I hare seen* mv@r go to far as to rehder difficult ths recognition 
of the species unless tfe® specimen® are badly worn. 
* ♦«■»#**#***♦ *#■*»«•* **■*-#**#*'*>*'##***# 
"Whan cell grown it form® hemispherical or spheroidal ©asses, 
tip to S foot or more In diameter* Bat it also grow® in irregular, 
inemstSag plat®.#*, and sometii&e® in nodoso or Xobulate mesos, or 
y 
©ran in branched form®*” 
1/ Trans. Conn. Acad* Soi. , rol. XI, pp* tS f 96* 1$02. 
Duerden* in describing spacim ®ns from Jamaica, sayai "Th® specie® 
occurs on coral area® in small or large, fixed* nearly spheroidal ©ass-* 
as; also a® an incrustation occupying areas several feet across. 
-fiaall isolated colonise are sometime® conical. In place® it is an in* 
y 
pertant constituent of the roofs.” 
2/ West Indian Madreporariaa Polyps, Mem. Nat. Acad. Soi., vol. ?III, 
p* 364, 1903. 
The foregoing description® and notes will indicate that w© have 
considerable information on the variation of the specie®, hut excepting 
on® note by Pourtalsa* wa have no data relating to #5® effect of environ-- 
mm t on variation. 
Variation of Fossil Specimens. 
There arc specimen®, particularly those of known Pleistocene ago, 
similar t© the typical fom of the species* except thsro may be varl* 
atioa® in the sis© of the cal ices; t|oes of a specimen fro© Fort Nassau , 
Curacao* rang© fro© 3 fro 4.3 m a. in diameter* measured between thecal 
