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Class, FLEXIBLE CORALLINES. 
Aquatic, tubed, simple or branched, flexible, rooted, substance corneous, sur¬ 
mounted with carnose tentacula that supply the structure with food. 
Genus, EUDENDRIUM. Ehrenberg. 
Erect, rooted by creeping fibres, much and irregularly branched, polypes from 
the apices, non-retractile, roundish, the body encircled with a zone of 15 tentacula, 
the mouth central. 
No. 284. E. rcimosum. Ellis. Slender, pinnately branched, single tube, 
branches ringed at their origins. 
On fike hedges, very abundant, 5 to 8 inches high, of a dull horn color; dense clusters of this Coialline 
attached to twigs are thrown on the beach at Jersey City. 
Genus, TUB ULARIA. L. 
Root a creeping fibre, unbranched, polypes at the extremities of the tube, non- 
retractile, furnished with two rows of smooth filiform tentacula, one row around the 
middle of the head, and one row around the mouth. 
No. 265. T. in divisa. Lin. sys. Tubes clustered, smooth throughout. 
Summer and autumn, on stakes and shells, below low water mark, thrown on shore at Jersey City, Red 
Hook, Staten Island, and other parts of the Bay. 
No. 286. T. larynx . Ellis. Clustered filiform, ringed at distant and regular 
intervals. 
Summer, on floating wood near the surface, at Rabineau’s bath, Floating Chapel, East River, and on 
fike-hedges, near Ellis’ Island. 
Genus, HALCEIBM. Oken. 
Stem of aggregated capillary tubes, much branched, branches alternate, spread 
at wide angles, cells tubular, jointed at the base, alternate from opposite sides, ova¬ 
rian vesicles irregular, scattered, polypes scarcely retractile within the cells. 
No. 267. H. halecinum. Johnston. Vesicles oval or oblong, the aperture 
shortly tubulous, subterminal. 
On shells and stones in deep water, thrown on shore at Staten Island, Jersey City, and other places in 
the harbor. I found it pendulous on stones at low water mark at Castle Garden; all the specimens that I 
found have the appearance of having laid in the mud a long time. 
No. 268. H. muricatum. Vesicles ovate, echinated. 
Autumn, in deep water, on the fike-hedges, on oysters at Robbin’s Reef, Kavon Point, & c . It is the 
Laomedea muricata of Lamouroux. 
This Coralline is very variable in habit; some varieties I found on oysters in the East River, has all the 
characteristics of H. Beanii of Johnston ; but I shall include all such varieties under H. muricatum. 
Genus, SERTULAllIA. L. 
Variously branched, the branches single tubed, denticulated or serrated with the 
