NO. 5 TERTIARY ECHINOIDS FROM FLORIDA — KIER 1 5 



Tamiami formation, barnacle-echinoid-oyster f acies : Loc. 26, 29, 

 30. 



Unnamed late Miocene formation : Loc. 33. 

 Type.— Holotype, U.S.N.M. 648133, loc. 20. 



LYTECHINTJS VARIEGATUS VARIEGATUS (Leske) 

 Plate 2, figure 3 



Cidaris variegata (part) Leske, 1778, Klein's Naturalis dispositio Echinoderma- 



tum, p. 149, pi. 10, figs. B, C. 

 Lytechinus variegatus (Lamarck). Mortensen, 1943, Monograph of the Echi- 



noidea, vol. 3, pt. 2, p. 437, pi. 24, figs. 1-9 ; pi. 25, figs. 1-12, pi. 53, figs. 1, 6, 



7, 11, 13. 

 Lytechinus variegatus (Leske). Cooke, 1959, U. S. Geol. Surv. Prof. Paper 



321, p. 15, pi. 2, figs. 12, 13. 

 Lytechinus variegatus (Leske). Cooke, 1961, Smithsonian Misc. Coll., vol. 142, 



No. 4, p. 10, pi. 5, figs. 1-2. 



A detailed description and synonymy are given by Mortensen 

 (1943, pp. 437-446). This species occurs today in the West Indies, 

 extending as far north as North Carolina and as far south as Brazil. 

 It was previously known as a fossil from the Pliocene San Gregorio 

 formation in Venezuela (Cooke, 1961, p. 10). The San Gregorio 

 specimens appear to be slightly different and may not belong to this 

 subspecies. Cooke reports this subspecies from deposits in South 

 Carolina which he considers to be Pleistocene. 



Ty/>e.— Figured specimen, U.S.N.M. 648151. 



LYTECHINUS VARIEGATUS PLURITUBERCULATUS Kier, new subspecies 

 Plate 2, figures 1, 2; Plate 3, figure 1 ; Plate 4, figure 4; text figures 8-11 



Diagnosis. — Distinguished from nominate subspecies by more nu- 

 merous tubercles in ambulacra. 



Material. — Two specimens from the Tamiami formation; 13 from 

 the Caloosahatchee. 



Shape. — Size moderate, varying from 48 to 56 mm in horizontal 

 diameter, height varying from 55 to 60 percent (average 57) of 

 the diameter; marginal outline circular to subpentagonal ; peristome 

 depressed. 



Apical system. — Partially preserved on only one specimen (text 

 fig. 8), genital plates of different size, genital 5 smaller than others; 

 ocular plates I and V broadly insert, other oculars exsert. 



Ambulacra. — Ambulacra moderately broad, approximately 60 per- 

 cent width of interambulacra, in specimen 54 mm in diameter 36 



