MUSEUM OF COMPARATIVE ZOOLOGY. 51 



the edges evenly dentate, with large, regular, acute teeth ; latest ones 

 narrow and thin, deep between the larger, the edges scarcely divided. 

 Lower surface crowdedly costate, the costae unequal, covered with obtuse 

 papilliform spines. This species is allied to F. repanda, but is very distinct 

 in the character of the septa. — Zanzibar; C. Cooke, E. D. Ropes. 



Fungia serrulata Verrill. 



Corallum somewhat convex in the centre; fosse very narrow. Princi- 

 pal septa subequal, much narrower than in the preceding, the edges 

 irregularly dentate, with small, very acute, unequal teeth ; latest septa 

 thin, much more narrow, the edges finely and regularly denticulate. Lower 

 surface with the principal costaj about .5 of an inch distant, and many other 

 finer ones between ; all of them covered with prominent, obtuse, papilliform 

 spines. — Kingsmills Islands ; A. Garret. 



Fungia Haimei Verkill. 



Syx. Fungia discus M. Enw. and IIaime, 1851 (non Daxa). 



This species differs from F. discus Daxa, of which the original specimen 

 is before me, in having stronger and nearly equal costae, furnished with 

 numerous sharp, curved spines, instead of scattered, irregular, obtuse ones, 

 nearly obsolete on the central portion, and in having more equally devel- 

 oped septa, which are more finely and regularly serrated with small, acute, 

 angular teeth. — Zanzibar ; C. Cooke. 



Fungia valida Verrill. 



Nearly circular, elevated at the centre. Septa very unequal, the 

 principal ones very broad and thick, the last narrow and thin, all except 

 those of the latest cycle strongly serrate with very large, broad, acute 

 teeth. Costte very unequal, the principal ones thick and prominent, with 

 numerous strong, acute, often curved spines ; between these are from three 

 to five, scarcely distinct, except near the edge, and not spinose. Columella 

 fine spongy. — Zanzibar ; C. Cooke. 



Ctenactis Agassiz, MS. 18G0. — Type, Fungia echinata Pallas. 



This genus includes besides Fungia Elirenbergii Leuckart, and F. 

 crassa Daxa, the following : — 



Ctenactis gigantea Agassiz, MS. 



Syx. Fungia gigantea (var.) Daxa, Zoophytes, p. 303, pi. 19, tig. 12. — 

 Feejee Islands ; J. D. Dana. 



Ctenactis echinata Agassiz, MS. i860. 



Syx. Fungia echinata Pallas, 17GG ; Fungia pectinata Eur. ; Dana ; 

 Fungia Elirenbergii (pars) Daxa; Fungia echinata M. Edw. and IIaime. 

 — Singapore ; Capt. \V. II. A. Putnam. 



