96 



a68 



iVlargineSIa mindiensis Cossmann Plate 6, figures i6, 23 



Marginella mindiensis Cossmann, 1913, Journ. de Conchyliologie, vol. 

 61, p. 61, pi. 5, figs. 13-15. 



This shell is very closely related to M. MacDonaldi, It dif- 

 fers only in being smaller and usually with the outer lip more or 

 less denticulated. The outer lip of M. MacDojialdi is generally 

 smooth but occasional specimens occur in which the outer lip is 

 faintly denticulated. It is a species of the Canal Zone. 



Length 19.5; basal diameter 11, vertical diameter 8 mm. 



16 9 7 mm. 



Gatun Stage: Miiidi, {Coss7?ia?iJi) 

 Gatiin, C. Z. 



Marginella latissima Dall 



Marginella latissima Dall, 1896, Prac. U. S. Nat. Mus. , vol. 19, p. 308, 

 pi. 29, fig. II. 



This is a short and very broad species, described by Dall 

 from Moen Hill, C. R. Dall remarks;"This is perhaps the short- 

 est and widest American species." 



Length 11, diameter 8.5 m^m. 

 Gatmi Stage: Moe?i, Costa Rica, {Gabb). 



PVlarginelia latissima, var. pilshryi, n. var. Plate 10, figures i, 2 



Marginella coniformis Brown and Pilsbry, 1911, Proc. Acad. Nat, Sci. 

 Phila. , vol. 63, p. 348, pi. 24, fig. 12. Not of Sowerby, 1849. 



Like M. latissima Dall, but less broad, more pointed anteri- 

 orly, a slightly higher spire and a less heavy outer lip. In latissi- 

 ma, the two posterior plications are shown as being very oblique, 

 while in the present form they are nearly transverse as is seen in 

 the recent cinda. The outer lip is finely granulated. 



Length 14, basal diameter 9.5, vertical diameter 6.75 mm. 

 15 II 9 mm. 



This shell is figured as the Marginella co?iiformis Sowerby 

 a common Dominican fossil, by Brown and Pilsbry. The Marg- 



