CONTENTS. Xin 



Systematic arrangement — Continued. 

 Gastropoda — Continued. 



Order Prionodesmacea — Continued. Page. 



Family Ostreidae 123 



Genus Ostrea 123 



seilaeformis var. rugifera 123 



maurieiensis 123 



. vaugliani 123 



Family Pectinidae 124 



Genus Pecten 124 



(Aequipecten) chipolanus 124 



Family SiJondylidae 124 



Genus Spondylus 124 



bostrycbites 124 



chipolanus 125 



Genus Plicatula 125 



densata 125 



Family Anomiidae 126 



Genus Anomia 126 



microgrammata 126 



Family Mytilidae 126 



Genus Modiolus 126 



silicatus 127 



blandus 127 



(Bracbydontes) grammatus 127 



(Gregariella) minimus 128 



cf. opifex 128 



(Botula) cinnamomeus 128 



Genus Lithopbaga 128 



antillarum 129 



nigra 12D 



nuda 129 



(Myoforceps) aristata 130 



(Diberus) bisulcata 130 



Family Pleuropboridae 131 



Genus Coralliopbaga 131 



elegantula 131 



Family Crassatellitidae 131 



Genus Crassatellites 131 



deformis 131 



Family Carditidae 132 



Genus Venericardia 132 



serricosta 132 



himerta 132 



Genus Cardita 132 



(Carditamera) tegea 133 



sbepardi 133 



Family Cyrenidae 133 



Genus Cyrena 133 



(Polymesoda) pompbolyx 134 



Genus Villorita 1^4 



floridana 134 



