382 
THE VOYAGE OF H.M.S. CHALLENGER. 
Gaudryina siphonella, Reuss (PI. XLVI. figs. 17-19). 
Gaudrtjina siphonella, Reuss, 1851, Zeitscfir. d. deutscfi. geol. Gesell., vol. iii. p. 78, pi. v. 
figs. 40-42. 
Textilaria reussi, Speyer, 1864, Die Tertiar-Fauna von Sollingen, p. 83 {fide Reuss). 
Gaudryina siphonella, Reuss, 1870, Sitzungsb. d. k. Ak. Wiss. Wien, vol. lxii. p. 463, No. 1, — 
Scfilicfit, 1870, Foram. Pietzpulil, pi. xxiv. figs. 26-29. 
w „ Hantken, 1875, Mittfieil. Jafirb. d. k. ung. geol. Anstalt., vol. iv. p. 14, pi. i. 
fig. 3. 
Pledina dava, Marsson, 1878, Mittfieil. naturw. Vereine v. Neu-Vorpom. u. Riigen, Jafirg. x., 
p. 160, pi. iii. fig. 29 a.-d. 
The original figures of Gaudryina siphonella (loc. cit.) are probably somewhat idealised, 
as they represent a test constructed with a diagrammatic regularity seldom encountered 
amongst dimorphous Foraminifera ; von Schlicht’s drawings, allotted by Reuss to the 
same species, suggest, on the other hand, extreme irregularity of contour. Something 
between the two is the more common condition ; and the elongate, subcylindrical, 
somewhat tapering tests, with inflated segments, and projecting terminal apertures, well 
portrayed in PL XLVI. figs. 17-19, sufficiently illustrate the typical features of the species. 
Recent specimens are generally minute and inconspicuous, but they vary a good deal as to 
size, and may be found from -g^th to ^g-th 'inch (0‘3 to 0’9 mm.) in length. 
Though comparatively rare in the living condition, Gaudryina siphonella is very widely 
distributed. It has been observed at three points in the North Atlantic, at two in the 
South Atlantic, at three in the North Pacific, and at five in the South Pacific. It 
appears to prefer deep water, for of the thirteen Stations above enumerated, six have a 
depth of more than 2000 fathoms, one being in the deepest part of the North Pacific, 
3950 fathoms; whilst four are between 1000 and 2000 fathoms; and only three at less 
than 1000 fathoms. 
As a fossil it has been collected by Reuss and Schlicht in the Septaria-clays of North 
Germany, and by Hantken in the Lower Clavulina-szab6i beds of Hungary. The 
somewhat obscure fossils figured by Marsson (loc. cit.) from the Cretaceous formation of the 
Island of Riigen appear to be nothing more than irregular specimens of the same species. 
Verneuilina, d’Orbigny. 
Texhdaria, pars, Munster [1838], Reuss, Bailey, Parker and Jones, Fischer. 
Verneuilina, d’Orbigny [1840], Reuss, Costa, Karrer, Parker and Jones, Brady, M. Sal's, Terquem, 
Robertson, Wintfier, Wrigfit, Marsson, Bertfielin, &c. 
Bidimina, pars, Reuss [1846], Altfi, Egger, Williamson, Parfitt. 
Polymorphina, Scfiultze [1854]. 
Rhynchospira, Hantken [1875], 
Reussia, Scfiwager [1877]. 
The genus Verneuilina was devised by d’Orbigny for the regular triserial Textularin a, 
typified by the Cretaceous Verneuilina tricarinata ; and with some limitation as 
