PLATE XXXVII. 



Fig. 7- 



Semclc Lcana Dall ; Caloosahatcliie beds ; Ion. 54 mm. : p. 992. 



Scmclc Lcana Dall, umbonal view ; p. 992. 



Sonde chipulana Dall, Chipola beds; Ion. 54 mm.; p. 986. 



Scmclc pcrlamcllosa Heilprin; Caloosahatcliie Pliocene; Ion. 54 mm; p. 992. 



The same, umbonal view ; p. 992. 



Crassatcllitcs mclinus Conrad, variety mcridionalis Dall; Miocene of Alum 



Bluff, Florida ; Ion. 69 mm. 

 Tcltina segrcgata Dall, left valve ; Ballast Point, Tampa Bay, silex beds ; Ion. 



17 mm. ; p. 1019. 

 The same, dorsal view ; p. 1019. 

 Macoma Lyclli Dall, internal cast, showing impression of right valve; Miocene 



of Gay Head, Martha's Vineyard, Massachusetts ; Ion. 43 mm. ; p. 1049. 

 The same, umbonal view of another internal cast ; Ion. 39 mm. ; p. 1049. 

 The same, internal cast showing impression of right valve of same specimen 



as figure 9 represents ; Ion. 43 mm. ; p. 1049. 

 Clemcntia Grayi Dall; Oligocene of Oak Grove sands; Ion. 64 mm. 

 Crassatellites melinus Conrad, variety mcridionalis Dall ; Miocene of Alum 



Bluff, Florida ; same specimen as Figure 6, viewed dorsally ; Ion. 69 mm. 

 Pectcn Panneleei Dall ; Pliocene of San Diego, California ; alt. 45 mm. ; p. 708. 

 The same, enlarged view of secondary sculpture. 



[I93 



