Papyracea, 29. 
Tuberculata, 30. 
Striata, 31. 
Dactylus. 31. 
Candida, 31. 
Parva, 32,7. 01. 
XYLOPHAGA. 
Dorsalis, 32. 
GASTROCHAN 4. 
Modiolina, 33. 
GALEOMMA., 
Turtoni, 33, te (2: 
SOLEN. 
Vagina, 34. 
Novacula, 35. 
~ Siliqgua, 35. 
~Ensis, 35. 
Pelluctdus, 35, f. 106. 
Legumen, 36. 
~~ 
XN] 
SOOO OIL ILOLOLOLLLL LLLP 
Coarctatus, 36. 
Declwrs, 37. 
Fragilis, 37. 
Candidus, 38. 
Scopula, 38. 
PANOPLA. 
Arctica, 38. 
MYA. 
Truncata, 40. 
Arenaria, 40. 
M. ? Decussata, 41. 
LYONSTA. Tor- 
TON (2). 
(Mya Norwegica, 40.) 
ANATINA. 
Truncata, 42. 
Pretenius, 48. 
Distorta, 43. 
Arctica, 42. 
(7) Transverse, inequivalve, inequilateral, open at the 
anterior end. 
moveable tooth common to both the valves, and uniting 
Hinge with a transverse heart-shaped 
them by a transverse cavity in each; ligament internal. 
——— 
