Te LAMELLIBRANCHIATA. 
Aviculopecten concavus (McCoy), F. McCoy, Brit. Palzeoz. 
Foss. (1855), pl. 11 E, f. 2, 2 a, p. 484. Carboniferous Lime- 
stone; Lowick. Presented by W. Hopkins, Esq. 
A. docens, F. McCoy, Brit. Paleoz. Foss. (1855), pl. iii E, f. 6, 7, 
p. 485. Carboniferous Limestone; f. 6 from Lowick, f. 7 from 
Derbyshire. Presented by the Rev. J. J. Jenkinson. 
A. pectinoides (Sowerby). Avicula pectinoides, J. de C. Sowerby, 
Trans. Geol. Soc. ser. 2, v (1840), pl. liv, £2. Upper Devonian ; 
Petherwin. 
A. planoradiatus, F. McCoy, A. M. N. H. ser. 2, vit (1851), 
p- 171, and Contrib. Brit. Pal. (1854), p. 204, and Brit. Palzoz. 
Foss. (1855), pl. 11 E, f. 8, p. 489. Carboniferous Limestone ; 
Derbyshire. Presented by W. Hopkins, Esq. 
A. ruthveni, F. McCoy, A. M. N. H. ser. 2, vit (1851), p. 172, and 
Contrib. Brit. Pal. (1854), p. 204, and Brit. Palszoz. Foss. 
(1855), pl. i 5, f. 4, p. 489. Carboniferous Limestone ; Dent. 
Presented by the Rev. J. J. Jenkinson. 
A. segregatus (McCoy), F. McCoy, Brit. Paleoz. Foss. (1855), 
pl. i £, f. 1, p. 489. Carboniferous Limestone ; Lowick. 
Axinza proxima (Wood). Pectunculus prozimus, 8S. V. Wood, 
Eoc. Bivalves 1 (1864), pl. xvu, f. 11, p. 99. Bracklesham 
Beds ; Huntingbridge. Fisher Collection. 
Cardiomorpha orbicularis, F. McCoy, A. M. N. H. ser. 2, xm 
(1853), p. 189, and Contrib. Brit. Pal. (1854), p. 257, and Brit. 
Palaeoz. Foss. (1855), pl. 1 1, f. 41, 41 a, p. 510. Carboniferous 
Limestone; Derbyshire. Presented by the Rev. J. J. Jenkinson. 
Cardita rotundata?’, Pictet and Roux, W. Keeping, Foss. 
Upware and Brickhill (1883), pl. vi, f. 7, p. 121. Lower 
Greensand ; Upware. 
Cardium buckmani, J. Lycett, Supp. Mon. Moll. Gt. Ool. ete. 
(1863), pl. xl, f 18, 18 a. Forest Marble; Laycock, Wilts. 
Walton Collection. 
C. cognatum, Phillips, J. Leckenby, Q. J. G. S. xv (1859), pl. iii, 
f.8.a,b. Kellaways Rock; Scarborough. Leckenby Collection. 
Another specimen, J. Lycett, Supp. Mon. Moll. Gt. Ool. ete. 
(1863), pl. xxxvi, f. 3, p. 54. Cornbrash ; Scarborough. Leck- 
enby Collection. 
