Localitie s Caloosahatchi© River , Florida, Frank Burns? Shall 
Croak, Fla., Dr. Griffith? Santo Domingo, f. U. Gabto? Moan Hill, Costa 
Rica, H. Piitier. 
Geologic horigoa s The Florida specimens &r® Pliocene, andli 1® 
likely that the other® &r@ of the same age. 
Variation s Th© United States K&tional Museum possesses a very 
good suite of specimens of this species, permitting a rather satis- 
factory study of its variation. The specimen already described show® 
within itself th® limits of variation in the sisa and distance from 
one another of th® calicee. About 8 mm. Is the average calicular 
diameter. The ex o theca may be very light and delicate, or rather 
compact, even almost solid. The e©pt& vary in thickness and th© 
pall may toe strongly or weakly developed? whan strongly developed 
they ar© triangular in shape, the baa® of the triangle directed out- 
ward, and the isrtfaries may fus© to t£sa basal comer® or to th® sides 
of the pall before the secondaries. Th® thickened pall are corre- 
lated with the denser ©xothesa, the various skeletal elements sem 
to thicken together. 
Synonymy ? Of th® specie® described toy Duehassaing and Michel- 
otti , Plcsiastrea carp in® it i , Leptaat rea caritoaea , Solenagtrea mi cans , 
and Solsnaatrem olliai can confidently toe placed in this synonymy* 
The original description of IP. carplnstti is as follow®? M Th® 
form of th© corallum and lotoed? the calico® ar® small, and often 
slightly deformed with prominent margins, separated toy distinct cos- 
ta® and vesicular tissues the septa are finely denticulate and do 
not attain a length of one-third the radius of the e&llc® because of 
th® development of the pali* The last are thick,- as strong as the septa, 
