Family leiidae 

 Subfamily Leilnae 



Genus ISDA Schumacher 

 Section Jupiteria Bellardi 



LEDA ( JUPITERIA) PEITEILA Ball 



leda acuta Gahb, 1873, Trans. Am. Philos. Soc, new ser., vol. 15, 



p. 255, (ex parte). ]?ot I. acuta Oonrad, 1G?2. 

 leda peltella Ball, 1898, Trans. V/agner Free Inst. Sci., Philadelphia 

 vol. Z': pt. 4, p. 579 (name only), pi. ?2, fi^.' 5. 



Description .- "Shell elongate, convex, beaks central; anterior 

 end rounded, base broadly convex; posterior end acute, hinge slight- 

 ly concave from the beaks to the posterior end. Surface marked 

 by regular rounded concentric ribs. Length .^5 inch." (Gabb, 1873) 



Type l ocality .- Santo Domingo. 



Shell of medium size, plump, decidedly high, slightly inequilat- 

 eral; anterior and posterior ends alm.ost equally produced, the ant- 

 erior margin rounded and the posterior forming a rostrnjn, typical- 

 ly short, blnnt and very slightly recurved; ventral margin decid- 

 edly arcuate; umbones low, subcentral in position; lunule narrow 

 but distinct, bearing relatively coarse transverse elevations not 

 continuous with the concentric rugae; escutcheon large, bounded 

 by a well-marked carina; a faint sulcus visually nresent adjacent 

 to the rostral carina, anteriorlj? a second sulcus may be present; 



