FORAMINIFERA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 169 



NORMAN, H. N., Report Brit. Assoc. Swansea Meetimj, p. 335. 



PAKKER, W. K., and T. RUPERT JONES, "On sonu-. Foraiuinifera from the North Atlantic and Arctic Oceans, 



including Davis Straits and Builin liny," Phil. Trans., vol. civ. pp. 325-442, 1865. 

 PEARCEY, F. G., "Foraiuinifera of the Faroe Channel and AVyville Thomson Ridge," Soc, Nat. Hixf. Trans. 



Glasgow (New Series), vol. ii. pp. 163-179, pi. i., 1890. 

 REUSS, A. E., "Die Foraminiferen-Familie der Lagenideen," Monoyraphisch daryestellt, 36 pp., 7 pi., 8vo, 



WiL-n, 1863. 



SAES, G. O., Vidensk-Selsk. ForhamU., 1871, p. 251. 

 WILLIAMSON, W. C., "Recent Foraminifera," Ray Soc. Publication, 1858. 



EXPLANATION OF PLATES. 



PLATE I. 

 Figs. 1-3, Pelosina arborescens, n. sp. 



Fi<*. 1. General aspect of the test of a living specimen, showing the oral apertures of seven of the 

 arborescent tubes surrounded by sarcode and expanded pseudopodia. From Loch Fyne, west coast of 

 Scotland, 107 fathoms. x 2. 



Fig. 2. Portion of test from near the base of the arborescent tubes, laid open to show the thickness of 

 the walls. x 8. 



Fig. 3. Transverse section across the tubular neck of test, filled with granulated sarcode, viewed by 

 transmitted light. x 15. 



Figs. 4-5, Pelosina arborescens, n. sp. 



Fig. 4. A broken specimen with fragments in position ; the spaces between indicate where fracture 

 took place. From Station 420, Weddell Sea, 2620 fathoms. x 5. 



Fig. 5. A portion of the test from near the base of the branching tubes, open transversely, showing the 

 thickness and character of the wall. x 6. 



Figs. 6-10, Reoplta.c robustus, sp. nov. 



Figs. 6, 7, 8 represent three stages of development, and show the robust external character of test, and 

 selective power shown by the organism of the building material. x 25. 



Fig. 9. Younger specimen with test laid open longitudinally to show interior and comparative smooth- 

 ness of the chambers. x 25. 



Fig. 10. End view of last chamber to show aperture. x 25. 



Figs. 11-12, Thwammina favosa, var. reticulata, var. nov. 



Fig. 11. Showing general aspect of test. x 25. 



Fig. 12. A specimen laid open to show thickness of wall and the smooth interior. x 25. 



Figs. 13-15, Hormosina irregularis, n. sp. 



Fig. 1 3. Specimen showing the lateral aspect of test and the irregularity in forming the chambers, x 25. 

 Fig. 14. Younger specimen composed of two chambers only. x 25. 



Fig. 15. Specimen with one chamber laid open to show the thickness of wall, and aperture from the 

 interior side. x 25. 



PLATE II. 

 Figs. 1-2, Syringammina minuta, sp. nov. 



Fig. 1. Specimen showing general aspect, attached to a crystal of quartz (sercone), with tubular offshoots, 

 adding to the rigidity of the test. x 30. 



Fig. 2. Portion of a radial section, showing at a a the concentric reticulated portions. x 50. 



(ROT. soc. EDIN. TRANS., VOL. XLIX., 1043.) 



