Astrae* actigweneis Dun car differs fro® th© usual recent specimen© 
of th© species by having the tertiary septa & little ©mailer than th® 
primaries and secondaries* Duncan states that **The primary and sec- 
cadary septa have a tooth near the © oluaseila. * Th® specimen from 
Dares , Porto Rico, represented by PI. , fig. , seems almost 
typical antigusnaisi the type is represented by PI. , fig. • 
Act rasa rad lata v&r. intermedia Duncan is, according to its origi- 
nal description, eft&r&st erised by '‘having the third cycle of septa com- 
plsto, and a little excess of vesicular endotheea. * # * Th® variety 
forms a link between the great Astraoans of th® Hiocsn© of th© Antilles 
and th® existing Astrasa radiate, of the Caribbean Sea, Astras* antillarum 
being closely allied to it.** Th© type specimen, Geological Society 
of London, is represented by PI. , fig. . Thar® arc in places 
indications of small costa® between the larger ones, similar teethes® 
of 0. endothssftts t and there are a few quaternary septa. 
Astras* brevis Duncan Is a variation of 0. cavernosa with coral- 
litss about 5 mm* in disaster, and rather elevated calicos. The type, 
Geological Society of London, is represented by PI. , fig. • 
Bel fast rasa aperta Terrill, from Brasil , is especially character- 
ised by having the principal sept®,, i. e» , those of the first ,' second, 
and third cycles, all of which ordinarily reach th© co luma 11a, taller 
and thinner than is usual in 0. caverno sa. 
Orb i salla cavernosa var. compact® Taugh&n has solid ©xotheca, low 
mammilla t® corallltes, and equal costa®, Recent on the Brasilian coast, 
Let. 12° 48 * S. Long. 3S® f . , 27 fathoms. 
