33 8 Quarterly Jour rial of Conchology. 



P. vexillu/n, Pse., InHneaia, P.se., and trilineata, Psc, are very 

 near, and probably will eventually be united by intermediate 

 gradations. 



P. simplaria, Morelet, is synonym of P. varia, Brod. 



P. cognata, Pse., is intermediate between varia and rosea^ 

 Brod. Probably the three vail eventually be united. 



P. lignaria, Pse., synonym of P. affinis, Pse. 

 P. Huaheinensis, Garrett = P. luguhris, Pse., and P. pulchra, 

 Pse., is only var. minor of the same, 

 P. globosa, Pse. = P. Hebe, Pfr. 

 P. approximata, Pse., MS. = iuipcrforata, Pse. 

 P. rusfica, Pse. =^ P. a-assilabris, Pse. 

 P. ahhreviata, Mousson, seems the saa:ie as solidula, Rv. 



P. coirpacta, Pse. = callifera, Pfr., according to a specimen 

 identified by Mr. Sowerby at the British Museum. 



P. gracilis, Pse. ==; attenuata, Pse. 



P. sviiulans. Pse. = striolata, Pse. 



P. subgouochila, Mous. I cannot see the difference between 

 this and P. gonocliila, Pfr. 



P. tenrstris, variabilis and profea, Pse.^ seem distinct and 

 belong to the same group as the well-known P. faba, Martyn, 



There are many species of which I have never seen specimen.^, 

 and I doubt not that amongst them further rapproc/ie/iiejrts might 

 be made. C P. G. 



Dec. 1 2th, 1877. 



