A. E. Verrill — Bermudian and West Indian Reef Corals. 83 



columella ; and the solidity or vesicular character of the collines. 

 Some of these forms are, perhaps, worthy of varietal names : 



Var. hispida (Ehr. )z:zM. prmrupta Dana {noy% Ehr.). 



The type of Dana's M. prmrupta is in the Yale Museum. It is a 

 variety of 31. areolata, with the collines mostU' solid, narrower than 

 usual, and partly sinuous. Septa rather narrow, thickened at base, 

 emarginate, hispid laterall}^ roughly serrulate ; columella largely 

 developed, finely lamellose. The collines are thin and simple in 

 some places, but double in others. The valleys are mostly broad 

 and open, 12 to 20'"™ wide, usually about 15™"' ; collines mostly 4 to 

 gmm ^^,j^|p PI xii, fig. 2, type of Dana. 



Florida Reefs. 



Var. confertifolia Y., no v. 



Plate XI. Figure 2. 



Form as usual. Collines generally wide, double, truncate or sul- 

 cate, sometimes simple, rather compact. Septa numerous and 

 crowded, alternately wider and narrower, about 11 to 12 wider ones 

 to a centimeter, not very hispid laterally, finely and pretty regularly 

 serrulate, usually wide and rounded distally, and with a broad basal 

 paliform lobe. External costre numerous, pretty evenly spinulose. 

 Columella usually well developed, spongy or finely lamellose. Cali- 

 cinal valleys wide and open, mostly about 20"™ wide, sometimes 

 25™™ ; collines mostly 10 to 12™™ broad. 



Florida Reefs. Yale Museum. 



Var. laxlfoUa V., no v. 



Plate XII. Figure 1. 



Form as usual, but generally with lobulate margins. Valleys 

 usually narrower than in the preceding variety, rather deep, often 

 with perpendicular walls. Collines short at first, but branched and 

 sinuous when older, mostly nari'ow, generally double, often becom- 

 ing simple when older, usually with very cellular exotheca. Septa 

 fewer than usual, and less crowded, about eight or nine wider ones 

 to a centimeter, with small ones alternating, so openly placed that 

 the interseptal spaces appear unusualh' wide and conspicuous, rather 

 wide and rounded distally, moderately hispid laterally, pretty evenly 

 and sharply serrulate, but the large, rounded paliform lobe is often 

 lacerate-toothed. Columella well developed, finely lamellose. Ex- 

 terior costoe prominent, sublaraellar, sharply serrulate. Valleys 

 mostly 10 to 13™™ wide ; collines 5 to 12'"™ wide. 



Florida Reefs and St. Thomas. Yale Museum. 



