EXPLANATION OF PLATE X 



EOCENE AND MIOCENE FOSSILS 



FIG. i. Callocardia ? {Pitaria f) kincaidii Dall ; Miocene ; length 

 50.0 mm. ; p. 1 15. 



2. Trochita alaskana Dall; Miocene; basal view of internal 



cast; diameter 12.0 mm.; p. 118. 



3. Modiolus alaskanus Dall; Eocene; length 17.0 mm. ; p. 106. 



4. Saxidomus popofianus Dall ; Miocene; length 50.0 mm. ; p. 



"5- 



5. Papyridea harrimani Dall ; Miocene; length 45.0 mm.; p. 



"3- 



6. Trochita alaskana Dall ; profile of elevated specimen ; Mio- 



cene ; height 20. o mm. ; p. 118. 



7. Dosinia ? alaskana Dall; Miocene; length 55.0 mm.; p. 



"5; 



8. Crepidula ungana Dall ; Miocene ; basal view ; length 38.0 



mm. ; p. 1 19. 



9. The same ; three adult specimens illustrating the perching 



habit of this form; length of the uppermost specimen 38.0 

 mm. ; p. 1 19. 



