324 DISCOVERY REPORTS 



figured by Sidebottom (1904, etc. RFD, 1908, p. 7, pi. ii, fig. 2) as Spirillina vivipara 

 var., or to Williamson's figure of Spirillina tnargoritifera. Careful examination of 

 specimens in balsam under high powers failed, however, to give any evidence of per- 

 forations, and their pale amber colour in that medium seems conclusive evidence of the 

 porcellanous nature of the shell. 



50. Cornuspira foliacea (Philippi). 



Orbis foliaceus, Philippi, 1844, EMS, p. 147, pi. xxiv, fig. 25 (error for 26). 

 SpiriUina foliacea, Williamson, 1858, RFGB, p. 91, pi. vii, figs. 199-201. 

 Cornuspira foliacea, Brady, 1884, FC, p. 199, pi. xi, figs. 5-9. 



One station: WS 531. 



A single broken specimen, only, represents this very widely spread species in our 



material. 



Genus Opthalmidium, Zwingli and Kiibler, 1870 



51. Opthalmidium inconstans, Brady. 



Hauerina inconstans, Brady, 1879, RRC, p. 268. 



Opthalmidium inconstans, Brady, 1884, FC, p. 189, pi. xii, figs. 5, 7, 8. 



Opthalmidium inconstans, Flint, 1899, RFA, p. 302, pi. xlvii, fig. 3. 



Two stations : WS 93, 245. 



Single small individuals at each station. The occurrence of only single specimens of 



this widely distributed species is noteworthy. 



Family ASTRORHIZIDAE 



Sub-family ASTRORHIZINAE 



Genus Iridia, Heron- Allen and Earland, 1914 



52. Iridia diaphana, Heron- Allen and Earland, 



/nJ?fld'«a^//a«a, Heron-Allen and Earland, i9i4,etc.,FKA, i9i4,p. 37i,pl.xxxvi, I9i5,p. 607. 



Iridia diaphana, Heron-Allen and Earland, 1916, FSC, p. 37. 



Iridia diaphana, Heron-Allen and Earland, 1930, FPD, p. 65, pi. iii, figs. 32, 33. 



One station: WS 246. 



Only a single specimen, attached to a Polyzoan fragment, which can be identified with 



practical certainty. 



Genus Storthosphaera, F. E. Schulze, 1875 



53. Storthosphaera depressa, Pearcey. 



Storthosphaera depressa, Pearcey, 1900, RCA, p. 37, pi. i, fig. i. 

 Storthosphaera depressa, Heron-Allen and Earland, 1922, TN, p. 231. 



One station: WS 217. 



Two specimens utilizing spicules more largely in their construction than is usual in 

 British specimens. Like Dendrophrya erecta {post no. 58), it is probably widely 

 distributed, but has only been recorded from Britain up to the present. 



