A treatise on zoology . Fig. X. Eocystis longidactijlus. 1, portion of test much enlarged, showing variation in size, outline,and markings of plates, some of which have apparent pores at their edges; 2, upper part ofa specimen without test, showing portions of brachioles and impressions of kind permission of Dr. C. D. Walcott. thecal apertures, one side tending to be convex, the other of the two sides enclosed by a common frame of marginals. Platesof concave side tend to be fewer and more regular than those of convex,but never achieve bilateral symmetry as d
A treatise on zoology . Fig. X. Eocystis longidactijlus. 1, portion of test much enlarged, showing variation in size, outline,and markings of plates, some of which have apparent pores at their edges; 2, upper part ofa specimen without test, showing portions of brachioles and impressions of kind permission of Dr. C. D. Walcott. thecal apertures, one side tending to be convex, the other of the two sides enclosed by a common frame of marginals. Platesof concave side tend to be fewer and more regular than those of convex,but never achieve bilateral symmetry as do the latter. Tapering stem ofpolymeric columnals at one end of theca ; at the opposite end are theapertures, with function still uncertain. In some genera, spines (armsof most writers) are known, one at each upper angle of the theca. Orna-ment of granules, which on the theca tend to run in transverse, wavy,sub-parallel lines, simulating the scale-markings of some Crustacea. Nopores. J. Walther (1886) and Haeckel (1896)
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
