PLATE L. 

 Fig. I. CrassatelUtcs (CrassincIIa) acutus Dall, exterior of left valve; Pliocene of 



the Caloosahatchie ; alt. 4.0 mm. ; p. 1479. 

 Fig. 2. Crassatellites (Crassinella) bowdenensis Dall, exterior of right valve; Oligo- 



cene marl of Bowden, Jamaica ; alt. 4.0 mm. ; p. 1476. 

 Fig. 3. The same, interior of left valve ; alt. 3.5 mm. ; p. 1476. 

 Fig. 4. Crassatellites (Crassinella) acutus Dall, interior of left valve; alt. 4.0 mm.; 



P- 1479- 

 Fig. 5. Crassatellites (Crassinella) duplinianus Dall, interior of right valve; Miocene 



of Duplin County, North Carolina; alt. 3.22 mm.; p. 1478. 

 Fig. 6. The same, exterior of left valve ; alt. 3.22 mm. ; p. 1478. 

 Fig. 7. Phacoides (Pleurolucina) quadricostatus Dall; Oligocene marl of Bowden, 



Jamaica ; Ion. 6.0 mm. ; p. 1368. 

 Fig. 8. Phacoides (Parvilucina) intensus Dall; Pliocene of San Diego, California; 



Ion. 5.0 mm.; p. 1385. 

 Fig. g. Phacoides (Here) hamatus Dall ; Claibornian Eocene ; Ion. 14.0 mm. ; p. 1364. 

 Fig. ID. Phacoides (Here) tithonis Dall; Oligocene marl of Bowden, Jamaica; Ion. 



4.5 mm. ; p. 1366. 

 Fig. II. Phacoides domingensis Dall; Oligocene of the Tampa, Florida, silex beds at 



Ballast Point ; Ion. 22.0 mm. ; p. 1363. 

 Fig. 12. Phacoides (Here) podagrinus Dall, umbonal view of left valve; Oligocene 



marl of Bowden, Jamaica ; Ion. 29.0 mm. ; p. 1365. 

 Fig. 13. The same, side view of the same valve; p. 1365. 



Fig. 14. Phacoides (Miltha) ocalanus Dall, internal cast from the Ocala, Florida, Oligo- 

 cene limestone; Ion. 41.0 mm.; p. 1375. 

 Fig. 15. Phacoides (Here) wacissanus Dall, exterior of right valve ; from the Ballast 



Point Oligocene silex beds ; Ion. 16.0 mm. ; p. 1365. 

 Fig. 16. Phacoides (Miltha) Aoridanus Conrad, from a recent specimen for comparison; 



Ion. 32.0 mm. ; p. 1378. 

 Fig. 17. Phacoides (Here) Glenni Dall; from the Chipola Oligocene; Ion. 30.0 mm.; 



p. 1366. 

 Fig. 18. Phacoides (Miltha) claibornensis Conrad; from the Eocene of the Claiborne 



sands of Alabama ; Ion. 36.0 mm. ; p. 1374. 



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