PLATE XLl. 



Scala (Stlicuorhytis) Ma:yckii Dall, basal view ; Miocene of Cainhoy, South 

 Carolina; diam. 28 mm. See The Nautilus, vol. ix., p. iii, February. i8q6. 

 The same, front view. 

 Ancillaria chipolaiia Dall; Oligocene marl of the Chipola River, Florida; alt. 



25 mm. 

 Pleurotoma boadicea Dall; Oligocene sands of Oak Grove. Florida; alt. 25 mm. 

 Chama Willcoxi Dall, interior of attached valve ; Pliocene of Shell Creek, 



Florida ; Ion. 85 mm. 

 The same, with both valves in place. 

 7. The same, interior of upper valve ; Ion. 85 mm. 



Scala rancllina Dall, basal view; Eocene of the Zeuglodon bed (Jacksonian), 

 near Cocoa P. O., Alabama ; diam. it, mm. See Tlie Nautilus, vol. ix.. 

 p. Ill, February, 1896. 

 Fig. 9. The same, front view; alt. (decollated) 23 '™n- 



Fig. 10. Astyris pcrfcri'ida Dall ; Oligocene sands of Oak Grove, Florida ; alt. 18 mm. 

 Fig. II. Tcrcbra psilis Dall; Oligocene sands of Oak Grove, Florida; alt. 16.5 mm. 



II97 



