11 



205 Lxicina edentula; (a) var. albida, gibbosior 



206 Childreiii (a. b.) Gray, in Annals of 



Philosophy (1824) 2 specimens: one being the 

 reverse of the other 



207 Tigerina, Cytherea tigerina, Lam. 



207a var. three, subgi'anosa. Lam. 



208 punctata. Cytherea punctata, Lavi. — 



Obs. The two last species are removed from 

 the place which Lamarck assigned to them 

 among his Cythereae, on account of their strict 

 accordance with the generic character of 

 Lucina; at the same time we must here ex- 

 press our intention of confining ourselves un • 

 der circumstances of this kind to such cases 

 as are indisputable 



209 divaricata 



210 • ■ squamosa 



211 globularis 



DOJVAX, 



212 Donax Scortum 



213 pubescens 



214 cuneata, numerous specimens and va- 

 rieties 



215 compressa 



216 deltoides; IcevigatayDillw. numerous va- 

 rieties in colour 



217 radians 



218 ringens 



219 rugosa 



220 elongata 



221 denticulata 



222 Meroe 



223 scripta 



223a — var. tumidior 



223Z» ■ var. compressa, suborbicularis 



224 Tnmculu^: 



