THRACIA. Leacw (}). 
(Anatina Convexa, 41.) 
(Anatina Pubescens, 41.) 
(Anatina Declivis, 42.) 
fT. 
LUTRARIA. 
Oblonga, 44. 
Eiliptica, 45. 
LISTERA (k). Turron. 
L. Compressa (Lutraria, 
C.45). | 
MACTRA. 
Solida, 46. 
Truncata, 46. 
Subtruneata, 47. 
Stultorum, 47.. 
(7) Tyansversely oval-oblong, 
gaping at each extremity. 
or less prominent horizontal] spoon-shaped tooth which 
receives the ligament. 
(4) Transverse, oval, equivalve, a little open at the 
Hinge with a spoon-shaped tooth and additional 
denticles, no lateral teeth. 
sides. 
Hinge consisting of a more 
Cinerea, 47. 
Glauca, 48. 
Fragilis, 48. 
Elliptica, 244, f. 28. 
LEPTON. 
Squamosum, 49. 
Nitidum, 49. 
GOODALLIA (1). 
Triangularis, 49. 
Minutissima, 50. 
ERVILIA. 
Nitens, 50. 
Pellucida, 245: 
KELLIA. 
Suborbicularis, 51. 
Palleal scar deeply impressed. 
Ligament external. 
(1) Possibly young AsTARTE’s. 
eens 
inequivalve, slightly 
