Remark© on the synonymy of 0* cavernosa .- The a&raei® Q« radiata 
(SI!* & Sol.) * £. argue (Lara.)* £. conferta Mi In® (Edwards & Hairaa) * 
Ov ©ndothsca (Duncan), £. cylindrica (Duncan), £. aatl^uaaals (Duncan), 
£. radiata v&r. intermedia (Duncan) » £. brevis (Duncan), 0. apart a V@rril|, 
£, oavsrno** var. hirta Verrill , and 0. compacts Rathbun m®« , are defi- 
nitely placed in the synonymy of £. cavernosa , and It is thought prob- 
able that 0. antillarum (Duncan), 0. costata (Dunc^ji), 0. ins ignis 
(Duncan) and £. braslliana Terrill, should be referred to it. Thee© 
named will be discussed seriatim. 
Gregory applies £. r adi&ia to the species as he considers the Lia- 
n^an definition of Mad rep ora cavernosa insufficient, an opinion with 
which I do not agree* All the L.inndTban descriptions are unsatisfactory, 
S 
but in this instance he refers to the figures of Laba , places the Mad- 
repora astroitea of Fallas in it® synonymy, and states "Habitat in 0# 
Americano.” Taking all things together, the original diagnosis with 
the rsfer«4f«» sea® to me sufficient for purposes of identification,- 
in fact., the brief Latin description is not bad. £-. radiata was sup- 
posed to differ from £. cavernoga by possessing only three cycles ©f 
septa. Pourtales states in the quotation already made from him, that 
"In worn specimens bh© last cycle disappears first, for that reason 
probably Orbicolla ( Mad rep ora ) radiata Ellis ha© been characterised 
by Milne- -Edwards and K&im© as having but three cycles#” 
Lamarck*® Aatrea argue is a new name for the Mad rep ora cavernosa 
Esper, The reason for his giving it is not evident# 
The specimen identified by Ihrenberg a@ Explanaria argue , which i$ 
the type of Milne -Edwards and Haims Astras confarfca , is in th© Berlin 
Museum furHaturkunde , and th© following note® ar© based upon its 
