44 VERRILL, SYNOPSIS OP 



longer diameter, and having a basal attachment a qiiarter 

 of an inch across. The upper surface is irregularly oval ; 

 central fosette oblong, very deep ; septa thick, finely toothed, 

 Locality doubtful. Dr. Win. Stimpson. 



CTENACTIS (Agassiz, MS.) Verrill, Bulletin Museum 

 of Comparative Zoology. 



A very young specimen of an undetermined species, 

 about one and a half inches in diameter, attached below for 

 about a quarter of an inch, with a very thin, compact wall, 

 spreading horizontally, with thin, rather distant and finely 

 dentate costae. Upper surface broad oval. Septa very 

 thin, the six primaries prominent, inner edge perpendicular, 

 and, like all the rest, with long, irregular, often lacerate 

 teeth, the one nearest the inner edge broader and paliform. 

 In the lateral systems there are but five cycles of septa, 

 the fifth rudimentary, but in those of the ends there are 

 representatives of seven cycles. 



Japan. Dr. Wm. Stimpson. 



FAMILY, LOPHOSERID^E Edw. and Haime, emend. 







PAVONIA FOLIOSA Verrill, nov. 



A species growing in clumps of thin, contorted, crispate 

 plates, which are loosely coalescent throughout ; surfaces of 

 the plates carinated or cristate near the edges, which are 

 thin and acute. Cells small, shallow and open, not crowd- 

 ed, .2 to .3 of an inch distant. Septa in two cycles, with 

 members of a third cycle in some systems; larger septa 

 about ten, narrow, thin, with the sides strongly granulated, 

 alternating with these are other very delicate ones. Colu- 

 mella rudimentary. 



Color of unbleached corals light yellowish brown ; height 

 four inches; average thickness of plates .1. 



Ousima or Loo Choo Islands. Dr. Wm. Stimpson. 



This species is allied to P. frondifera from Singapore, 

 but is more delicate, with thinner and smaller plates, and 

 with much smaller, more shallow and open, and less crowded 

 cells. 



