1848.] BRODIE ON A FOSSIL DRAGON-FLY. 35 



the anal margin of the hind-wing are only three rows of cells in con- 

 sequence of this part of the wing being comparatively so very narrow. 



*' As these tedious details can only be understood by figures, I have 

 given enlarged outlines of the wings of the three species above de- 

 scribed. See PL ii. figs. A*, Af, B and C." 



The head unfortunately is so shattered that it does not furnish any 

 distinctive characters, and hence, from the want of the more charac- 

 teristic organs, it will be difficult to determine whether it strictly be- 

 longs to any of the numerous subgenera lately separated from Libel- 

 lula by Rambun and Leach. As the extreme segments are not visible, 

 it is impossible to discover the length of the abdomen or the form of 

 the anal appendages. The specimen appears to be a female. The 

 eyes are not seen, but the basal joints of one of the antennae may be 

 observed attached to the head. One leg is very perfect, even display- 

 ing the claws. Although this fossil appears to approach nearest to 

 the genus Diplax, Mr. Westwood considers that it will be better to 

 adopt Libellula as the generic title : while the peculiar veining of the 

 wings will form the ground for a provisional subgeneric one, which 

 he names Heterophlebia. Hence I propose, provisionally, to name 

 it Libellula (Linn.) Heterophlebia dislocata (Brodie)*, 

 PL ii. 



According to Mr. "Westwood, the wing figured in my work on 

 * Fossil Insects,' pi. 8. fig. 2, is not an Agrion as there supposed, 

 but belongs to the same species as the one above described. He is 

 also of opinion that fig. 8. pi. 10. is the base of the fore-wing of an 

 allied species of gigantic size, measuring as much as seven inches in 

 expanse. Fig. 4. pi. 8. may also probably belong to the same. 



A few sepise, small Crustacea and shells accompany these remains 

 of insects, and imperfect specimens of Leptolepis are abundant, but 

 they are rarely met with entire. Sir Philip Egerton has been good 

 enough to favour me with the following description of this fish : — 



"Leptolepis concentricus, Egerton. 

 *'This distinct and well-marked species of Leptolepis was discovered 

 by the Rev. P. B. Brodief in the beds of the upper lias at Dumble- 

 ton in the county of Gloucester. The first specimens forwarded for 

 examination contained a few scales, which, from their circular form 

 and concentric ornament, were considered by some to have belonged 

 to a fish of the Cycloid order ; an error in which the zealous disco- 

 verer did not participate, as he attributed them to the proper genus. 

 On comparing them with the scales of these fishes already known, it 

 appeared impossible to refer them to any species hitherto described ; 

 I therefore proposed the specific designation concentricus (which Mr. 

 Brodie has adopted) in reference to their most prominent character. 

 This term is not altogether appropriate, for the scales of all the spe- 



* Mr. Ingpen, Vice-President of the Entomological Society, has kindly given 

 me several useful hints in the latter part of the description of this beautiful fossil. 



t My friend the Rev. C. Murley was the first person who noticed the remains 

 of fishes in the upper lias at Dumbleton, and he drew my attention to them some 

 vears ago. — P. B. B. 



D 2 



