158 CARBONIFEROUS LAMELLIBRANOHTATA. 



Solenopsis, M'Coy, 1844. Syn. Carb. Limest. Foss. Ireland, p. 47. 



— W. H. Baily, 1862. Explan. Sheet 127, Mem. Geol. Surv. Irel., p. 9. 

 Clidophorus, H. B. Geinitz, I860. Carbonformat ion u. Dyas in Nebraska, p. 25. 

 Solbnoprts, F. V. Hayden, 1871. Final Report of U.S. Geol. Surv. in Nebraska, 



p. 223. 



— L. G. de Koninck, 1885. Ann. Mus. Roy. Hist. Nat. Belg., vol. xi, 



p. 88. 



— Fischer, 1887. Manuel de Conchyliologie, p. 1112. 



— 8. A. Miller, 1889. North American Geology and Palaeontology, 



p. 512. 

 Beushansen, 1895. Abhandl. Konigl. Preuss. Geol. Landesanst., n. s. 

 pt. xvii, p. 216. 



— Hind, 1900. Monogr. Brit. Carb. Lamell., pt. v, p. 412 (Pal. Soc, 



vol. liv). 

 Solenomoepha, Hind, 1903. Quart. Journ. Geol. Soc., vol. lix, p. 334. 



Observations.— In ' Nature,' vol. lxvii (1903), p. 559, Prof. T. D. A. Cockerell 

 points out that the name Solenopsis was adopted in 1841 for a genus of ants, and 

 therefore must not be used for a genus of Mollusca ; he suggests Solenomorpha. 

 It is curious that the name has not been challenged since 1844. 



Solenomorpha major, Hind, 1903. Plate XXII, figs. 1, 2. 



Solenomorpha major, Hind, 1903. Quart. Journ. Geol. Soc, vol. lix, p. 334, fig. 1. 



Specific Characters. — Shell above medium size, transversely elongate, ovato- 

 lanceolate-truncate, very inequilateral, broad and convex in front, narrowed and 

 compressed posteriorly, only slightly convex from before backward, more so from 

 above downward. The anterior border is rounded, the inferior border prolonged 

 and elliptically curved, the posterior short, bluntly obliquely truncate. The hinge- 

 line is curved in front, long, and almost straight posteriorly. The umbones are 

 obtuse, and placed in the anterior fifth of the valve. There seems to have been an 

 elongate, narrow escutcheon. 



Interior. — The anterior adductor scar is large and rounded. Other characters 

 and the hinge unknown. 



Exterior. — The shell is ornamented with fine, close, concentric lines of growth, 

 which follow the contour of the valve. 



Dimensions. — Plate XXII, fig. 1, measures — 



Antero-posteriorly . . . .136 mm. 



Dorso-ventrally . . . .42 mm. 



G-ibbosity of valve . . . .5 mm. 



Horizon "ml Locality. — Shales of the Pendleside Series, River Hodder, Hodder 



