3^8 ON THE SHELLS OF PERAK. [June 2, 



Var. PERAKENSis, de Morgan. 



Sermyla perakensis, de Morgan, Bull. p. 73, t. iv. fig. \4 = Melanin 

 irifrucostata, Reeve, Conch. Ic. fig. 14 {non Mouss.), teste de 

 Morgan. 



Kinta valley {de Morgan). 



"Sermyla " chaperi, de Morgan, I.e. p. 72 (unfigured), is hardlv 

 more than a slight variation ot" M. episcopalis. The brown bands 

 occur also in the type, and tlie second series of nodules in several 

 varieties, e.g. var. mertkeana, Lea, to which de Morgan's alleged new 

 species belongs, 



Fam. Unionid^. 



94. Anodonta cuMfNGii, Lea. 



Kinta valley {de Morgan). Malacca, Java, Borneo, Siam, Cam- 

 bodia. 



9.5. Anodonta chaperi, de Morgan. 



Anodonta chape-^, de Morgan, Bull. p. 75, t. v. figs. 1, 2. 



Kinta valley {de Morgan). 



96. Unio perakensis, de Morgan. 



Unio perakensis, de Morgan, Bull. p. 76, t. v. figs. 3, 4. 

 Kiuta valley {de Morgan). 



Fam. Cyrenid^. 



97. CoRBictJLA malaccensis, Desh. 



Kinta valley {de Morgan). Malacca {Deshuyes). 



EXPLANATION OF PLATE XXX. 



Figs. 1, la. E7Miea (Microsfrophia) pcrakmsis, p. 331. 



2, 2 a. ( ) himgcrfordiana, p. 331. 



3. ( ) mihcylindrica, p. 331. 



4-4 b. Lamprocysiis malayana, p. 333. 



5-5 b. conulina, p. 333. 



6, 6 a. ChJoTitis malayana, p. 335. 



7,7 a. Hypsdostuiiia huiiycrfordianum, p. 337. 



8-8 b. Alycceus diplochilus, p. 342. 



9 9 6. oliyopleuris, p. 342. 



10-10 b. microdiscus, p. 343. 



11-11 b. paxvulus, p. 343. 



12-12 b. microconus. p. 343. 



13. Biplovimatina (Smica) canaluvkita, p. 343. 



14. ( ) ventrindus, p. .343. 



15. ( ) diminuta, p. 344. 



