been described, it is impossible not 

 to recognize that they are for the most part well characterized. 

 And the publication of electrotypes of these perishable specimens 

 will facilitate a comparison between some of the Bohemian species 

 and their British allies, and thus demonstrate the nature of the 

 affinity between them. H. G. Skeley. 



S/Eii^oi^TS j^isriD i^'s-ociBiEiDiisra-s. 



Geological Society of London. 



I— December 3, 1S84: [Continued).— Vrof. T. G. Bonney, D.Sc, 

 LL.D., F.R.S., President, in the Chair. The following communica- 

 tion was read : — 



3. " On the Lower Eocene Plant-beds of the Basaltic Formation 

 of Ulster." By J. Starkie Gardner, Esq., F.G.S. 



