6S4 MESSES. E. HEEON-ALLEJv' AND A. EAELAND ON THE 



326. Spirillina lucida Sidebottom. 



Spirillina lucida Sidebottom, 1904, etc., KFD. 1908, p. 9, pi. ii. fig. 9. 

 „ Heron-Alleti & Earland, 1908, etc., SB. 1911, p. 327. 

 „ Heron-Allen & Earland, 1913, CI. p. 108, pi. ix. figs. 4, 5. 



1 Station. 



A single typical specimen. 



327. Spirillina ornata Sidebottom. (Pi. LI. figs. 24,- 25.) 



Spirillina ornata Sidebottom, 1904, etc., RFD. 1908, p. 9, pi. ii. figs. 7, 8. * 



1 Station. 



One typical specimen. It diffei's from Sidebottom's description only in the 

 texture, which is normally hyaline. The Deles specimens were '"' semi-opaque and of 

 a pale milky yellow colour " ; this would seem to point to the fact that Side- 

 bottom's specimens were dead shells, especially as the peripheral edge in the Kerimba 

 specimen is entire, whereas Sidebottom remarks that " the peripheral edge is 

 more or less sinuous unless this is due to a fracture." The markings, which in 

 the description of the Delos specimens are described as due to the shells being 

 " decorated with minute raised ridges except in the final convolutions," appear under 

 a high power to be due to the presence of paired foramina set in parallel rows across 

 the width of the tube. These pairs of foramina often coalesce into a slit-like 

 opening across the tube, and are possibly the "raised ridges" referred to by 

 Sidebottom. 



328. Spirillina insequalis Brady. 



Spirillina incequalis Brady, 1879, etc., ERG. 1879, p. 278, pi. viii. fig. 25. 

 Brady, 1884, FC. p. 631, pi. Ixxxv. figs. 8-11. 

 „ „ Egger, 1893, EG. p. 394, pi. xviii. figs. 40-42. 



Millett, 1898, etc., EM. 1903, p. 693. 



6 Stations. 



Excellent tj^pical specimens at many Stns., but the species is always rare. The best 

 individuals were at Stns. 5 and 11. 



329. Spirillina limbata Brady. 



Spirillina Umbata Brady, 1879, etc., RRC. 1879, p. 278, pi. viii. fig. 26. 

 Brady, 1884, EC. p. 632, pi. Ixxxv. figs. 18-21. 

 E-ger, 1893, EG. p. 395, pi. xviii. figs. 43, 41. 

 Elint, 1899, RFA. p. 326, pi. ixxi. fig. 5. 



5 Stations. 



Very sparingly distributed and always rare. The best specimens at Stn. 11, where 

 it attains a very large size. 



