TRIBE I. ASTR^ACEA. 301 



15. FUNGIA DENTIGERA. (Leuckart.) 



F. eUiplica aut oblongo-ovata, supra convexa, subtus concava. Coral- 

 lum lamettis inaqualibus leviter jlexuosis, subtiliter serrulatis; denti- 

 bus tentaculatis grandibus et prominentibus : subtus radiatim echinu- 

 latum, papillis confertis exiguis, obtusis. 



Elliptical or oblong-ovate, convex above, concave below. Corallum 

 with the lamellae unequal, gently flexuous, very delicately serru- 

 late, tentacular tooth large and prominent: below radiately echinu- 

 late, with the teeth crowded, slender, and obtuse. 



Plate 18, fig. 4, a lamella with the tentacular teeth of other lamellae 

 projecting above it. 



Red Sea. Ruppett. Sandwich Islands. 



One of Riippell's specimens measured three and a half inches in 

 length, by two and two-thirds in breadth. The very finely serrulate, 

 flexuous lamellae, and the prominent tentacular tooth, to which the 

 name dentigera alludes, are the distinguishing characteristics. A spe- 

 cimen from the Sandwich Islands was five and a half inches long, 

 and three broad ; another seen by the author measured four inches, 

 by two and a half. The tentacular teeth in the Sandwich Island 

 specimen, were very stout, and two lines long. Below, the margin, 

 for a breadth of half an inch or more around, is sometimes in obso- 

 lescent folds half an inch or more in width. 



In other specimens, similar in the delicately minute serrulations of 

 the lamellae, and the character of the under surface, the tentacular 

 teeth are obsolete. Whether a distinct species or not, as is barely 

 possible, can be determined only from a study of the living zoophytes. 



Fungia dentigera, Leuckart, op. cit., p. 48, and tab. 3, fig. 1. 



16. FUNGIA SCUTARIA. (Lamarck.) 



F. oblong o-elliptica (?" : 4"), utrinque planiuscula. Corallum larnellis 

 subeequalibus, leviter undulatis, subintegris aut obsolete crenulatis, 

 oririma semilongitudine paulo minore, dentibus tentaculatis obsoktis: 

 subtus, confertim et csqualiter papillosum, papillis parvulis, rotundatis. 



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