MUSEUM OF COMPARATIVE ZOOLOGY. 137 



we leave out from their generic characters the absence of ampullar. The 

 two genera Stylaster and Allopora are, however, very closely allied, and in 

 very young specimens the difference in the mode of germination is hardly to 

 be distinguished. 



Distiehopora foliacea Tourt. 



Corallum branching, flabellate, much compressed, finely striated and 

 granulated. The calicles in a somewhat irregular row a little on one side 

 of the edge, which is sharp and finely serrated. One of the rows of lateral 

 pores on the summits of the denticulations, the other not well defined, rep- 

 resented by scattered tuberculated pores. The plane towards which the 

 calicles are situated is thickly studded with ampulla?, each of which has a 

 small lateral opening. They are less numerous on the other surface. Co- 

 lumella deep-seated, but long, hirsute, in the shape of a pointed club. Color 

 orange pink. Height about 2 inches ; breadth of the branches about ^ 

 of an inch ; thickness ^V °f an inch. 



This species differs from D. sulcata Pourt., from the coast of Cuba, by 

 its smaller calicles not placed in a furrow, irregular lateral pores, and 

 serrated edge. 



Dredged rather frequently between 100 and 200 fathoms off the Florida 

 reef. 



Errina cochleata Pourt. 



Of the two species of Errina found quite abundantly on the coast of 

 Cuba, only this one is found on the Florida side, and that is exceedingly 

 rare, only one small specimen having been obtained in 183 fathoms off 

 Sombrero Light-house. 



Balanophyllia floridana Pourt. 



Corallum elongated, conical, straight, pedicellate. No epitheca; wall 

 porous, costate to the foot. Calicle rather deep, elliptical. Septa entire, 

 slightly exsert, finely granulated, in six unequal systems of four cycles, with 

 rudiments of the fifth in some of the systems. The septa of the fourth 

 cycle, bent and united in front of the tertiaries, and protracted as one sep- 

 tum to the columella, which is flattened and papillose. 



The polyps are red ; the mouth very Qblong ; height about 1 inch ; longer 

 diameter J, shorter -| of an inch. 



Dredged in abundance off Sand Key, Florida, in 26 fathoms. I i-efer 

 also to this species some dead and worn specimens obtained off the coast of 

 Cuba in 270 fathoms* 



* A Dendroi^hyUia was also obtained in the same dredging off the coast of Cuba, but 

 too much worn to be identified or described. 

 18 



