Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume V (1877-1881)
Buel, Ira M.
The corals of Delafield, pp. 185-193 PDF (2.5 MB)
.T/e Corals of Delafeld. 191 present classed under the old genus because they have not been proved to belong to any other genus, i. e., their manner of growth has never been discovered. C atriltus, the first form noted under this designation, was first described in the Ohio reports. It is distinguished by the presence of small quadrangular, conical eminences, wLich are thickly scattered over the surface of the coral, especially at the flattened ends of the branches. The specimens from Ohio are described as cylindrical, frequently branching forms, from four to seven lines in diameter and eight to ten corallites in the space of one line. Ours are much smaller, from one and a half to three lines in diameter and flattened, with ten or twelve corallites in the space of a line. Clatdees Jamesi, described likewise in the Ohio re- ports, has its representative here also. The walls of the corallite cells in this form show the extraordinary thickness exhibited by the Ohio form, but also show a well marked groove upon their summit, a feature that is not noticed by Nicholsoa in his descrip- tions, nor shown in a type specimen which I have examined from that state. This feature has been before mentioned as a charac teristic of the Bryozoan genus Trematopora. C. fus~formis is a new species (see An. Rep't, '76, p. 70). This is a very minute form, less than an inch in length and an eighth of an inch in diameter. The cells are very minute, twelve to twenty in the space of a line. The cell walls are thick, sometimes with minute pores, sometimes with a well marked groove on their summits, and in other cases sharply ridged between the cells. The very close resemblance that exists between this form and Tirematopora annulife/a argues very strongly against their being placed in dif- ferent sub kingdoms. I have failed to find any characteristic in these two last species that should remove them from those of the genus Trematojorc. I desire also to call attention to some undescribed and perhaps previously unnoticed forms which I observed while classifying the collections of the state survey. The first is a thin expansion found encrusting a fragment of a Brachiopod shell. The cells in this form are rather larger than those of a -y of the other species here noted, and seemed to be
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