MUSEUM OF COMPARATIVE ZOOLOGY. 43 



Dana, together with the following. The existence of generic characters 

 distinct from Poi-ites in these species was suggested by Milne-Edwards, 

 although he had not been able to examine specimens of them. 



Synarosa Dana? Verrill. 



Syx. Ponies contigua Dana ; Pontes Dance M. Enw. and IIaimr. 

 Feejee Islands; J. D. Dana. 



Synarsea irregularis Verrill. 



This species forms large irregular masses, consisting of numerous angular. 

 clavate, uneven and crowded branches, often nodose at the ends, and much 

 coalesced, giving a rough, eroded appearance to the mass. Cells, huge-, 

 than in the following species; pali prominent, slender; columella rudimen- 

 tary, often wanting. Surface covered with slender, prominent, otter. 

 toothed granulations, which are rather loosely arranged. Color, deep um- 

 ber brown. — Sandwich Islands ; A. Garret. 



Synara?a convexa Verrill. 



Corallum forming rounded hemispherical clumps, composed of numerous 

 closely crowded, slender branches, very much divided, angular, and often 

 flabelliform at the summits, much coalesced near the ends, leaving the tips 

 free for about one third of an inch. Cells closely arranged even on the sides 

 of the branches, small and shallow; pali short, thick, obtuse, surrounded by 

 short, obtuse granulations, which are crowded over the whole surface be- 

 tween the cells. Color, dark ash. — Society Islands ; A. Garret. 



Synaraea solida Verrill. 



Corallum convex and glomerate, arising from a narrow base, formed 

 by numerous very irregular stout branches, coalesced nearly throughout 

 into a solid mass, leaving only the ends free for about half an inch ; these 

 are often one half an inch thick, angular and proliferous. Cells rathe: 

 open and distinct, numerous; pali distinct, not very prominent; septa 

 apparent, but imperfect; columella generally wanting; granulations of the 

 surface rough, irregular, not crowded. Color, grayish brown. — Society 

 Islands ; A. Garret. 



Alveopora excelsa Verrill. 



Coral incrusting at base, massive, gibbous, rising into long subcylindrical 

 lobes, rounded at the summits. Cells deep, neatly polygonal, nearly uni- 

 form in size, averaging about .08 of an inch in diameter, with, occasionally, 

 much larger ones intermingled; septa in two cycles, represented by twelv< 

 vertical series of slender spines, uniting at the middle into a loose rudimen- 

 tary columella; walls thin, pierced by numerous rounded pores. — Singa- 

 pore ; Capt. W. II. A. Putnam. 



Alveopora retusa Verrill. 



Corallum irregularly lobed or gibbous; the lobes thick, clavate, often 



