S3 DISCOVERY REPORTS 



Small specimens are usually oval in contour, owing to the change in shape when the 

 tube assumes the planospiral condition. After the first planospiral convolution, it 

 rapidly assumes a more circular contour. 



Specimens taken direct from spirit, stained and mounted in balsam show that the 

 protoplasmic body is voluminous, almost filling the tube from end to end. The proto- 

 plasm is finely granular and filled with food bodies, including Diatoms and spicules. 



Gordiospira fragilis was observed at six stations in South Georgia, and is frequent at 

 Sts. 45, 149, MS 68, at all of which a series in all stages was obtained. In depth its 

 range extends between 26 and 270 m. 



Family ASTRORHIZIDAE 

 Sub-family ASTRORHIZINAE 

 Genus Astrorhiza, Sandahl, 1857 



34. Astrorhiza limicola, Sandahl (Plate I, fig. 32). 



Astrorhiza limicola, Sandahl, 1857, Ofvers. K. Vet. Ak. Fork., xiv, p. 299, pi. iii, figs. 5, 6. 

 Astrorhiza limicola, Brady, 1884, FC, p. 231, pi. xix, figs. 1-4. 



Three stations: 27, 144; WS 33. 



The rarity of this species in what might have been regarded as favourable surroundings 

 is rather surprising. A single specimen only was found at each station, and every example 

 is small compared with the individuals dredged off our own coasts. The specimen from 

 WS 33 is noteworthy as incorporating many long sponge spicules in its material. These 

 spicules project irregularly, and their presence is probably quite fortuitous, though they 

 may serve as supports in the ooze. I do not recall having previously seen spicules so 

 used in this genus. 



35. Astrorhiza crassatina, Brady. 



Astrorhiza crassatina, Brady, 1879, etc., RFC, 1881, p. 47; 1884, FC, p. 233, pi. xx, figs. 1-9. 

 Astrorhiza crassatina. Goes, 1894, ASF, p. 13, pi. ii, figs. 11-15. 

 Astrorhiza crassatina, Flint, 1899, RFA, p. 265, pi. ii. 



One station: 45. 



A single recognizable fragment. 



36. Astrorhiza triangularis, sp.n. (Plate I, figs. 8, 9). 



Two stations: 144, 148. 



Test triangular, compressed and cushion-shaped, consisting of a thin shell of sand 

 grains of varying sizes firmly cemented together and enclosing the single chamber, 

 which occupies the whole interior of the test. An aperture at each corner, flush or 

 provided with a short external tube. Surface rough, owing to the projecting sand grains. 

 Average length of side, excluding oral tubes, about 1-3 mm. Tube up to 0-3 mm. in 

 length. 



