- 57 - 



Section leda s. s. 

 lEDA (lEM) I^DIGSIIA Dall. 



Le6a bisiiloata Guppy, 1867, Geol. Ivla:^., Decade 1, vol. 4, pp. 

 500-501, fig. 2. 



Leda b isnloata Ouppy, 1374, Geol. Hag. Decade 2, vol. 1, p. 442 

 (check list) 



Leda bisulcata Guppy. 188S, Proo. Soi. Assoc. Trinidad, p. 17?, 

 pi. 7, fig. 7. 



I'lot L. bisnlcata reek and "■a.yden, 1861. 



Leda indigena Dall, 1898, Trans. V/agne r Free Inst. Sci., Phila- 

 delphia, vol. 3, pt. 4, p. 579 (nanie only). 



Description .- "Shell ovately trigonal, \vith numerous concen- 

 tric ribs narrower than their interstices; 'Alth a somewhat sinuous 

 elevated ridge running from the umbo to the pointed rostrum behind; 

 rounded anteriorly with a roiind groove running from the umbo to 

 the ventral margin near the anterior angle. IJmbones close; oost- 

 erior dorsal area flat, sloping, striate continuously with the 

 ribs of the disc; no very distinct anterior area. Teeth very 

 prominent." (Guppy, 18 67) 



Type locality .- Jamaica. 



Shell small, moderately inequilateral; posterior dorral 

 margin slightly e: cavated; rounded anteriorly, sharply rostrate 



