INDEX 



or 



SPECIES RETAINED IN THE SECOND PART OF THIS WORK. 



AVICULA, (sub-genus) PTEROPERNA emarginata 



pygmeea . 



concinnum 

 pes-bovis 

 semicostatum . 

 Stricklandi 

 subtrigonum 

 ITA concentrica 

 plicata 

 similis 

 Symondsii 

 undulata 

 aspera 

 Lajoyei 

 var. cingenda 



(sub-genus) SPHJERA madridi 

 (sub-genus) CORBICELLA Bathonica 

 LA involuta 

 JAHDIA Bathonica 

 nuculiformis 

 rostrata 



IA depressiuscula 

 jurensis 

 Loweana 

 nuciformis 

 subrotunda 

 trapeziformis . 



PAGE 

 19 

 ib. 



64 

 65 

 ib. 

 63 

 64 

 ib. 

 108 

 107 

 109 

 106 

 ib. 

 70 

 69 

 70 

 71 

 95 

 97 

 75 

 76 

 75 

 90 

 89 

 88 

 90 

 89 

 89 



