﻿JURASSIC AND TRIASSIC BRACHIOPODA. 



75 



in external shape to the shell under description that it is difficult to say exactly in what 

 they differ. In 1841 ('Proc. Zool. Soc.,' p. 100) Mr. L. Reeve gave the name ovalis 

 to a recent Lingula, whose habitat is the Sandwich Islands. It will be necessary 

 to apply another name to the recent species, which is very remarkable on account of 

 its oval shape and the brilliancy of its verdigris blue-green colour. 



2. Lingula Craned, Dav. Sup., PI. IX, figs. 21, 22. 



Lingula sp., Dav. Ool. Mori., p. 98, 1852. 



Shell small, longitudinally oval, lanceolate ; sides convex, merging either into a 

 sharply acuminated, or obtusely angular beak ; front rounded ; surface much flattened, 

 and marked with concentric lines of growth. 



Length 3, width slightly under 2 lines. 



06s. This species varies a good deal, some specimens being broadest posteriorly, 

 while others are more lanceolate. It does not, however, appear to have much exceeded 

 the dimensions above given. 



L. Cranece occurs in the Oxford Clay of Christian Malford, as well as in the same 

 formation near Chippenham ; and at Caledonian Mills, one mile south-east of Newport ; 

 good examples may be seen in the British Museum, and in the collection of the School of 

 Mines, in London. I have much pleasure in naming it after Miss Agnes Crane, a talented 

 young geologist. 



3. Lingula longo-viciensis, Ter quern. Dav., Sup., PI. IX, figs. 24, 25, 26. 



Lingula longo-viciensis, Terquem. Bull. Soc. Geol. de France, 2nd ser., vol. viii, 



p. 12, 1850 (no figure given). 



— — Chapuis et Dewalque. Desc. des foss. des Terrains Secon- 



dares de la Province du Luxem- 

 bourg, pi. xxxv, fig. 4, 1855. 



— venusta, Simpson. Fossils of the Yorkshire Lias, p. 130, 1855. 



— longo-viciensis, Oppel. Die Jura-Formation, p. 2(56, 1856. 



— — R.Tate. Geol. Mag., vol. vi, p, 556, 1869. 



Shell small, oblong-oval, sides convex, anteriorly broadly rounded, posteriorly tapering 

 into an angular beak, valves thin, slightly convex, and marked with numerous strong 

 concentric lines of growth. 



Length 4 lines, by 2 in width. 



la formation jurassique des environs de Boulogne-sur-Mer, 1875,' and states the species to be from the upper 

 beds of his " Etage Virgulien " of Chatillon. 



