lljS LAMKFJ.lF)r-:NS 



shell pale flesh-color shadinj^ to iridescent bluish-white, very 

 minutely granulate. 



Long. 35. lat. 84 mm." (Preston). 



Type locality. Narainpore P.hil, Murshidabad District, 

 Bengal. 

 Lauiellidciis iiarainporcusis PrEston^ Rec. Ind. Mus., VII, 



1912, p. 306. 



Lamellidens nongvangensis Preston. 



"Shell very elongately ovate, inflated, covered with a black- 

 ish-brown, finely laminiferous periostracum, concentrically 

 marked with rather coarse lines of growth ; dorsal margin 

 anteriorly somewhat straight, posteriorly arched above, sloping 

 and slightly excavated below ; ventral margin scarcely rounded ; 

 anterior side abruptly descending; posterior side rostrate, 

 obtusely rounded ; cardinal teeth very anteriorly situate, trian- 

 gular, erect ; lateral teeth elongate, also erect, terminating pos- 

 teriorly in an abrupt slope; anterior scars deeply marked; 

 posterior scars lightly impressed ; interior of shell flesh-colored 

 shading to bluish, iridescent, minutely pitted and granulate. 



Long. 45, lat. 94 mm." (Preston). 



Type locality, Nongy^ang Lake, South of Patkai. 

 Laniellidcns nougyangcnsis Preston, Rec. Ind. Mus., VII, 



1912, p. 306. 



Lamrllidens phenchooganjensis Preston. 



"Shell very elongately ovate, posteriorly obtusely rostrate, 

 dark blackish-brown, sculptured with fine, concentric strise, 

 crossed, especially in the anterior median region, by fine, 

 slightly distant, transverse, radiate strise, thus presenting a 

 minutely wrinkled appearance ; umbones flattened, much 

 eroded ; dorsal margin anteriorly gently sloping, posteriorly 

 more rapidly sloping in a slight curve ; ventral margin scarcely 

 rounded ; anterior side angled above, gently rounded below ; 

 posterior side produced, angularly rounded; hinge teeth very 

 elongate, somewdiat fine ; anterior scars ovate, moderately im- 

 pressed ; posterior scars roughly triangular, not well impressed ; 

 interior of shell sliading from pale brown to bluish, nacreous, 



