462 ZOOPHYTES. 



Feejee Islands. Exp. Exp. 



The specimen in the collections is a small clump, four inches in 

 diameter, consisting of short digitiform branchlets, covered unevenly 

 with very large and stout appressed-tubiform calicles, having a smooth 

 exterior. The under surface of the outer branchlets is much flattened 

 and nearly naked. 



p. digitata of Gualtieri. Under this name a fragment is alluded to 

 belonging to the Boston Natural History Society, presenting many of 

 the above-mentioned characters. It is branched, but whether cespi- 

 tose or fruticose is not deter minable from the specimen. The branches 

 are from one-half to three-quarters of an inch thick, and are unevenly 

 covered with very stout calicles one and a half to three lines long, 

 appearing smooth and not at all striate, having a thick lip and a small 

 circular aperture very neatly stellate. The summits of some of the 

 branchlets are acervately proliferous, like the acervata, and terminate 

 in two or more large and stout scarcely exsert calicles ; but the lateral 

 calicles are larger, and have not the exterior striate. (Madrepora albida 

 digitata of Gualtieri, figured in his index, on back of title page to part 

 third.) 



30. MADREPORA. RETUSA. (Dana.) 



M. cespitosa, pumila, convexa, ramulis digitiformibus, \" crassis, < 2\" 

 longis, non teretibus, apice truncatis. Corattum caliculis lateralibus 

 confertis, apiceque ramulorum acervatis, valde inczqualibus, aliis 3'" 

 longis, aliis sparsis obsoletis, appresso-tubiformibus et tenuibus, labio 

 elongatis, extus kvibus ; apertura scepe oblongd, stelld vix conspicua. 



Cespitose, small, convex, branchlets digitiform, an inch thick, 

 24 inches long, not terete, truncate at summit. Corallum having 

 the lateral calicles crowded and acervate at the summit of the 

 branchlets, very unequal, some 3 lines long and others obsolete 

 interspersed, appressed-tubiform and slender, lip elongate, exterior 

 smooth ; aperture often oblong, star scarcely distinct. 



Feejee Islands. Exp. Exp. 



The specimen in the collections is a small clump about four inches 

 high and as many broad, consisting of a few irregular digitiform 

 branches rising from a common base. The species is remarkable for 



