- 1.' 



ARGA (SGAPHAROA) HAXIDONATA var. HI3PAFI0LIA n. nom. 



■\roa oonsobrina Sowerby, 1850, Quart. Jour. Geol. Soe. london, 



vol. 6, p. 52, pi. 10, fig. 12. 

 Arcs f Anadara ) oonsobrina Sowerbj;, '"-abb, 1872?, Trans. Am. Philos. 



Soo., new ser., vol. 15, p. 253. Uyn. excl.) 

 Area oonsobrina Sowerby, Gupn.j, 187!^, Geol. Kag., Decade 2, vol. \^ 



1, p. 447. (check: list), ex parte. 

 Area oonsobrina Sowerby. Guppy, 1876, Quart* Jour, Geol. Soc, 



london, vol. 52, p. 551. 

 Hot A. oonsobrina ri'Orbigny, 1844. 

 ? Area of. oonsobrina M oore, Toula, 1908, Jahrb. Z.-k. geol. rJeich- 



sanstalt, vol. 58, T^p. 717-718, ol. 27, fig. 1. 

 Hot A. oonsobrina Sowerby of Guppy, 1866 (= A. hali(ionata Dall) 



or Gabb, 1881. 



Description .- "Testa oblonga, oblioua, aequivalvis, ra'^ia- 

 tim costata, lateribiis superne angiLlatis, antico infra rotundata, 

 postico rotu dato- anp-ulato ; costis angustis, numerosis, plerum- 

 que quadratis, et decussatis, ad basin sulcoteniji divisis, posti- 

 cis fere laevibns, planulatis; area cardiijali latiusulca." (Sow- 

 erby, 1850). 



Type locality.- Santo Domingo. 



