68 PECTINIA. 



Eusmilia alticostata M.-Edw. & H. 



Several specimens in the Mnseum from Florida agree better with 

 the description of this species than with the description and fignre of 

 Eusmilia asperd M.-Edw. & H. (not Euph>/Uia aspera Dana), of which I have 

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

 Haime, this may be only a variety. The columella in om- specimens is 

 very little developed ; the costae thin, foliaceous, forming a succession 

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

 The calicles are generally considerably smaller than in Eusmilia fasii- 

 giata. The differences thus appear to be more considerable than the 

 short description of Milne-Edwards and Haime would suggest. 



Florida Reef, rare ; Agassiz, Pourtales. 



DICHOCCENIA M.-Edw. & H. 



Dichocoenia Stokesi INI.-Edw. & H. 

 D. Slokem M.-Edw. & II. Ann. S •. Ntit, 3"^ Ser., t. X., p. 307, PI. 7, fi^;. 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 spechnen 

 is entirely occupied by thick granular costtie, the calicles 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 costte. 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. 



PECTINIA Oken. 

 Pectinia maeandrites M.-Edw. & H. 



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

 be distinctly though very finely serrate. 



