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On a new Modiola and a new Tellina. 



XII. — Descriptions of a new Modiola from Ceylon and of a 

 new Tellina from JS\w Caledonia. By H. B. PRESTON 

 F.Z.S. 



Modiola taprobanensis, sp. n. 



Shell inflated, irregularly trapezoidal, somewhat curved, 

 polished, shining, covered with a dark olive-green periostracum, 



which becomes paler posteriorly and is rather wrinkled towards 

 the anterior ventral region ; both valves marked with irre- 

 gular concentric growth-lines, angularly swollen anteriorly - r 

 nmbones much eroded; dorsal margin straight; ventral 

 margin curved, slightly gaping in the middle ; anterior side 

 sharply rounded ; posterior side sloping, obliquely rounded 

 below ; interior of shell nacreous, polished, bluish grey ante- 

 riorly, brownish bronze posteriorly. 



Long. 8'5, lat. 1 8 mm. 



Hub. Ceylon. 



Modiola taprobanen •> is 



Tellina viator. 



Tellina viator, sp. n. 



Shell thin, elongately ovate, bright pink, concentrically 

 striate, the stria? becoming much coarser anteriorly ; dorsal 

 margin almost straight ; ventral margin scarcely rounded ; 

 anterior side abruptly rounded ; posterior side sloping above, 

 somewhat rostrate below. 



Long. 8, lat. 15 mm. 



llab. Noumea, New Caledonia. 



