REPOET ON THE FORAMINIFERA. 
407 
common as the latter species in the North Atlantic, having been noticed at only eight 
Stations ; but it is even more generally diffused in the South Pacific. It has been found 
at Station 122 in the South Atlantic, and at Station 209 in the North Pacific. 
The bathymetrical range has a somewhat deeper average than that of Bulimina 
buchiana, the extremes being 95 fathoms and 2435 fathoms ; but out of twenty-one 
localities, only two have a depth of less than 340 fathoms, whilst eight are above 1000 
fathoms. 
In the fossil condition it occurs in the Septaria-clays of North Germany (Reuss, 
Schlicht), and in the later Tertiaries of Southern Italy (Seguenza), and of the Nicobar 
Islands (Sch wager). 
Bulimina buchiana, d’Orbigny (PI. LI. figs. 18, 19). 
Bulimina buchiana, d’Orbigny, 1846, For. Foss. Vien., p. 186, pi xi. figs. 15-18. 
„ presli, var. buchiana, Parker and Jones, 1865, Phil. Trans., vol. civ. p. 374, pi. xvii. 
fig. 71. 
,, truncana, Giimbel, 1868, Abh. d. k. bayer. Akad. Wiss., II. Cl., vol. x. p. 644, 
pi. ii. fig. 77, a.b. 
„ buchiana, Terrigi, 1880, Atti dell’ Accad. Pont., ann. xxxiii. p. 195, pi. ii. fig. 37. 
D’Orbigny’s figures of Bulimina buchiana represent a regularly triserial, tapering 
shell, with distinct and somewhat inflated segments, and a surface-ornament of continuous 
longitudinal costae which extend from the pointed extremity to near the middle of the 
final whorl of segments. The drawings (PI. LI. figs. 18, 19) are from specimens a little 
stouter than d’Orbigny ’s, but otherwise typical examples of the species. 
Bulimina buchiana is intimately connected with Bulimina injlata on the one hand, and 
Bulimina rostrata on the other ; and though it might be impossible to separate the three 
forms by any invariable characters, they are sufficiently distinct under ordinary circum- 
stances to admit of easy identification. The test of Bulimina injlata is of similar size to 
that of the present species, and exhibits the same general structure ; but the costse are 
short, and are continued beyond the margin of the chambers in the form of stout spines. 
The test of Bulimina rostrata is usually of much smaller dimensions, the costse are con- 
tinuous and cover the whole test except a little patch at the distal end, and the segmen- 
tation is indistinct or entirely concealed. 
Bulimina buchiana affects tolerably deep water. It is abundant in the North 
Atlantic, from about lat. 60° N. to the equator, at depths of 150 to 1675 fathoms, and 
has been found in one locality at 90 fathoms. It is scarce in the South Atlantic, having 
only been noticed at two Stations near Pernambuco, depth 350 fathoms and 675 fathoms 
respectively; it is moderately common in the South Pacific, 129 fathoms to 2375 ; and 
has been obtained off the Cape of Good Hope, 150 fathoms. The species has not been 
observed in any part of the North Pacific. 
