34 Thracia Conradi p. 22 



35 Thracia Declivis (T- Pha- 



seolina p. 22 



36 Mactra Australis p. 32 



37 Thracia Plicata p. 21 



38 Mulinia Byronensis p. 34 



39 Mactra Fasciata (copied 



from Gualtieri, as cited by 

 Lamarck p. 30 



40 Mactra Triangularis p. 31 



41 Mactra Lactea p. 31 



42 Solen Corneus p. 1 1 



43 Panopaea Arctica p. 18 



44 Ungulina Oblonga p. 41 



45 Pandora Ceylanica p. 50 



46 Oblonga p. 49 



47 Depressa p. 49 



48 Glacialis p. 49 



49 Flexuosa p. 49 



50 Unguiculus p. 49 



51 Corbula Biradiata p. 47 

 52 Ovulata p. 47. 



53 Rostrata (of Bro- 



( I crip) p. 40 



54 Crassatella Triquetra p. 37 



55 Mesodesma Complanata 



p. 38 

 56 Donacia p. 38 



57 Erycina Cardioides p. 40 



58 Crassatella Donacina p. 36 

 59 Lapidea p. 36 



60 Mactra Brasiliana var. 

 p. 31 



PLATE XI. 



I Clavagella Elongata Sheath 



p. 2 



2 valve p. 2 



3 Melitensis, valve 



p. 2 

 4 Lata valve p. 2 



5 Fistulana Clava, tube p. 3 



6 Mesodesma Glabella p. 39 



7 Cytherea Impar p. 98 



8 Pholas Clausa p. 6 



9 Crassatella Decipiens p. 36 

 10 Cytherea Impudica p. 96 



I I Psammobia Tellinella p. 



58 



