34 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 66 



Page 



Siliqua 26 



Siphonaria 26 



Solariella 26 



Spisula 26 



Sthenorytis 27 



Stromhina 27 



Suavodrillia 27 



Surculina 28 



Terebra 27 



Terebratalia 27 



Thracia 28 



Trichodiscina 28 



Tritonalia 28 



Tromina 28 



Page 



Trophon 22 



Turbo 28 



Turcicula 29 



Turricida 29 



Turris 30 



Urosalpinx 30 



Valvatella 19 



Vesicomya 30 



Valuta 30 



Volutharpa 30 



Volutopsius 30 



Volvula 31 



Williamia 31 



Yoldia -r 31 



