MUSEUM OF COMPARATIVE ZOOLOGY. 45 



umella, more conical and less open cells, and the six primary septa much 

 broader and thicker than the others, with rounded nearly entire edges. — 

 Society Islands ; A. Garret. 



Stylopkora digitata M. Eow. and IIaime. 1850. 



Svx. Madrepora di/jitala Pallas, Elench. Zooph. p. 326, 17(36 ; Pon- 

 tes scabra and elongata Lamk. 181G; Sideropora dirjitata and elonoa'a 

 Blaixvillk, 1830; Dana. 184G; Pontes die/data Km:. 1834. — Singa- 

 pore; Capt. YV. II. A. Putman. 



Stylophora Danae M. Edw. and IIaime, 1850. 



Syx. Sideropora palmala Dana, 1846 (non Lamk.). — Singapore; 

 Capt. W. II. A. Putnam. 



This approaches the preceding very closely in some of its forms, and may 

 not lie distinct. 



Stylophora stellata Verrill. 



Corallum forming even rounded clumps, a foot or more in diameter, con- 

 sisting of numerous, evenly crowded branches, which are rounded, about 

 one half an inch in diameter, furcate, often flattened at the ends. Cells 

 evenly crowded over the surface, arranged somewhat in spiral lines, the 

 upper edges prominent, rather stout. Septa forming three cycles, the last 

 two often rudimentary or wanting ; primary septa a little exsert, rather 

 narrow, the inner edges vertical, scarcely traceable to the columella, which 

 is small, papilliform. This species resembles S. dirjitata in form, but the cells 

 are entirely different. — Kingsmills Islands ; A. Garret. 



Madracis decactis Verrill. 



Svx. Astrea decactis Lymax, Proc. Bost. Soc. Nat. Hist. YI. p. 260, 

 1857. — Florida ; L. Agassiz. 



Stylaster roseus Grav, Zoiil. Misc. 1936. 



Svx. Madrepora rosea Pallas, 1766 ; Ocidina rosea Lamk. 1816 ; Allo- 

 pora rosea Daxa, 1846; St faster roseus Agassiz, Florida Reefs, with fig. 

 (unpublished). — Florida; L. Agassiz. 



Stylaster elegans Verrill. 



Corallum flabelliform, the principal branches large, compressed, rapidly 

 dividing into smaller branches and branchlets, the ultimate division-; very 

 slender and delicate, rarely coalescent. Cells very small, a little promi- 

 nent, mostly arranged on the ed^es of the branchlets, but a few are scat- 

 tered over the sides; septa narrow, about sixteen distinct; columella 

 minute, styliform. Color, bright rose, lighter on the large branches. — 

 Ebon Island ; A. Garret. 



Stylaster tenuis Verrill. 



Corallum similar to the preceding in its mode of branching, but the 

 branches are not compressed. Cells one third larger, about .02 of an inch in 



