452 ZOOPHYTES. 



form, and regular, * of a line broad and 1^ to 2 lines long, thin and 

 fragile at the margin, exterior neatly striate, aperture broad and 

 circular, opening upward ; star short six-rayed. 



Plate 32, fig. 7, corallum, natural size ; 7 a, extremity of branch, 

 natural size. 



Feejee Islands. Exp. Exp. 



This species grows in small rounded clumps, consisting of several 

 branching stems rising from a common base. The long, large, and 

 thin cylindrical calicles, are attached by one side to the branch, nearly, 

 or quite to the aperture, and are evenly arranged and in contact. 

 They have a broad, flaring mouth, opening upward, and a thin 

 margin. The clump in the collections is five inches high. 



In habit, this species is between the proper cespitose Madrepores, 

 and the cespitoso-arboriform, and might, with propriety, be arranged 

 with the latter. 



HI. Caliculis validis, nariformibus out tubiformibus. 



18. MADREPORA PAXILLIGERA. (Dana.} 



M. latissima, pedicellato-cespitosa, plana, basi solida, disciformis, et 

 crassa ; infra, vix convexa, nuda, media pedicellata; supra, ramulis 

 digitiformibus 2^-3" longis, et ^-" crassis, erectis et subteretibus, 

 raro furcatis, subacutis ; margine squarroso, ramulis vix minime 

 liberis. Corallum caliculo apicali parvulo (!'" angustiore), lateralibus 

 paulum incequalibus, confertissimis, prominulis, compresso-nariformi- 

 bus, seu totidem dimidiatis, striatis, aperturd oblongd, stelld vix con- 

 spicud. 



Very broad, pedicellate cespitose, plane above ; base of the frond solid, 

 disk-form, stout ; below, scarcely convex, naked, pedicellate at 

 middle ; above, branchlets digitifonn, 2 to 3 inches long, and J to 

 of an inch thick, erect and subterete, rarely furcate, subacute ; 

 margin of the corallum squarrose, the branchlets being very short 

 and incipient. Corallum having the apical calicle short and small 

 (hardly a line broad) ; the lateral a little unequal, very crowded, 

 a little prominent, compressed nariform, or sometimes dimidiate, 

 striate, aperture oblong, star scarcely distinct. 



