13-1 BULLETIN OF THE 



there are then only five pali. Columella of a single twisted lamellar process. 

 The older parts of the corallum are nearly filled up by the thickening of the 

 septa, but the process is never carried out to a total obliteration of the 

 chambers, which can lie traced in the shape of slender canals to the very 

 base. Height 1 to 14- inches; diameter rt to ^ of an inch. 



This small coral is easily mistaken for a tube of an annelid ; it is placed 

 in the genus Cccnocya thus, although I have no decided proof of its prop- 

 agation by budding ; in only one case have I found two eorallites rising 

 from a common base. 



Dredged in 1.30 to 180 fathoms off Sombrero and Bahia Honda, Florida. 



Paracyathus confertus Pottrt. 



Corallum turbinate, pedicellate. Costas distinct to the base, not promi- 

 nent, granulated. Calicle oblong, concave. Septa crowded, thin, entire, 

 slightly exsert, in five cycles, hut with considerable irregularity in some of 

 the systems. Pali numerous, difficult to distinguish from the papillae of the 

 columella. 



]t resembles P. De F'dippii, Duch. and Mich., but has a more contracted 

 base and a more elongated calicle. 



Rather rare in 50 to 100 fathoms off the Florida reef. 



Thecocyatlius cylindraceus Pourt. 



Corallum attached by a broad base, short, cylindrical. Costa? generally 

 visible through the epitheca which reaches to the border of the circular 

 calicle. Fossa shallow. Septa entire, slightly sinuous, granulated, not 

 exsert, forming six systems of four cycles; one of the systems often incom- 

 plete. Pali thick, with sinuous surfaces, fronting all the septa but those of 

 the fourth and fifth order; those of the second order largest. Columella 

 thick; formed of seven or eight papillose processes. Height ^ to f of an 

 inch, diameter about j? of an inch. 



Not rare between LOO and 200 fathoms oil' the Florida reef. 



Ehizotrochus fragilis Poitrt. 



( lorallum simple, pedicellate, straight or slightly curved, regularly conical. 

 Calicle subelliptical, deep. Six complete systems of septa, four cycles. Septa 

 very thin, not < xsert, finely granulated ; those of the first and second order 

 meeting in the centre, and united for about half their height. Costaj not 

 prominent. From the costa: of the second order rudimentary hollow roots 

 arise in pairs at about one third or one half the height of the corallum, and 

 descend along the pedicle to its fool ; they are never detached. The wall 

 and the >ept;i are very thin and fragile. Height 1 inch; greater diameter 

 |, smaller ,1 of an inch. 



