MADREPORARIA OF THE DEEP SEA. 241 
the closest resemblance was noticed between it and those described and figured as Para- 
cyathus striatus, Philippi. A specimen of this species is in the collection of corals now 
under consideration ; and as it is in a good state of preservation, it is delineated with 
the Paracyathus from 50-100 fathoms dredged by the Gulf-Stream Exploration Survey. 
The American form has four perfect cycles and none of the orders of the fifth cycle ; it 
has 24 single-lobed tall pali, of which the tertiaries are the largest; the columella is 
deeply situated, and its papille are distinct and much smaller than the pali. The 
columella is oval and moderately large; and the cost are subequal, rather flat, varnished- 
looking, and minutely cross-grained. (Plate XLIV. figs. 4-7.) 
The Mediterranean forms are like the American, with the exception of the costal 
structures, which in the first are more prominent, less glazed, but still granular. There 
are four cycles of septa. (Plate XLIV. figs. 8-10.) 
I propose, then, to include the coral so kindly given me by Count Pourtales with the 
Mediterranean Paracyathus striatus, Philippi, sp. 
PARACYATHUS MONILIS, sp. nov. (Plate XLIV. figs. 11-13.) 
The corallum has a broad base and open calice, which is not very shallow. The coste 
are visible to the base in series of raised lines, with a row of large sharp granules. 
The columella is formed by a twist of ribbon-shaped sclerenchyma, and is small. 
The septa are not crowded, are distinct, and the primaries are the largest and the most 
exsert. They extend far into the fossa; there are four incomplete cycles, and all the 
lamine are granular, The smaller septa are rather wavy, and correspond to cost 
larger than themselves, which do not reach far down. The pali are long, narrow, not 
prominent, and are placed before the tertiaries and some secondaries where the cyclical 
arrangement is incomplete. In young specimens with 24 septa the pali are placed before 
the primaries. 
Height 2; inch; breadth of calice =; inch. 
Locality, 60 fathoms, seven miles off Rinaldo’s Chair, Mediterranean. 
PARACYATHUS INORNATUS, sp.nov. (Plate XLIV. figs. 14-16.) 
The corallum is short, and the base is almost as wide as the calice. The coste are 
absent, and are replaced by a plain glistening pellicular epitheca, marked with in- 
distinct shagreen-looking granulations. The septa are not exsert, are numerous, 
slender, wavy, not crowded, and very unequal. Those of the last cycle are simple pro- 
jections from the wall. The tertiaries project more inwards, and have a small palus 
before them as thin as they are. The secondaries are not to be distinguished from the 
primaries, are granular, and have a papilliform palus. 
The columella is very small and trabecular. 
Height 345 inch; breadth 3/5 inch. 
Locality, Mediterranean Sea. . 
