PERNA. 



517 



Cecillii, Phil 

 corrugata, Stimp. 

 elegans, Gray. 

 elongate, Swains. 

 ferruginosa, Phil. 

 flabellata, Gould. 

 flavida, Dkr. 

 Fortunei, Dkr. 

 glaberrirna, Dkr. 

 gracilis, Phil. 

 grandis, Phil. 

 gubernaculum, Dkr. 

 hepatica, Gould. 

 inconstans, Dkr. 

 Japonica, Dkr. 

 Malayan a, Phil. 

 Metcalfei, Haul 

 microptera, Desh. 

 modiolus, Linn. 

 modulaides, Bolt. 

 nitida, Hani 

 Patagonica, D'Orb. 



pcrfragilis, Dkr. 

 pbaseolina, Phil. 

 Philippinarum, Hani 

 picta, Dkr. 

 plicate, Gmel 

 recta, Conr. 

 rbornboidea, Hani 

 Rumpbii, Phil. 

 securis, Lam. 

 semifusca, Lam. 

 Senbousia, Bens. 

 siliqua, Phil. 

 sordida, Haul 

 speciosa, Dkr. 

 splendens, Dkr. 

 strigata, Hani 

 subpurpurea, Dkr. 

 triangulum, Koch. 

 tristis, Dkr. 

 umbilicata, Penn. 

 undulata, Dkr. 



Sub-gen. brachydontes, Swainson. 



Sbell with the valves radiately sulcated ; hinge-margin form- 

 ing an angle with the anterior slope and crenulated. 



crebristriata, Conr. 

 crenulata, Dkr. 

 emarginata, Bens. 

 Magellanica, Dkr. 

 modiolus, Linn. 

 Petagnai, Scaech. 



plicatula, Lam. 

 purpurata, Lam. 

 setigera, Dkr. 

 striatula, Hani 

 subramosa, Hal 

 subsulcata, Dkr. 



Sub-gen. adula, H. and A Adams. 



Shell elongate, cylindrical, posterior side obliquely truncate ; 

 beaks sub-central. 



soleniformis, D'Orb. 



VOL. II. 



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