1891.] THE SHELLS OF PERAK. 347 



Fam. ViviPARiD.«. 



87. ViviPARTJS suMATRENSis, Dunker. 



Paludina bengalensis, subsp. poly(/ramina, G. Nevill, Handl. 

 Moll. lud. Mus. ii. 1884, p. 22. 



Paludina sumatreusis, de Morgan, Bull. p. 67. 



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



88. Bythinia kintana, de Morgan. 



Bythinia kintana, de Morgan, Bull. p. 08, t. Hi. fig. 7. 

 Kinla valley (de Morgan). 



Fam. AssiMiNEiDJE. 



89. AssiMiNEA CARiNATA, Lea. 



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



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



Kinta valley [de Morgan). 



Dr. Boettger, in his important monograph of 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 ot the forest near brooks as well as in vegetable mould. 



Fam. Melaniid^. 



90. Melania (Striatella) tuberculata, Miill. 

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

 Prov. Wellesley {de Morgan). 



91. Melania (Striatella) malayana, Iss. 



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



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

 5, 5 a. 



Melania tuberculata, suhsp. 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. 7'2. 



Qualla Kangsa {Townsend fide Nevill). Abundant in Perak 

 generally {de Morgan). 



