This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...almost cylindrical zoarium, which has a length of nearly 50 millimeters and still is incomplete at the lower if not also at the upper end, where it has a diameter of only 8 millimeters. The zoarium is poriferous on tho outer side. Only the superstructure is presented to view, and of that only tho inner surface. This ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...almost cylindrical zoarium, which has a length of nearly 50 millimeters and still is incomplete at the lower if not also at the upper end, where it has a diameter of only 8 millimeters. The zoarium is poriferous on tho outer side. Only the superstructure is presented to view, and of that only tho inner surface. This shows a series of equal circular apertures, very regularly arranged in longitudinal rows, the branches and dissepiments (to adopt the terms used for analogous structures in the true zoarium) being exactly equal save only that the alternate branches are slightly larger, so that the apertures are more or less clearly grouped in double series. The longitudinal divisions, or branches, are of course continuous, and the transverse divisions, or dissepiments, are discontinuous. Seven apertures occur in 2 millimeters longitudinally. As already noted, no data relating to the inhabited portion of the zoarium can be given. If this specimen is at all normal it is clearly a new species, distinguished, if by nothing else, by its singular manner of growth. Corresponding structural differences, however, would doubtless be found in the complete specimen and indeed are already shown or suggested by the very regular arrangement of the openings in the superstructure and by their circular shape. Horizon and locality.--Boone limestone, in beds overlying the St. Joe limestone member, St. Joe, Ark. BB.ACHIOPODA. Lept-ena Analooa Phillips. A single fragmentary specimen represents this type, but its relationship is unmistakable. Horizon and locality.--Boone limestone, in beds overlying the St. Joe limestone member, St. Joe, Ark. Chonetes Ornatus var. Abkansanus n. var. Plate I, figures 4,4a. Shell very small, transverse, somewhat extended at the hinge line, rather inflat...
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