- 139 - 



ings y.fcieh prolDable also are ^"oung haitensis . Brc- " ''^llsbrj 



plaoe'i 'loi'.la's Gati^n form in the s^/nonj^my of a new s-^ecies, £, gat - 

 tuie lis is , of -^vhieh yonng specimens refiemTDle haitenois . but \-;ith the 

 plications less shax'p, while the aci.ult t^/pe has low, ron.nde'^ , sorae- 

 vrhat irregular plications tha.t produce an a-opearance different from 

 the typical haitensis . 



Qcourrence .- Upoer Olierocene.- j nto Domirgo (Sowerhy, 1850; 

 Gabh, 1875; Gupo^, 1874, 1873); Ohipolaraarl, -lorida (Dall, 1308, 

 Gardrier, I.Ies.); Oak Grove sand, Florida (Dall, 1898; Gardner, I.Iss.); 

 Shoal Hiver marl, Florida (Gardner, Mss.); ?Gatun formation, Pan- 

 ama (Tonla, 190^; Brown and Pilshr';, 1911); I-ox-er I'ioeene: 

 Bowden beds, 3o',vden, Jam.ai3a (Guopy, 1866; Dall, 1898)^ ? Oliso- 

 cene (?).- Tehuantepec, Mexico (Toula, 1911), Miocene (?).- Oer- 

 ros Island, off lower California ( 3ahb , 1869); Jarrizo Greek, Jali- 

 fornia (^onrad, IS'o, 1857); other localities in California (auc^- 

 ores). Pliocene (?).- Hoker Canyon, near Fewhall, California, 

 (English, 1914 fl) ). Post Pliocene (?).- ■-'an Bruno, east side 



(1). Univ. California ^ub. , Bull. De^ot. Geol., vol. 8, ^o. 203- 

 218, 19^4 (as 0^ veatchii ':abb) 



of the peninsula of Lov/er California (Gabb, 1869). 



