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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 145 



Fig. 8. — Lytechinus variegatus plurituberciilatus Kier, new subspecies: Apical 

 system of U.S.N.M. 648150, from the Caloosahatchee formation, loc. 6, X 4. 

 Genital 2 absent on specimen. 



plates in each series ; two regular series of secondary tubercles par- 

 allel to primary series in each ambulacrum ; this series extending 

 from midway between apical system and margin to near peristome, 

 in specimen 54 mm long from 25 to 31 secondary tubercles in each 

 area. 



Inter ambulacra. — Secondary tubercles well developed (text fig. 9), 

 of approximately same size as primary ; at margin in specimen 48 mm 

 in diameter one secondary tubercle adradial to primary, two admedial ; 

 in specimen 56 mm in diameter two tubercles adradial, three admedial, 

 number of secondary tubercles variable in different interambulacra 



Fig. 9. — Lytechinus variegatus plurituberciilatus Kier, new subspecies : Side 

 view at ambitus showing tuberculation in U.S.N.M. 648149, from the Caloosa- 

 hatchee formation, loc. 6, X 4. 



