Fig. 



Cytherea concentrica 84 



i -juvenilis 85 



86 



Lucinaundata 87 



89 



Cytherea pectinata 90 



gibbia 91 



92 



93 



Cytherea di variant a 94 



Crassatella contraria 95 



96 



Cytherea scripta 97 



Lucina edentula 98 



99 



Cytherea gigantea loo 



Venus papilionacea 103 



106 



Venerupis perforans 108 



112 

 113 



Cyrena fluminea 114 



fuscata 115 



116 



SPONDYLUS. PI. 9. 



Plicatula ramosa s 



4 



CHAMA. PL 9. 



Icosardia Cor 



Tridacna Gigas 



Hippopus maculatus 

 Cardita sulcatus .. 



Fig. 



Icosardia Moltkiana 5 



Trigonia pectinata 6 



Cardita turgidus 7 



trapezoides 8 



phreniticus 9 



calyculatus 10 



Cypricardia Guinaica 14 



Cardita concameratus 15 



16 

 Cypricardia coralliophaga ... 17 



Chama damicornis 18 



Lazarus 19 



unicornis 20 



21 



Chama gryphoides 22 



calcarata 23 



radians. 24 



ARCA. PL 9. 



Area inaequivalvis 



4 

 5 

 6 



Area Helbingii 7 



8 



10 

 11 

 13 

 15 



Cucullaea auriculifera 16 



Area rhombea 19 



20 

 23 

 25 



Nucula Nicobarica 26 



pella 27 



