80 SIDERASTRJ5A. 



well developed, concave. Diameter of calicles 5 to 6 mm. Height of 

 corallites 8 mm. or less. 



Quite common on old corals on the Florida Reef. 



Astmngia palifera Verrill, from the East Indies, is very closely allied 

 to this species. They form a little group of passage from the Astran- 

 gi^e to the Phyllangiae, and have also affinities with the C^'licise and 

 Rhizano;ige. 



A. astrceifonnis M.-Edw. & H. does not properly belong to the reef 

 fauna, but is found to the east and west of the Florida Reef Astrangia 

 Dance Ag. is found between Cape Cod and Cape Hatteras. The differ- 

 ences between these two sj)ecies are of the slightest character, being 

 chiefly derived from the mode of grouping, which is denser in the first 

 than in the second. I am strongly inclined to believe that they will 

 ultimately be united. 



COLANGIA PouRT. 

 Colangia immersa Pourt. 

 (See Deep-Sea Corals, page 31.) 



Family FUNGID^ Dana. 



Subfamily LOPHOSERINJE M.-Edw. & H. 



The subfamily of Funginne has no representatives in the shoal-water 

 fauna of the Atlantic basin, but is represented, though quite scantily, 

 in the deep-sea region, as we have seen. The limits of the subfamily 

 of Lophoserina3 require revision ; at least it does not appear natural to 

 place in different families genera so closely allied as Fungia and Dia- 

 seris or Cvcloseris. 



SIDERASTRJEA M.-Edw. & H. 



Adrea (pars) Lamk., Oken. 



S'uleriulrea (pars) Blainv. 



Siderina Dana. 



Sklerastren M.-Edw. & H. Conipt. rend, de I'Acad. des Sc, t. XX VII., 1848 ; and Ann. Sc. Nat. 



3' Ser., t. XII., 18.50. 

 Astraia M.-Edw. & H. Hist. Nat. des Corall., 1857. 



For the reasons why the name Siderastr^ea should be retained in 

 preference to Astr£ea, see Verrill, Bull. Mus. Conip. ZooL, No. 3. 



