1891.] THE SHELLS OF PERAK. 347 



Fam. VlVIPARID^. 



87. ViviPARUs suMATRENSis, Dunker. 



Paludina bengalensis, subsp. ■poly gramma, G. Nevill, Handl. 

 Moll. Ind. iMus. ii. 1884, p. 22. 



Paludina sumatrensis, de Morgan, Ball. p. 67. 



Qualla Kangsa {Townsend) ; Perak generally {de Morgan). 



88. Bythinia kintana, de Morgan. 



Bythinia kintana, de Morgan, Bull. p. 68, t. Hi. fig. 7. 

 Kinla valley (de Morgan). 



Fam. AssiMiNEiD.E. 



89. Assiminea carinata, Lea. 



Omphalotrojns carinata, de Morgan, Bull. p. 69. 



Assiminea carinata, Boettger, Jahrb. d. mal. Ges. xiv. 1887, p. 166. 



Kinta valley {de Morgan). 



Dr. Boettger, in his important monograph oi Assiminea, considers 

 this species to be a true Assiminea. De Morgan's note on its habitat 

 does not contradict this classification ; according to him it lives in 

 marshy parts of the forest near brooks as well as in vegetable mould. 



Fam. Melaniid^. 



90. Melania (Striatella) tuberculata, Miill, 

 Melanoides tuberculata, de Morgan, Bull. p. 73. 

 Prov. Wellesley {de Morgan). 



91. Melania (Striatella) Malayan a, Iss. 



Melania tuberculata, var. malayana, Issel, Moll. Born. p. 100. 



Melania malayana, Brot, Mart. Chemn. Mel. p. 253, t. 2o. figs. 

 5, 5 a. 



Melania tuberculata, subsp. malayana, G. Nevill, HandL ii. p. 247. 



Melanoides malayanus, de Morgan, Bull. p. 74. 



Sarawak {Issel). Abundant in all the brooks of the Malay 

 Peninsula {de Morgan). 



92. Melania (Striatella) truncatula, Lam. 

 Melanoides truncatulus, de Morgan, Bull. p. 73. 

 Prov. Wellesley {de Morgan). 



93. Melania (Melanoides) episcopalis. Lea. 



Melania variabilis, Bens., subsp. episcopalis, G. Nevill, Handl. 

 ii. p. 256. 



Sermyla episcopalis, de Morgan, Bull. p. 72. 



Qualla Kangsa {Townsend fide Nevill). Abundant in Perak 

 generally {de Morgan). 



