LAMELILIBRANCHIATA. 69 
Anodontopsis quadrata, F. McCoy, A. M. N. H. ser. 2, vil 
(1851), p. 55, and Contrib. Brit. Pal. (1854), p. 190, and Brit. 
Paleeoz. Foss. (1852), pl. ik, f. 10, p. 272. Palearca diagona, 
Salter, Cat. (1873), p. 190. Upper Ludlow Tilestones ; Storm 
Hill, Llandeilo. 
A. securiformis, F. McCoy, A. M. N. H. ser. 2, vit (1851), p. 55, 
and Contrib. Brit. Pal. (1854), p. 190, and Brit. Paleeoz. Foss. 
(1852), pl. i L, f. 9, 9 a, p. 272. Pseudauxinus securiformis, 
Salter, Cat. (1873), p. 183. Upper Ludlow; Benson Knot, 
Kendal. 
Anomia papyracea, dOrbigny, var. burwellensis, R. Ethe- 
ridge, Appendix to W. H. Penning and A. J. Jukes-Browne, 
Geol. Cambridge (1881), pl. i. f. 3, 4, p. 145. Lower Chalk 
(Totternhoe Stone); Burwell. 
Arca carteroni, dOrbigny, W. Keeping, Foss. Upware and 
Brickhill (1883), pl. v, f 7 a, b, p. 114. Lower Greensand ; 
Upware. 
A. edmondiiformis, F. McCoy, A. M. N. H. ser. 2, vit (1851), 
p. 52, and Contrib. Brit. Pal. (1854), p. 187, and Brit. Palseoz. 
Foss. (1852), pl. 1, f. 2, 3, p. 288. Fig. 2 from Denbigh Flags, 
near Llangynyw ; fig. 3 from the Middle Bala, Allt-yr-Gader. 
A. laekeniana, Le Hon, var. cylindrica, 8. V. Wood, Eoc. 
Bivalves 1 (1864), pl. xv, f. 7 ¢, p. 80. Bracklesham Beds ; 
Huntingbridge. Fisher Collection. This specimen is missing. 
A. (Byssoarca) subequalis, Ff. McCoy, A. M. N. H. ser. 2, vit 
(1851), p. 51, and Contrib. Brit. Pal. (1854), p. 186, and Brit. 
Palzeoz. Foss. (1852), pl. i k, f. 1, 1 a, p. 283. Ctenodonta 
subeequalis, Salter, Cat. (1873), p. 190. Upper Ludlow ; Llech- 
clawdd, Myddfai, near Llandovery. 
A.? sulcata v. Inoceramus sulcatus. 
Astarte aytonensis [Bean MS8.], J. Lycett, Supp. Mon. Moll. 
Great Ool. etc. (1863), pl. xl, f. 13, p. 78. Great Oolite ; Combe 
Down, near Bath. Walton Collection. 
Another specimen, J. F. Blake and W. H. Hudleston, Q. J. 
G. S. xxxim (1877), pl. xiv, f. 11, p. 397. Corallne Oolite ; 
Ayton, near Scarborough. Leckenby Collection. 
A. bathonica, J. Lycett, Supp. Mon. Moll. Gt. Ool. etc. (1863), 
