90 LAMELLIBRANCHIATA. 



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

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

 wardine. 



P. retroflexa (Wahlenberg) var., {cf. Avicula erccta, 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. Paljeoz. Foss. (1852), p. 263. 

 Aymestry Limestone; Leintwardine. 



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

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

 Sedhergh. 



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

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

 South Pethei-win. 



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

 and Contrib. Brit. Pal. (1854), p. 197, and Brit. Pateoz. 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 Slmle 

 {or Lower Ludloiu); Dudley. Fletcher Collection. 



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

 p. 170, and Contrib. Brit. Pal. (1854), p. 202, and Brit. Paljeoz. 

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

 Lowick. 



Pteroperna plana, J. Morris and J. Lycett, MoUusca 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. Monis and J. Lycett, 



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



Limestone; Cloughton Wyke, near Scarborough. Leckenby 

 Collection. 



