PARACYATHUS. 11 



PARACYATHUS M.-Edw. & H. 

 Paracyathus confertus Pourt. 



Paracijathux coiifcrtux Pourt. Bull. Mus. Comp. Zobl, No. 7. 



Plate VI., figs. 11, 12, and 13. 



Corallum turbinate, |ie(licellate ; costse distinct to the base, not 

 prominent, granular. Calicle oblong, concave. Septa crowded, thin, 

 entire, slightly exsert, in five cycles, but with considerable irregularity 

 in some of the systems. Pali numerous, difficult to distinguish from 

 the papilla? of the columella. 



Like Caryophyllia, this genus presents so many points of variation 

 that it is very difficult to define a species. I have i-etained the above 

 name provisionally, not having been able to make direct comparisons 

 wdth European specimens, with which I have little doubt it will ulti- 

 mately be identified. Specimens of a Paracyathus from the Azores do 

 not differ from mine. 



OffTortugas, in 3G, 37, 60, and G8 fathoms. 



Ofi' Carysfort Reef, in 52, 60, and 63 fathoms. 



Off Conch Reef, in 60 anil 77 fathoms. 



Off Alligator Reef, in 79 fathoms. 



Otf The Samboes, in 'J3 fathoms. 



Off Sand Key, in 125 fathoms. 



Off Double-Headed Shot Key, in 315 fathoms (dead). 



Paracyathus? folliculus Pourt. 



Paraa/allius? folliculus PounT. 



StephanophijIUa folliculus Pourt. Bull. Mus. Comp. Zobl., No. 7. 



Corallum free, without mark of adherence, broader at the base 

 than at the calicle. Costas broad, granulated, flat, nearly meeting 

 at the centre of the base ; the primaries continuous, the tertiaries 

 united to the secondaries. Intercostal furrows naiTOW. Calicle cir- 

 cular or subhexagonal, slightly concave. Septa in six complete sys- 

 tems and three cycles, covered with large tubercles, not exsert (in the 

 only specimen obtained the edge of the septa, and the summit of the 

 pali and of the columella, appear to have been injured or abraded 

 durmg the life of the animal). The primaries and secondaries meet 

 in the centre with an indistinct columella, the tertiaries connect with 



