2tt 
Additional notet Th® spa si mans from Serro Colorado » Arabs# 
dssarvs special notice* Th© corallitss are circular in cross 
section, and have a diamstor of a centimeter , sometimes slightly 
greater* Th© distance between them is 3mm. ©r ©wen greater. 
Endotheca and ©xothsca are very richly developed. The septa are 
usually 24 in number, alternately larger and smaller# all of th® 
larger reach the columellas occasionally ©mil quaternaries. They 
are thin, but are thickened at the wall sufficiently to fora a so* 
called "pseu&oiheeu. ” There are two specimens of this coral from 
Serro Colorado, on© of which is completely silieifted, and a large 
portion of the other has undergone sllicif ication. The cblumelXa 
is lax, spongy, and fairly largo, occupying about one* third of the 
diameter of the coral lit® entity. These specimens closely resemble 
Duncan's var. interned la , but have somewhat larger corallites; they 
are very near 0. coat at a (Duncan), from which they differ by having 
thicker septa and a larger columella} 0. ant ilia rum differs by its 
somewhat smaller corallites} I can discover no noteworthy differ- 
®ao® from j). insignia Duncan* These specimens# particularly when 
taken in connection with the other material that I have studied, 
lend strong support to placing each of the names fust mentioned in 
\ ■ 
th® synonymy of CU cavernosa . 
