Geniis AB2A (Lea oh) LairBrck. 

 ABRA TPJ.^TCrULATA Dall. 



Abra triaap-ulat a Dall, 1900, Trans. V/agner ?ree Inst. 3ci., 



Philadelphia, vol. ?, pt. 5, p. 997, pi. 49, firr. 4. 



Dr scriptio n.- "Shell small, thin, polished^ siihtrironal, 

 nearlj^ equilateral, v/ider than hirrh, moderately inflated; beaks 

 pointe'-'', not mnoh elevated, the dorcal margins straight, diverg- 

 ing at -he rniiho in an angle of somev/hat over ninety degrees; 

 "base arcuate; anterior enr! sli??htly lons-er, rounde:'; posterior 

 end shorter, more pointo ; c-.\:erior polished; anterior dorsal 

 mar^-in in the right valve vath a lateral tooth at some distance 

 from the hinge-plate; on the posterior margin' is a. short fold 

 not elevated to beGo:.:t; c jooth; -^-h^' left valve shows no lat^als. 

 Alt. 5.5, lat. 5.S5, diarn. '^,0 :ta." 



"This STseeies is not uiiliire A. lioica Dall (l) of the recent 



(1). Bull. IIus. Gompt. Zool., Harva d, vol. ', p. 17.?^, laai, 



fas Syndosmya lioica) ; vol. IT, p. 273, pi. '■ , fig. a, 1886, 



fauna, but of a more ev'-.nly tri ortline and with the ant- 



eri'.r part less produced." (Dall, 1900). 

 T^pe loc Blity .- Bo';vden, Jamaica. 



