PLATE XI 



Fig. 4-2. Phortirium pijlonium (Hck.?) Cl., «7,. The Tys FiorcL "Vs 1S99, 0—700 m. 



e. The same specimen as fig. 42 a— d (pl. X); lateral view. 



f. Same specimen, same view, optical section (.= sagittal one). The outer sagittal giitlle is seen from the side, and two 

 similar inner ones. 



„ 43. Ph. pylonium (Hck.?) Cl., forma (?) ; *=°/,. From the same locality. In a certain position of the shell, this spiral is seen. 

 „ 44. Ph. iiyhnium (Hck.?) Ciu, funna CO: '^^"/i. Odupyle octosfi/lc f minor J ørg. Sea off Røst, ='-A 1899, 0—900 m. Apical view. 

 „ 45. Ph. pylonium (Hcic?) Cl., forma (?): ■'^"/i. Octopyk. octostyle f. minor Jørg. From the same locality. 



a. Dorsal view. 



b. d. The same specimen; lateral view. The right and left sides correspond to the lower and upper ends of fig. a. 



c. Same specimen; apical view. 



„ 46. StreUacantha circunitexta (Jørg.). ■'""/i- The Tys Fiord, -*/.i 1899, 0— "()(» m. 



a. There are more byspines than illustrated in the figure. Most of them are only seen with difficulty, except near the outlines. 



b. Same specimen, same view, optical section. 



c. Young specimen with 9 main spines. 



d. The same in optical section. 



f. The pores on a portion of the outer shell, of an oldei' specimen. 



e. Same specimen, showing a piercing main spine with tiie fine comiecting beams between the byspines. Side view. 



