90 LAMELLIBRANCHIATA. 



Pterinaea retroflexa (Wahlenberg) var. a, F. McCoy, Brit. 

 Palseoz. Foss. (1852), p. 262. Aymestry Limestone; Leint- 

 wardine. 



P. retroflexa (Wahlenberg) var., (cf. Avicula erecta, Conrad), F. 

 McCoy, Brit. Palseoz. Foss. (1852), p. 262. Upper Ludlow ; 

 Laverock Lane, Kendal. 



P. retroflexa (Wahlenberg) var., (with coarse imbrications), 

 Salter, Cat. (1873), p. 150. Wenlock Limestone; Dudley. 

 Fletcher Collection. 



P. sowerbyi, F. McCoy, Brit. Palseoz. Foss. (1852), p. 263. 

 Aymestry Limestone; Leintwardine. 



P. subfalcata (Conrad), F. McCoy, Brit. Palaeoz. Foss. (1852), 

 pi. i i, f. 3, 3 a, p. 263. Goniston Grit; Howgill Fell, near 

 Sedbergh. 



P. subradiata (Sowerby). Avicula subradiata, J. de C. Sowerby. 

 Trans. Geol. Soc. ser. 2, v (1840), pi. liv, f. 1. Upper Devonian; 

 South Petherwin. 



P. tenuistriata, F. McCoy, A. M. N. H. ser. 2, vn (1851), p. 62, 

 and Contrib. Brit. Pal. (1854), p. 197, and Brit. Pakeoz. Foss. 

 (1852), pi. i i, f. 4, 4 a, p. 263. Upper Ludlow; Benson Knot, 

 Kendal. 



P. sp., (cf. lineatula), Salter, Cat. (1873), p. 150. Wenlock Shale 

 (or Lower Ludlow); Dudley. Fletcher Collection. 



Pteronites persulcatus, F. McCoy, A. M. N. H. ser. 2, vn (1851), 

 p. 170, and Contrib. Brit. Pal. (1854), p. 202, and Brit. Pala?oz. 

 Foss. (1855), pi. iii F, f. 1, p. 480. Carboniferous Limestone; 

 Lowick. 



Pteroperna plana, J. Morris and J. Lycett, Mollusca Gt. Ool. 

 part ii (1853), pi. xiv, f. 4, p. 128. Inferior Oolite (Grey Lime- 

 stone) ; Cloughton, near Scarborough. Leckenby Collection. 



Pullastra antiqua, v. Nucula pullastriformis. 



Quenstedtia laevigata (Phillips), J. Morris and J. Lycett, 



Mollusca Gt. Ool. part ii (1853), pi. xiv, f. 13, p. 135. Grey 



Limestone; Cloughton Wyke, near Scarborough. Leckenby 

 Collection. 



