774 



NORTH AMERICAN INDEX FOSSILS. 



551. F. henekeni Sowerby. (Fig. 1127, b.) Oligocenic. 

 Whorls round, rather closely embracing, with stout round ribs 



and simple spirals, with intercalated secondary ones in the later 

 whorls. 



Bowden beds of San Domingo and Jamaica. 



552. F. haitensis Sowerby. (Fig. 1127,0.) Oligocenic. 

 Like the preceding, except that the last two whorls show flatten- 

 ing of the shoulders and peripheral angulation, with rude nodes. 



Occurs with the preceding. 



Fusoid Shells of Undetermined Relationship. 



CLXI. Falsifusus Grabau. 



Like Fusus in general form, but with protoconch consisting of 



a number of gradually enlarging, smooth whorls merging into the 



conch, the whorls of which early become angular. Eocenic. 



553. F. meyeri (Aldrich). (Fig. 1 128.) Eocenic. 



Fig. 1 128. Falsifusus meyeri. Fig. 1 1 29. Fulguro- Fig. 1 1 30. Fulgtiro- 



( After Harris.) fusus quercollis. (After fusus rugatus. (After 



Harris. 



Harris. 



Whorls angular almost throughout; ribs and simple spirals con- 

 tinue to lip ; spire and canal of equal length, very slender. 

 Midwayan and Chickasawan of Gulf States. 



