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Jørgensen 1905

Plate 16

Fig. 80. Peridium longispinum JØRG., 450/1. Senjen, 21/1 1899, 0-130 m. Fully developed specimen. Lateral view; the left lateral arch (Br), with two byspines in front.

Fig. 81. Lithomelissa setosa JØRG., 450/1. Hennigsvær, 17/1 1899, 0-180 m. Young specimen. Dorsal view; the spine A in front, somewhat to the left (directed downwards).

Fig. 82. Lithomelissa setosa JØRG., 450/1. Apical view.

Fig. 83. Lithomelissa setosa JØRG., 450/1. The Herlø Fiord (near Bergen), 24/5 1899. Almost fully developed specimen; lateral view.

Fig. 84. Lithomelissa laticeps JØRG., n. sp., 450/1. Sea off Røst, 22/3 1899, 0-900 m.
a. Lateral view.
b. The same, optical section, showing the main spines.

Fig. 85. Lithomelissa hystrix JØRG., 450/1. Skroven, 1/2 1899, 0-300 m. 50 µ high and broad. Thorax 36 µ high; cephalis 14 µ high, 25 µ broad. Most of the spines broken off.

Fig. 86. Helotholus histricosa JØRG. n. sp., 450/1. Øxsund, 17/2 1899, 0-300 m.
a. Inside the shell the long axial divided spine is seen.
b. Antapical view of the cephalis and the upper part of the thorax (neck stricture). 4 spines are seen.

Fig. 87. Helotholus histricosa JØRG., 380/1. From the same locality. Young specimen.
b. Portion of a broken shell, showing the protruding ventral, sagittal spine.

Fig. 88. Helotholus histricosa JØRG., 450/1. Ofoten II, 7/2 1899, 0-100 m. Apical view. Diameter of the thorax 94 µ, of the cephalis 27 µ. Pores very uneven, from 5 to 20 µ.

Fig. 89. Dictyophimus histricosus JØRG. n. sp., 450/1. Sea off Røst, 22/3 1899, 0-900 m. Shell 68 µ high, 85 broad; cephalis 22 µ high, 34 broad. Pores uneven, from 9 µ to very small, not considerably smaller in the cephalis.
b. The same; optical section, showing 4 main spines. The three swellings, mentioned under Lithomelissa setosa (above p. 127) and other species, are distinctly seen.

Fig. 90. Litharachnium tentorium HCK. Sea north of Shetland, 63° 36' n., 0°32' e., 11/2 1903 (S/S Michael Sars).
a. The entire shell of a fully developed specimen, 200/1.
b. Upper (conical) part of the shell, 450/1.
c-e. Pores and parts of the network, 660/1; c from below the broken part of the shell, e the largest pores of the cone, above the beginning intermediate ribs, d farther down on the cone, where intermediate ribs appear.

Fig. 91. Litharachnium tentorium HCK., 450/1. Skroven, 4/4 1899, 0-150 m. Young specimen.
a. Lateral view.
b. Apical view. The 3 primary meshes in the neck stricture are seen.
c. A portion of the network near the margin below.