410 MR. F. CHAPMAN ON THE 
recognized specimens of Bolivina. The best specimens in the 
Funafuti dredgings come from Funamanu, 150 fathoms, and 
from Tutanga at 200 fathoms. For other occurrences, see 
Table, p. 398. 
CRISTELLARIA MIRABILIS, sp. nov. (Pl. 36. fig. 15.) 
Test complanate, subovate; broad at the distal end, narrowing 
towards the aboral end, which carries an alate margin. The 
commencement of the shell has two or three small imperfect and 
crescentic costule on the lateral surface. Sutural lines faintly 
marked, oblique and recurved towards the oral margin of the 
shell. Length 7 mm.; approximate breadth 5°5 mm. 
Off Tutanga, 200 fathoms; very rare. 
GLOBIGERINA SUBCRETACEA, sp. nov. (Pl. 36. figs. 16 a, 6.) 
Globigerina cretacea?, Brady (non d’Orbigny), 1884, Rep. Chall. vol. ix. 
p. 596, pl. Ixxxii. fig. 10. 
The above recent species has hitherto been referred to the 
Cretaceous type of G. cretacea. There is, however, no reason for 
retaining that name for the recent specimens, for they differ 
essentially from the typical Chalk Globsgerine. The recent 
specimens have a thick structured shell-wall: the chambered 
whorls of the test are few, and the spire is depressed or even 
excavate. 
Brady remarks*, concerning these recent forms:—“TI have never 
met with recent specimens, either amongst surface-organisms, or 
in bottom-ooze. which presented exactly the same characters as 
the typical Cretaceous variety; though shells similar in general 
conformation, and more nearly related to Globigerina cretacea 
than to any other recognized modification of the genus, are not 
uncommon in certain localities.” 
This species, in common with others of the same genus, 
increases in frequency in the deeper dredgings taken round 
Funafuti. 
SPIRILLINA DECORATA, Brady, var. UNILATERA, nov. (PI. 36. 
figs. 17 a, 6.) 
Test with one face having the whorls rounded and the surface 
smooth, or with traces of linear markings across the tube; the 
other face resembling that of the type form S. decorata, Brady yf. 
Diameter of test -25 mm. 
* Rep. Chall. 1884, vol. ix. p. 597. 
+ Ibid. p. 633, pl. Ixxxy. figs, 22-25, 
