40 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I45 



Comparison with other species. — E. tamiamiensis is similar to 

 Encope macrophora (Ravenel) from the Late Miocene of South 

 Carolina. However, in E. tamiamiensis the margin is thinner, the 

 lunule is smaller, and the apical system is less anterior (text fig. 33). 

 Furthermore, in E. tamiamiensis the anterior paired petals (II and 

 IV) are less curved posteriorly. Both species have the same length- 

 width ratio (text fig. 31). 



Occurrence. — Tamiami formation (typical), loc. 9, 10, 11, 14, 15, 

 17, 18, 19. 



Fig. 35. — Encope tamiamiensis Mansfield: Adoral view of U.S.N.M. 648141, 

 from the Tamiami formation, loc. 31, X !• 



Tamiami formation ("Buckingham" facies), loc. 20. 



Tamiami formation (barnacle-echinoid-oyster facies), loc. 26, 27, 

 28, 29, 31, 32. 



Types.— Figured specimens, U.S.N.M. 648137, loc. 27; U.S.N.M. 

 648138, loc. 26; U.S.N.M. 648139; loc. 11; U.S.N.M. 648140-1, 

 loc. 31. 



MELLITA ACLINENSIS Kier, new species 



Plate 15, figures 1-3; text figures 36-41; tables 3, 4 



Diagnosis. — Species characterized by five ambulacral lunules. 

 Material. — Eleven nearly complete specimens and many fragments. 



