Cyph$stra*a carlbasa (Duchassaing and llichsloitl), 
Corallum forming spheroidal or dome-shaped masses, sometime® as 
much as a foot, or sven more, in diameters the outer surface uniform- 
ly rounded or with gibbosities. 
The' succeeding portion of th© description is based upon a single 
head- shaped specimen, 15.3 eia. tall, greater diameter 12.8 cm., lesser 
XI cm. 
The calicos have very slightly elevated margins , and thin a oral - 
lit© walls. Diameter from 2 to 2 . b mm. Distance apart from ,75 to 
about Z g)suj usually about 1 mm., or half the diameter of the calico®. 
The depth o? the c&licular fossfcfi can not ba determined with certainty 
as the specimen is worn; where it is best preserved they are shallow. 
Th© coral! its walls externally are co state, a costa corresponding to 
each septum; the costa©, however, are short, those from on© a oral lit* 
not extending t© those of the next. Between th© corallite© ar® thin- 
walled ©xothecal vesicles, which have a horizontal/ stratified arrange- 
ment (see FI. , fig. ). Th© outermost exothecal platform may 
show costal ctriations. 
The septa are thin, somewhat thicker at th© wall; uniformly in 
three complete cycles; primaries and secondaries equal and reaching 
the columella; tert iarics only about half a© longj thinner, inner 
margin© free. Rather wide, thin pall occur before th© first, and 
second cycles. Th© »©ptal faces are finely granulate, with th© gouts© 
of ths trabeculae indicated; no perforations could be discovered. 
Thin end ot he cal dissepiments present. Columella poorly developed, 
rather small and lax. 
