A. F. Verrill — Comparisons of Coral Faunae. 175 



Var. conigera Ver., nov. 



Oculina varicosa, var., Pourtales, Florida Reefs, pi. ii, fig. 3, 1880. 



Plate XXX. Figure 3. 



A remarkable variety, from Bermuda, has large and very prom- 

 inent conical corallites, sloping continuously from the margin of the 

 calicle to the base, with a smooth, even surface ; no costal striae. 

 Their bases are in contact and they stand out at nearly right angles 

 to the branch. The calicles are small and contracted, rather shallow, 

 with 24 thin, unequal septa, those of the third cycle being very 

 narrow and thin. Pali small ; columella poorly developed. Only 

 one branch is in the collection. A larger specimen has been well 

 figured in the Report on Florida Reefs. 



Oculina diffusa Lam., 1816. 



Oculina diffusa Dana, Zooph., p. 397, 1846. Edw. & Hairne (pars), Corall., 

 ii, p. 107, 1857. Pourtales, Reef Corals, p. 65, 1877; Florida Reefs, pi. iii, 

 figs. 10-13, 1880. Quelch, op. cit., p. 47, 1886, descr. 



Oculina diffusa Vaughan, op. cit., p. 294, pi. i, figs. 5, 5a, 1901. 



Ivory Coral. Bush Coral. 



This is the most abundant species, both here and at the Florida 

 Reefs. It usually forms densely branched clumps, with numerous 

 slender ascending branchlets. But it also grows in open, arbores- 

 cently branched forms. The calicles are rather large, usually 3 to 

 4 mm in diameter. The corallites are more or less prominent, becom- 

 ing oblique toward the tips of the branches, but on the larger 

 branches they may be surrounded by a depression and outer ridge, 

 or become circumvallate. The septa are usually 24, rather narrow, 

 little exsert. Columella well developed. 



Oculina pallens Ehrenberg. 



Corall. Rothen Meeres, p. 79, 1834. Dana, Zooph., p. 67, fig. 29, p. 395, 1846, 

 Pourtales, Reef Corals, p. 66, 1877; Florida Reefs, pi. iii, figs. 14-17, 1888. 

 Quelch, op. cit., p. 48, 1886, (descr.). 

 f Oculina speciosa Edw . & Haime, Monog., p. 67, pi. iv, fig. 1, 1850; Hist. 

 Corall., ii, p. 106, 1857. Quelch, op. cit., p. 50, (descr. and notes on the 

 original type, examined). 



Ivory Coral. Tree Coral. 



This forms rather handsome arborescently branched coi - als, about 

 a foot high, with the branches rather few, long, divergent, and 

 tapered. The coi'allites are of medium size, 2.5 to 3 mm in diameter, 



