PLATE XV. 



Fig-. 69. Protoscenium simplex (Cl.) Jørg., '•''•°i\. fSea north of Shetland 63" 36' n.. O" 32' e., "A 1903, o m. (S/S Micliael Sårs). 



Somewhat oblique, apical view. Diameter of the network 68 |i. 

 „ 70. Euscenkim corynephorum Jøkg., ^'"^/i. Raftsund. 'V2 1899, 0—260 m. Oblique antapieal view. Diameter of the network 



about 100 [).; longest spines 120 ii. 

 „ 71. Cladoscenium Jricolpium (Hck.) Jørg., ■''"/i. A well developed specimen from the By Fiord (near Bergen), -V2 1899, — 50 m. 



Ventral-lateral view; the spine Lj in front. Network 58 |j. high, 75 \>. broad. Tophorn protruding 94 \>.. 



b. The same as a. optical section, showing the most important spines and arches. 

 „ 72. C', tricolpium (Hck.) Jørg., very young specimen; ■"*7i. Helligvær, '-/i 1899, 0—250 m. 



a. Oblique, apical view. 



b. I;atei-al view; the spine Lj in front. 



„ 73. C. tricolpium (Hck.) Jørg., young specimen; '"*'7i. Fom the same locality. Apical view. 



„ 74. C. limhiihim Jørg. n. sp., ''°7i- Sea 40 miles N\V of Gaukværø, ^7i 1899, — 7<>0 m. Lateral view. In the upper part, 

 tile outer netwoi'k is removed. 



„ 75. Peridinm longispinum Jørg. Sea off Aalesund. 61° 56' n.. 2° 40' e.. '"/j 1903, <) m. (S/S Mieliael Sars). A well devel- 

 oped specimen. 



a. Ventral view; the „tophom" downwards; ''"7i- 



b. The same, lateral-venti'al view; the spine L in front; ■''"'/i. Diameter of the network 32 11-. 



,, 76. P. longispinum Jørg., *=7i. The Vest Fiord II, "/'i 1899, 0— 20(i m. The typical form. Cephalis 42 ]). high. 



a. Lateral-ventral view. 



b. Lateral view; the spine L in front. 



e. Apical view; the very long ventral sagittal spine is seen. 



(1. The same, lower optical section, showing the meshes about the spines D and V. 



,. 77. /'. loiuiispiiium JoRG., ''571. Øxsund, 'Vs 1899, 600 m. Not fully developed specimen; dorsal view. Diameter of the net- 

 work 34 [i. 



„ 78. I', hnuiispinum JøR{^., "'*7i- Helligvær, '7i 1899, — 250 m. Ventral view. 



„ 79. P. lungi)<pinum Jøkg., "'*7i. From the same locality. Lateral view. Ceplialis 50 |i. long. 42 ;). broad. 



