A gpa ci man from Port Gastric®, Santa Lucia, shows a variation worthy, 
of not®* In all of the variations so far doscrlfesd, the pel mry and 
secondary septa ar® constantly ©qusal, uniformly reaching the columella. 
In the Santa Lucia specimen a secondary septum Is sometimes shorter than 
and thinner than a primary ; beside© in some calica® there are as many 
as 30 septa, this specimen is of Importance for comparison with Fhylla- 
coenia ooulpta var. tegula iMacan and lohlnopora f ranks | Gregory, 
these remarks cover the variation of the resent specimens that ! 
have actually been abl© to study, Fcmrtales, Terrill, and Guerdon, how*, 
ever, have added other observations, 
Pourtal®® says if the specie®? tt Th© same remarks about variation, 
given under the head of 0. cavernosa , can be applied to this species; 
there are very fin® examples in the Museum of the groat variation of 
form of the salicles is the same specimen, 
"It is very common la Florida on the reef and in the channels, and 
fora# large hemispherical Bjacsss nearly up to low-water mark, fh® cen- 
tral and highest part often dies out from feeing left uncovered at very 
low tide and the mass then assume© an annular form through th© decay of 
y 
the dead part, ” 
l / 111, Gat, | Hus* Comp. Zool. IT, p. 72, 1371. 
Verrill writes? "It s-^ows considerable variation in the sis© of the 
salicles; in th© extent to which they are crowded together; in the promi- 
nence of their borders above the intervening ©xotheca; in th© prominence 
of the septa above the walls; and in th® extent to which th# small septa 
of th# third cycle are developed. But yet these variations, so far as 
