P L I C A T U L A. 



Species 12. (Fig. a, b, c, d, e, JIus. Brit.) 



Plicatula Philippinai:um. Pli. testa magn't, solida, 

 pallide fulvd vel sitbcceruled, j^lerumque divaricatim 

 ruhro vel nigra lincald ; plicis magnis, continuis, 

 nonminquam divisis, ad angiduiii rwi<Mme iiii- 

 brkalis. 



The PiiiLiiTiNE Pi.lCATULA. Slicll large, solid, pale 

 fulvous or bluish, generally divergently lineatcd 

 with red or black ; plaits large, contiiuiou.s, 

 occasionally divided, very rarely imbricated. 



H.\NLEy. Recent Shell.^. 



Hab. Various localities among the Philippine Islands. 



The figures will show that this species is subject to 

 the usual irregularities in growth. Tlie plaits are 

 larger, more angular, and less branched than those ol' 

 Plicatula 



Species i;5. (Mus. Brit.) 



Plicatula dubia. Pli. tcstd tenui, foliace'i, depressd, 

 subrotundata ; plicis brevibus, intemiptis, irregu- 

 laribus, foliis extantibus, fornicatis, truncatis, 

 paucis ; colore fusco-rubescenti, casianeo maculato, 

 prope innboiies minute punctata. 



TuE DUBIOUS Plicatula. Shell thin, foliaceous, de- 

 pressed, somewhat rounded ; plaits short, inter- 



rupted, irregular, with extant vaulted, truncated, 

 few foliations; colour reddish-brown, spotted with 

 chestnut minutely dotted near the umbones. 



IIaxley. Recent Shells. Sowerby's Thesaurus. Pli. f. 19. 



Ilab. Isl. Samar, Philippines. 



The small white shell figured in Thesaurus as 



Plicatula duhia (var.) can scarcely belong to this 



species. It is probably an irregular form of Plicalidn 



Axi^tralis. 



Species 14. (Mus. Brit.) 



Plicatula Ceylonica. Pli. testd solidd, subtrigond, 

 pallide cinnamoned, jtostice producfd, acuminata, 

 2)l!cis jtiagnis, angulatis, valde divaricatis, imbri- 

 catis, liiieis divaricatis, brcvibus, cimiamoncis super 

 castas noiatis. 



The Ceylon Plicatula. Shell solid, subtrigonal, 

 pale cinnamon, produced posteriorly, acuminated, 

 plaits large, angular, very divergent, imbricated, 

 marked on the ribs with short divergent cinnamon 

 lines. 



SoWEItBY. 



Ilab. Ceylon. 



The ribs are sharply angular, branched, and im- 

 bricated ; characteristics which taken in connexion 

 with the widely distant locality prevent our placing the 

 shell as a variety of Plicatula Pldlipipinarum. 



October, 1873. 



