348 DR WHEELTON HIND ON THE LAMELLIBRANCH AND 



Edmondia Lyellii, Hind, 1899. (PL II. fig. 35.) 

 For synonymy, vide Hind, Pal. Soc, 1899, Brit. Garb. Lamell., vol. i. p. 300. 



A fragment of what I take to be the right valve of this species was obtained at 

 Torwood Glen, Stirlingshire. 



Edmondia sulcata, Phillips, sp. (PI. II. fig. 33.) 

 For synonymy, vide Hind, Pal. Soc, 1899, Brit. Garb. Lamell., p. 318. 



A single specimen of this shell has been obtained from the Millstone Grit horizon 

 at river Avon, between the Railway Viaduct and the Castlecary Limestone, Linlithgow. 

 The specimen, though crushed, is well preserved, and not to be mistaken. It is a 

 right valve, and shows in places the radiating lines of tubercles with which the posterior 

 portion of the valve was covered. Another better specimen was got on the same 

 horizon at Torwood Glen, Stirlingshire. Other examples were got at Gain Quarry, 

 Dumbartonshire. The figured example, No. Tl858 B , is from the river Avon, on west 

 side of the Railway Viaduct, 100 yards below the Mill. 



Sanguinolites occidentalis, Meek and Hayden, sp., 1858. (PL II. figs. 36-38.) 



Pleurophorus occidentalis, Meek and Hayden, 1858, Trans. Albany Instit., iv. 



„ ,, Meek and Hayden, 1864, Pal. Upper Missouri, p. 35, pi. i. fig. 11a. 



Clidophorus Pallasi, Geinitz pars., 1866, Garb, und Dyas in Nebraska, p. 23, pi. ii. fig. 3. 

 Pleurophorus occidentalis, Meek and Hayden, 1872, Fin. Rep. U.S. Geol. Surv. Nebraska, p. 212, 

 pi. x. fig. 12. 



Specific Characters. — Shell ovate, oblong, broader behind than in front, obliquely 

 gibbose. The anterior end is short, its margin rounded. The upper and lower borders 

 subparallel. The posterior margin obliquely subtruncate, junction of lower and posterior 

 borders bluntly rounded. The postero-superior angle well marked, obtuse. The 

 umbones are small, pointed, directed forwards, only very slightly raised above the 

 hinge line and placed far forwards. Passing obliquely from the umbo to the postero- 

 inferior angle is a bluntly rounded ridge which separates a broad and compressed dorsal 

 slope from the narrow and somewhat compressed body of the valve. The edge of the 

 upper margin is thickened posteriorly, and forms a ridge ; between it and the oblique 

 ridge are two well-marked oblique lines which extend to the posterior border. 

 Escutcheon well marked. 



Interior. — Normal. Hinge plate apparently edentulous. 



Exterior. — The surface is ornamented by somewhat irregular rugose but fine lines 

 of growth, which become much less obvious on the dorsal slope. 



Dimensions.— -PI. II. fig. 37. Specimen No. T2216 B , a left valve, measures: 

 antero-posteriorly, 20 mm. ; dorso-ventrally, 9 mm. 



Localities. — Linlithgow, river Avon, right bank, between Railway Viaduct and the 

 outcrop of the Castlecary Limestone; Stirlingshire, Torwood Glen, 2|- miles N.W. of 



