68 PECTIN I A. 



Eusmilia alticostata M.-Edw. & II. 



Several specimens in the Museum from Florida agree better with 

 the description of this species than with the description ami figure of 

 Eusmilia aspera M.-Edw. £ II. I not Euphyllia aspera Dana |, of which I have 

 no typical specimens tor comparison. As suggested by M.-Edwards and 

 Haime. this may he only a variety. The columella in our specimens is 

 very little developed: tin' costae thin, foliaceous, forming a succession 

 of lobes, extending far down, very indistinctly or not at all serrate. 

 The ealieles are generally considerably smaller than in Eusmilia fasti- 

 (/iata. The differences thus appear to he more considerable than the 

 short description of Milne-Edwards and Haime would suggest. 



Florida Reef, rare ; Agassiz, Pourtales. 



DICTIOCCEMA M.-Edw. & H. 

 Dichocoenia Stokesi M.-Edw. & II. 

 D. Slob sii M.-Edw & II. A.m. S :. X.,i , :; Ser., t. X.. p. 307, PI. 7, fig. 3, 1849. 



The Museum has but three specimens of Dichocoenia from Florida, 

 which present considerable differences among each other, particularly 

 with regard to the intercalicinar surface, which in the larger specimen 

 is entirely occupied by thick granular costae, the ealieles being much 

 more crowded than in Milne-Edwards and Haime's figure. In the 

 others, which are young specimens, these spaces are coarsely granular, 

 with less distinct costae. There is also considerable diversity in the 

 development of the pali. They are all referred provisorily to the 

 above species. A specimen from Hayti resembles the figure more 

 closely. 



It is quite difficult to make use of the descriptions and figures of the 

 various species established by Duchassaing and Michelotti. which are 

 mostly based on very variable characters. 



PECTIXIA Okex. 



Pectrinia mseandiites M.-Edw. & II. 



Very rare. When examined with a magnifier, the septa are seen to 

 be distinctly though very finely serrate. 



