356 DR WHEELTON HIND ON THE LAMELLIBRANCH AND 



Dimensions. — PI. II. fig. 57. Specimen No. Tl756 B measures: height, 16 mm.; 

 transversely, 16 mm. 



Observations. — Portlock states that he described his species from a single example, 

 which he stated was obtained from Shale in Tyrone. De Koninck referred several 

 specimens from the Carboniferous Limestone of Vise" to this species, and gave numerous 

 figures. I am able to detect no specific difference between the descriptions and figures 

 of Bellero'phon carbonarius, Cox, from the Coal Measures of Nebraska, and the Scotch 

 examples, and have come to the conclusion that both should be referred to Poktlock's 

 species. 



Euphemus, sp. 



Two poor specimens, with a finely reticulate ornament, were obtained at Torwood 

 Glen, Stirlingshire. I don't think that they belong to any described species, but the 

 shells are much too imperfect to serve as types for a new species. Nos. Tl776 B , Tl799 B . 



Belleroplion Marcouianus, Geinitz, 1866. (PI. II. fig. 56.) 



Bellerophon Marcouianus, Geinitz, 1866, Garb, und D;/as in Nebraska, p. 7, Tab. i. fig. 12. 



,, ,, Meek and Hayden, 1872, Fin. Rep. U.S. Geol. Surv. Nebraska, p. 226, 



pi. xi. fig. 13, a, b. 



Observations. — A single species from Torwood Glen must, I think, be referred to the 

 species figured by Conrad from the Lower Coal Measures of Western Virginia. Meek 

 figures a fragment only, but this shows the characteristic keel. The Scotch specimen is 

 very badly preserved : the strong median imbricated ridge is well seen, but the rest of 

 the shell, though not crushed, is so encrusted by mineral matter that the surface of the 

 valve is not to be made out. I know no figured shell except the North American species 

 which has such a strongly marked and peculiarly ornamented median ridge. m 



