NO. 5 TERTIARY ECHINOIDS FROM FLORIDA — KIER IO. 



tubercles are significant, there is some overlap, and some of the speci- 

 mens are intermediate between the two taxa. It is for this reason, 

 together with the great similarity between the taxa in all their other 

 features, that these taxa are herein subspecifically rather than specifi- 

 cally distinguished from each other. 



Occurrence. — Caloosahatchee formation, loc. 2, 6. Tamiami for- 

 mation ("Buckingham" facies), loc. 20. 



Types. — Holotype, U.S.N.M. 648149, loc. 6; figured specimen 

 U.S.N.M. 648150, loc. 6. 



ECHINOMETRA LUCUNTER (Linnaeus) 



Plate 3, figure 2; Plate 4, figures 1-3 



Echinus lucunter Linnaeus, 1758, Systema naturae, ed. 10, p. 665. 



Echinometra lucunter (Linnaeus). Mortensen, 1943, Monograph of the Echi- 



noidea, vol. 3, pt. 3, p. 357. (See this work for the pre-1943 references to this 



species.) 

 Echinometra lucunter (Linnaeus). Caso, 1948, Inst. Biol. Mexico, vol. 19, p. 199, 



figs. 10-11. 

 Echinometra lucunter (Linnaeus). Dartevelle, 1953, Ann. Mus. Congo Beige, 



vol. 13, p. 38, figs. 7-8, pi. A, fig. 5, pi. i, figs. 4-6. 

 Echinometra lucunter (Linnaeus). Clark, 1954, Bull. U.S. Fish Comm., vol. 55, 



p. 374. 

 Echinometra lucunter (Linnaeus). Clark, 1955, Journ. West Afr. Sci. Assoc, 



vol. 1, p. 52. 

 Echinometra lucunter (Linnaeus). Bernasconi, 1955, Biol. Inst. Oceanogr. Sao 



Paulo, vol. 6, p. 62, pi. 2, figs. 1, 5. 

 Echinometra lucunter (Linnaeus). Tommasi, 1957, Pap. Dep. Zool. Sec. Agric. 



Sao Paulo, vol. 13, p. 29, figs. 16, 20, pi. 1, figs. 4, 6. 



Remarks. — There are seven specimens which can be referred to 

 this species. Although the fossil specimens are only slightly elongated, 

 whereas in most of the Recent specimens the test is greatly elongated, 

 this difference is not considered significant. According to Clark 

 (1954, p. 374, footnote), Recent specimens are commonly circular 

 in outline in the western part of the Gulf of Mexico. 



Ecology. — This species is usually found living on rocks in the lit- 

 toral zone. 



Distribution. — This species is found living today in the West Indies 

 from Florida to Brazil and off the west coast of Africa. Arnold and 

 Clark (1934, p. 140) report it as a fossil from Jamaica, and Darte- 

 velle (1953, p. 38) found it in the Pleistocene of Angola. 



Fossil occurrence in Florida. — Caloosahatchee formation, loc. 6. 



Types. — Figured specimens, U.S.N.M. 648152-3, loc. 6. 



