Echinoderms of Connecticut (1912) Echinoderms of Connecticut . echinodermsofcon00coew Year: 1912 132 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. the body are closely crowded calcareous deposits of characteristic form (Fig. 23). They greatly increase the firmness of the integument. Some of these deposits are quite symmetrical, while others are very irregular. The most typical shape is that of a table in form of a parallelogram, perforated by four oval holes, and surmounted by a spire consisting of two rods with a few sharp points at the apex (Fig. 23). Others are rectangular, with six hole
Echinoderms of Connecticut (1912) Echinoderms of Connecticut . echinodermsofcon00coew Year: 1912 132 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. the body are closely crowded calcareous deposits of characteristic form (Fig. 23). They greatly increase the firmness of the integument. Some of these deposits are quite symmetrical, while others are very irregular. The most typical shape is that of a table in form of a parallelogram, perforated by four oval holes, and surmounted by a spire consisting of two rods with a few sharp points at the apex (Fig. 23). Others are rectangular, with six holes, and a small spire. Still others have eight, ten, or occasionally more holes. Some are considerably elongated, and, when unusually slender, have one or two small holes in each extremity. The vast majority have graceful, curved or wavy outlines, and are remarkably symmetrical. At the posterior end of the body the tables become densely packed together, and are of much larger size than those found elsewhere. Near the cloaca the spire of the tables becomes much reduced, the deposits assuming the form of large perforated plates. The cloacal opening is supported by a ring of crowded cal- careous plates of large size, but quite irregular in shape (Fig. 24). In the pedicels the calcareous deposits are slender tables, and near the extremity are reduced to supporting rods with perforated ends. The tip of each pedicel has a terminal perforated plate (Fig. 24). FIG. 24. Cucumaria pulchorrima. Outlines of calcareous plates. A, from cloaca; B, terminal disks of pedicels. (X 150.) In the tentacles there are a few small plates of very irregular outline, with an occasional one of much larger size.
Size: 2389px × 837px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
