PLATE XVIII. —continued. 



Fig. 132. Dorsal ridge from abo\e, middle portion, of P. sa)-pedon choredon, ad 

 figs. 130 and 131. 

 133. Outline of apex of valve of P. surpedmi teredon fi-om South India. 



i"'4- M M )' »» »> »' '» »» 



135. ^'alve with harpe of P. sarpedoa charedon from Cairns. 



136. Middle portion of dorsal ridge from above of P. aarpedon clwredon from 

 Eedscar Bay, British New Guinea. 



137. Dorsal ridge from apical side of P. sarpedon choredon, ad fig. 136. 



. . (from Neu Pommern = New 



138. y;i\\e with ly,\r\ie of P. sarpedommpanlis -i -u • • 



139. ,, .. ., ,, dodinrjensis from Halmaheira. 



140. Dorsal ridge from apical side oi P. sarpedon dodingensis, ad tig. 139. 



141. A'alve with harpe of P. sarpedon aoithedon from Ceram. 



142. Dorsal ridge fi'om apical side of P. sarpedon anthedon, ad fig. 141. 



143. Valve with harpe of P. sarpjedon niilon from S. Celebes. 



144. Dorsal ridge from apical side of P. sarpiedon rnilon, ad fig. 143. 



145. „ „ ,, dorsal „ „ „ ad figs. 143 and 144. 



(from Mt.Bonthain, 



146. ,, ., aiiiciU ., „ monhcolus] „ „ , , 



* S. Celebes. 



147. ., ,, ,, dorsal ,, „ „ ad fig. 146. 



148. Valve witli harpe of /'. sarpedon isander from Guadalcauar. 



149. .. ., ,. P. doomthas cloanthus „ ISikkim. 



150. „ ,. ., ., .. mimatranus from Dili, Sumatra. 



151. Dorsal ridge and sulxlorsal tooth of P. dou,nthus doanthus, ad fig. 149. 



(from the Shan 

 lo2. „ ,. ., .. ., „ •) 



" <■ States. 



153. ., ., ,. ,. .. clymenus from China. 



154. „ ,. „ „ ., , .. siim«<ra)Mi«, ad fig. 150. 



155. „ „ „ „ , „ from Dili. 



