Transactions of the Connecticut Academy of Arts and Sciences . ^ be wanting, or evenreplaced by a slightly sunken area or fosse, surrounded by a raisedborder, as in 0. rohusta Pourt. and some of the other species. 174 A. E. Verrlll— Comparisons of Coral Faunae. On the smaller branches and branchlets the swollen bases of thecorallites gradually deci-ease in size, till they may disappear. Insuch cases the distal corallites are cylindrical, somewhat prominent,and they stand at a rather wide angle to the branch, even to nearthe tips. But quite often the bases are distinctly swollen nearly tothe ti
Transactions of the Connecticut Academy of Arts and Sciences . ^ be wanting, or evenreplaced by a slightly sunken area or fosse, surrounded by a raisedborder, as in 0. rohusta Pourt. and some of the other species. 174 A. E. Verrlll— Comparisons of Coral Faunae. On the smaller branches and branchlets the swollen bases of thecorallites gradually deci-ease in size, till they may disappear. Insuch cases the distal corallites are cylindrical, somewhat prominent,and they stand at a rather wide angle to the branch, even to nearthe tips. But quite often the bases are distinctly swollen nearly tothe tips of the branches. The costal striae are often well developed, about 24 in number,radiating on the sides, but often curving at the sutural lines, whenthe latter are distinct between the bases of the corallites. On thelarger branches and trunk the costal strife and sutural grooves areoften entirely lacking and the whole surface appears Figure 11.—Oeulina varicosa Les. Part of a branch with the polyps expanded;much enlarged. From a drawing by A. H. Verrill. The septa are mostly 24 to 36, varying in width and thicknessaccording to the cycles. The 12 larger ones are usually distinctlythicker and wider than the others, subentire, and only a little exsert,broadly rounded at summit, thick at the walls. The pali are generally 10 or 12, rather small and thin, and notvery prominent. The columella is of modei-ate size and papillose. On our largest specimen there are several scattered, abnormall}large corallites, having 40 to 56 or more septa. These are exsertand have large and deep calicles with narrow septa. Their caliclesare 5 to T™ in diameter. The ordinary calicles are mostly about 21b to 3-50 in diameter,rarely 4°°, but on the thicker branches and trunk their diameter isoften only 2™™, being smallest in those corallites that have veryswollen bases ; these large bases are often 10 to 13^™ in diameterand 6 to 8
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectscience, bookyear1866
