NO. 5 TERTIARY ECHINOIDS FROM FLORIDA — KIER 29 



Variation. — This subspecies, as is also true of the nominate sub- 

 species, is very variable in many of its features. The test varies in 

 shape, from low to highly inflated, with angular to rounded marginal 

 outline. The petals may be highly inflated or only slightly inflated. 

 In the apical system, all the genital pores may be widely separated 

 from the madreporite, or any number of them may be in contact with 

 the madreporite. The characters which do not vary are the outline 

 of the petals, the position and size of the periproct, and the extent 

 of the depressed area around the peristome. 



130- 





120 



t* 00 



110- 

 100 





co 90- 

 cr 



£80- 

 ^ 70- 



+ ^ 



~ oeP 



O 

 O 



2 



z 60- 





fe 50- 

 ^ 40- 





30- 





20 





10- 



+ CLYPEASTER ROSACEUS DALLI 



CLYPEASTER ROSACEUS ROSACEUS 



10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 

 LENGTH IN MILLIMETERS 



Fig. 23. — Clypeaster rosaceus (Linnaeus). Width of the test relative to length. 



Comparison with other species. — This subspecies is distinguished 

 from the nominate subspecies by its wider test. In all other features 

 these specimens are indistinguishable from the nominate subspecies. 

 Although there are some specimens of C. rosaceus rosaceus that are 

 as wide as specimens of C. rosaceus dalli, most of them are narrower 

 (see graph in text fig. 23). I have examined the specimen that Jack- 

 son referred to Clypeaster dalli and it can not be distinguished from 

 the Caloosahatchee specimens. Jackson states that his specimen came 



