_ /I rr-i _ 



Genus _... ^....^I.i .je.yrich 



PKOTOGA:: .- . ..^..^..,.. ., 11, 



Protocai-dia -aaaicensis Dall, 1900, rrans. -:T ?ree Inst. 



3ci., Philadelphia, vol. '^ , '. :, ^.. 1114; 190r, "ot. 

 6, pi. 48, fig. S. 



Descrintioi: .- ''Shell small, pluji.o, .mlDqizadra',^ , , ith rather 

 high snhcentral umhones; anteiior end evenly re ' , osterior 

 very slightly rounded truncate; surface with very numerous radi- 

 ating threads crosr- - '^y concent'-^'' -" lines eve.il^ lispose'', v/hich 

 at the intersections reveal themselves hy renderii radii 

 headed; this sculpt^.ire covers a little less than the anterior half 

 of the disk, behinu .rhich the a . < l^ula , l.^-u -.^rrower and not head- 

 ed, separated by still narror/er channels; in the channel seoarat- 

 ing the anterior from the posterior type of scul-oture rises a 

 lov/ crest like a stri:-- - -^ -—"l" j.r'.uj, u;. ' ?h in each 

 second or third channel rises a rov; of small, stout, veri' cadu- 

 cous srtines, those on the :." area smai: ad shorter than 

 those on the disk; internally the margin is minutely serrate; "-'■ - 

 hin^e is nomsl. Ion- .", "'., '..:■, 'iam. 4.5 mm." 



"This species is nearest Protocardia 'oeramahi l is 'Dalld], 



fl). Bull. llus. Oompt. Zool. I-Iarvard, vol. 0, p. 1""? 1881; vol. 



70, pi. 4, fig. 7,186" ' *ardium l_ 



i V 1 '^ ^ 



