PLATE XXVI. 



PELOSINA. — Hli'POCREPlNA. — Bathysiphon. 



Diam. Page 



Figures 1-6. — Pelosina cylindrica, n. sp. s . . . x 9 236 



Figs. 1-3. Lateral aspect; tig. 4, oral end; tig. 5, 



aboial end. 

 Fig. 6. .Specimen laid open to show the thickness of 



the walls and the smooth interior. 



„ 7-9.- — Pelosina variabilis, Brady, . . . . x 9 235 



Figs. 7, 8. General aspect of the test. 

 Fig. 9. Portion of a test laid open to show the thick- 

 ness of the walls. 



„ 10-14. — Hippocrepina indivisa, Parker, . . . x 45 325 



Figs. 10, 11. Lateral aspect; tigs. 12, 13, oral end. 

 Fig. 14. Test laid open longitudinally, showing the 

 undivided cavity. 



„ 15-20. — Baihy siphon fliformis, M. Sars, .... 248 



Figs. 15, 16. General aspect of the test, . x 3 



Fig. 17. Portion of a specimen laid open longitudinally, 



to show the structure of the walls and the 



nature of the internal cavity, 

 Fig. 18. Transverse section of the test, viewed by 



transmitted light, 

 Fig. 19. Longitudinal section of the wall, with a mass 



of adherent dark-coloured sarcode, 

 Fig. 20. Longitudinal section, more highly magnified, . 



