I 



LAMELLIBRANCHIATA. 81 



Macrodon hirsonensis (d'Archiac) var. nigosa, J. Lycett, Supp. 

 Mon. Moll. Gt. Ool. etc. (1863), pi. xxxvi, f. 9, p. 113. Forest 

 Marble; Farleigh. Walton Collection. 



Modiola arcadiformis, W. Keeping, Foss. Upware and Brickhill 

 (1883), pi. vii, f. 2 a, b, p. 128. Lmuer Greensand ; Potton. 



M. ? consobrina, S. V. Wood, Eocene Bivalves i (1864), pi. xix 

 f. 17, p. 76. BracHesham Beds; Alum Bay, Isle of Wight. 

 Fisher Collection. 



M. gibbosa, W. H. Hudleston, Proc. Geol. Ai3soc. v (1878), p. 489. 

 Coi-al Rag ; Malton. 



M. obesa, W. Keeping, Fos.s. Upware and Brickhill (1883), pi. 

 vi, f. 3 a, b, p. 117. Lower Greensand ; Upiuare. 



M. pedemalis ?, Roemer, W. Keeping, Foss. Upware and Brick- 

 hill (1883), pi. vi, f. 2 a, b, p. 117. Lower Greensand; Upware. 



M. sp., W. Keeping, Foss. Upware and Brickhill (1883), p. 118. 

 Lower Greensand ; Upware. 



Modiolopsis gradata (Salter). M. nilssoni (Hisinger), F. McCoy, 

 Brit. Palajoz. Fo.ss. (1852), pi. i i, f. 21, p. 267. Loiuer Ludlow; 

 Park Lane, Lkmdeilo. 



M. homfrayl, H. Hicks, Q. J. G. S. xxix (1873), pi. v, f. 16, 17, 



p. 49. Tremadoc Beds; Ramsey Island. Presented by Dr 

 H. Hicks. 



M. inflata, F. McCoy, A. M. N. H. ser. 2, vii (18.51), p. 58, and 

 Contrib. Brit. Pal. (1854), p. 193, and Brit. Palteoz. Foss. (1852), 

 pi. i I, f. 16, p. 266. Jfiddle Bala; Pen Cerrig, SeHh. 



M. modiolaris (Conrad), F. McCoy, Brit. Palaeoz. Foss. (1852), 

 pi. i I, f. 17, 18, p. 267. M. m'coyi, J. W. Salter, Appendix to 

 A. C. Rani.say, Geol. North Wales (1866), p. 346, and ibid. 

 second edition (1881), p. 552. Middle Bala; fig. 17 C'culer 

 Dinmael,fig. 18 Horderley. 



M. nils.mni, v. Modiolopsis gradata. 



M. planata, Salter, Cat. (1873), p. 182. Upper Ludlow; Kirkby 

 Moor, Kendal. 



M. planata, var., Salter, Cat. (1873), p. 182. Ujyper Lndlow ; 

 Benson Knot. 

 w. c. 6 



