A. E. Verritt — Bermudian and West Indian Reef Corals. 139 



Echinopora concinna Ver., sp. nov. 



Plate XXIX. Figure 4. 



The coral forms large, thin, foliaceous, bent fronds, a foot or more 

 across, becoming very thin but firm at the edges. Both surfaces 

 bear similar calicles in the type. 



The septo-costae are fine, very regular, only slightly raised, and 

 each bears a row of regularly spaced, not crowded, small, erect, 

 rough spinules, which give a neat and very regularly spinulose char- 

 acter to the surface. 



The calicles are small, low, verruciform, rather open, with deep 

 and conspicuous interseptal loculi. The septa are in three cycles, 

 the smallest very thin and narrow. The larger ones are wide, 

 thickened at the walls, a little prominent, angular at the summit, and 

 lacerately toothed. 



The columella is well developed and finely trabecular or spongy. 



Diameter of calicles about 4 mm ; their height about 1 to 2 mm . 



Pelew I., — coll. Ward; Yale Museum and Field Colum. Mus., 

 Chicago. This is allied to E. striatula Studer, (Monatsb. Kong. 

 Akad. Wiss., Berlin, 1877, p. 644, pi. iii, figs. 10a, b,) from New 

 Britain. 



Family Agaricidae Ver., 1867. 



Fungidce (pars) Dana, Zooph., p. 283, 1846. 



Lophoserince (pars) Edw. and Haime, Coinpt.-rend., xxix, p. 71, 1849. Hist. 



Corall., iii, p. 35, 1860. 

 Lophoseridce Duncan, Kevision, p. 146, + Plesiofungidaz (pars), p. 133, 1884. 

 Agaricidce Verrill, these Trans., i, p. 542, 1867. 



Corals generally compound, increasing mostly by marginal bud- 

 ding, often thin foliaceous or frondose, either unifacial or bifacial, 

 sometimes in thick plates or massive. Calicles small and shallow, 

 often without definite solid walls. Septa usually numerous, low, 

 finely serrulate or subentire, more or less of them continuous, as 

 septo-costa?, with those of adjacent calicles. 



Synapticulae exist between the septa, and in thick or massive forms 

 there are also dissepiments. < )uter wall compact, imperforate, usually 

 with slender, serrulate costal striatums, seldom echinate. 



Polyps short, scarcely exsert, with small, short, verruciform, blunt 

 or clavate, or often rudimentary tentacles. 



