38 VERBILL, SYNOPSIS OP 



the cell, which is open and deep, having a minute conical 

 columella at the bottom, usually visible only in a section. 



Color light minium red. 



California, in deep water. Mr. Rich. Collection Yale 

 College Museum. 



This is an interesting representative of a genus, hitherto 

 but little known ; the original species described by Ehren- 

 berg (Allopora Oculina) being represented only by a single 

 specimen from an unknown locality. 



The genus is quite distinct from Stylaster and Disticho- 

 pnra,* to both of which it is nearly allied. From the for- 

 mer it differs in the scattered arrangement of the cells and 

 the small number of septa, as well as in mode of growth 

 and other characters. 



CYCLOPORA genus nov. 



Corallum branching in a plane. Cells open and deep, 

 arranged in series on the sides of the branches, with two 

 cycles of septa more or less complete, without an apparent 

 columella. Septa united together by their inner edges, so 

 as to form a ring surrounding the central space and cutting 

 off the interseptal chambers. 



This genus is intermediate between Stylaster and Distich- 

 opora in the structure of its septal system, but has more 

 open cells then either. 



Type Cyclopora bella Verrill. Aliopora bella Dana, 

 Zooph. page 696. Plate 60, fig. 6. 



FAMILY, EUSMILLID^E. 

 EUPHYLLIA UNDULATA Verrill, nov. 



Corallum forming open clumps, of rather long, angular, 

 irregular, often bent and compressed branches, the corallites 

 dividing rapidly and generally completely, and diverging at 

 a large angle. Exterior irregularly costate to near the base, 

 the costae very unequal and little prominent except near the 



#For comparison of Stylaster and Distichopora see Bulletin Mus. Comp. 

 Zoology, No. 3, by A. E. Verrill, page 46. Cambridge, 1864. 



