Verrill, Notes on Radiata. 511 



Balanophyllia Wood. 



Descriptive Catalogue of the Zoopliytcs from Crag, in Ann. and Mag. Nat. Hist., xlii, 

 p. 11, 1844; Kdw. and Ilaime, Ann. dcs sci nat., x, p. 83 ; Corall., iii, p. 99, 1860. 



Conilluin simple, usually attached by a rather broad base. Walls 

 quite porous, costate, sometimes with an epitheca. Septa thin, in 

 four or five cycles, those of the last cycles well developed, uniting 

 together in pairs in front of the preceding, which are interrupted. 

 Columella well developed, spongy, not prominent. 



Some species referred by authors to this genus have a narrow base, 

 others become free at maturity. 



Balanophyllia elegans VerrUi. 



Bulletin of the Museum of Comp. Zoology, No. 3, p. 44, Jan., 1 864. 

 Plate 10, figure 3. 



Corallum low, subcylindrical, with a broad, expanded base, often 

 somewhat enlarged toward the summit. Wall nearly compact at 

 base, quite porous above, sometimes with an imperfect epitheca 

 reaching above the middle, often naked, strongly costate, the costse 

 thick, rounded, nearly equal, roughly spinulose granulous, separated 

 by irregular, narrow, interrupted grooves, with many deep pits and 

 pores. Polyp-cell broad elliptical or circular, rather shallow. Septa 

 unequally projecting, those of the two first cycles considerably ele- 

 vated ; four complete cycles, those of the fifth usually developed in 

 half the systems and sometimes in all, in some large specimens a few 

 very small septa belonging to the sixth are visible. Primary septa 

 decidedly broader than secondary, and higher, thickened outwardly, 

 the edge rounded, nearly reaching the columella, at the summit 

 porous, roughly serrulate, and confluent Avith the adjoining septa 

 of the fourth cycle, the sides granulous; secondaries similar, but 

 narrower and less projecting, the inner edge more deeply divided 

 into slender spinose teeth ; those of the third cycle quite narrow, 

 aboiit half as broad as secondaries, not reaching the point of union 

 of those of the later cycles, and therefore leaving an enclosed space 

 of some size in front, the edge deeply divided into rough teeth ; 

 those composed of the inner portions of the third and fourth cycles 

 united are broad, reaching the columella, the edge lacerately divided 

 into rough, prominent spinules ; they are united to the piimaries and 

 secondaries outwardly and curving toward each other tmite in front 

 of the tertiaries, about midway between the margin and columella ; 

 free outer portion of the sej)ta of the fourth cycle very narrow, 

 little prominent, interrupted by a space before the point of union 

 of the thin curved septa of the fifth cycle. Columella rather small, 



