2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I45 



many echinoids. Drs. Norman F. Sohl and Richard S. Boardman 

 critically read the manuscript and made valuable suggestions. I thank 

 F. Stearns MacNeil for his opinions on the stratigraphy of the Late 

 Tertiary of Florida and Dr. J. Wyatt Durham and Mrs. Carol Wag- 

 ner for their opinions on several of the clypeasteroids. The graphs, 

 map, and the text-figure of the tubercles of Lytechinus variegatus 

 plurituberculatus Kier, new subspecies, were drawn by Lawrence B. 

 Isham, scientific illustrator, Department of Geology, U. S. National 

 Museum. 



The cost of the publication of the plates was covered by part of 

 a grant from the National Science Foundation. 



PREVIOUS WORK 



Very little work has been done on the echinoid faunas of the 

 Caloosahatchee and Tamiami formations. Twitchell (in Clark and 

 Twitchell, 1915, p. 218) described one species from the Caloosa- 

 hatchee, Diplothecanthus dalli, and referred another specimen to 

 Diplothecanthus rosaceus (Linnaeus). These specimens were referred 

 by Cooke (1942, p. 11; 1959, p. 34) and DuBar (1958, p. 209) 

 to Clypeaster rosaceus (Linnaeus) and are herein considered as a 

 subspecies, C. rosaceus dalli. Clark and Twitchell (1915, p. 209) 

 referred some specimens from what is now considered the Tamiami 

 formation to Encope macrophora (Ravenel). Mansfield (1932, p. 

 48) erected a new subspecies Encope macrophora tamiamiensis, which 

 Cooke (1942, p. 20) considered as a separate species referring Clark 

 and Twitchell's specimens to it. Mansfield, in the same paper, de- 

 scribed a new cassiduloid, Cassiditlus (Rhynchopygus ?) everglad- 

 ensis, a species herein referred to Rhyncholampas. Finally, DuBar 

 (1958, p. 61) stated that a large echinoid fauna, including several 

 regular forms and cassiduloids, occurred in his Bee Branch member 

 of the Caloosahatchee formation. 



ECHINOIDS FROM THE CALOOSAHATCHEE FORMATION 



The echinoid fauna of the Caloosahatchee formation comprises 

 seven species, including one new species and two new subspecies : 



Lytechinus variegatus plurituberculatus Kier, new subspecies 



Echinometra lucunter (Linnaeus) 



Encope michelini imperforata Kier, new subspecies 



Clypeaster subdepressus (Gray) 



Clypeaster rosaceus dalli (Twitchell) 



Rhyncholampas ayresi Kier, new species 



Agassisia porifera (Ravenel) 



