REPORT OH THE FORAMINIFERA. 
173 
under notice, sufficiently distinct in general contour to rank as local varieties, and as such 
they have been treated separately. 
The distribution of Miliolina bicorfiis is exceedingly wide, but confined to the temperate 
and tropical zones; and no more characteristic specimens are to be found than those from 
our own coast. Like most of its congeners it affects shallow water — from shore-pools to 
a depth of 40 or 50 fathoms ; in rare cases as low as 120 fathoms. 
In the fossil condition good representatives of the species are recorded, under one 
name or other, in marine deposits of almost every age, from the Miocene epoch to the 
present time. 
Miliolina boueana, d’Orbigny, sp. (PI. VII. fig. 13, a.b.c.). 
Triloculina brongniartiana ('?), d’Orbigny, 1839, Foram. Cuba, p. 156, pi. x. figs. 6-8. 
Quinquelocalina boueana, Id. 1846, For. Foss. Vien., p. 293, pi. xix. figs. 7-9. 
„ nussdorfensis, Id. Ibid. p. 295. pi. xix. figs. 13-15. 
Triloculina striatella, Karrer, 1868, Sitzungsb. d. k. Ak. Wiss. Wien., vol. Ivii. p. 140, pi. ii. fig. 2. 
Quinqiieloculiua costata, Terquem, 1878, Mem. Soc. geol. Fr., ser. 3, vol. iif p. 63, pi. vi. figs. 3, 5. 
Miliolina boueana is nothing more than a compact and regular variety of Miliolina 
bicornis, with distinct and neatly rounded segments. Quinqueloculina nussdorfensis of 
the “ Vienna Basin ” memoir is the same, with characters a little nearer Miliolina bicornis 
itself; indeed the figures of the species given by Costa (Atti dell’ Accad. Pont. vol. vi'i., 
pi. xxv. fig. 11) are distinctly referable to the typical form. Triloculina brongniartiana, 
d’Orbigny, and Triloculina striatella, Karrer, appear to me to be only young examples, in 
a Triloculine condition, of the species under notice. 
The distribution of Miliolina boueana is probably coextensive with that of Miliolina 
bicornis. 
Miliolina scrobiculata, n. sp. (PI. CXIII. fig. 15, a.b.c.). 
Test usually Triloculine ; elliptical, compressed, margin rounded. Segments neatly 
and evenly fitted so that the end view is of long oval contour. Mouth a long, narrow, 
oval fissure, occupying almost the entire width of the final segment, surrounded by a 
thickened lip. Surface longitudinally striate. Length, ^tli inch (0'63 mm.). 
Though Miliolina scrobiculata is probably only a local variety of Miliolina bicornis, 
the specimens possess remarkably uniform characters. All that have been met with 
are Triloculine, and have the flattened and ronnded contour and elongated mouth 
delineated in the figures. 
In a batch of sand collected on the shore at Tamatave, Madagascar, it is a not 
uncommon form, and except for a few examples from one of the Challenger Stations 
(Nares Harbour, 17 fathoms), this is the only point at which its occurrence lias been 
noted. 
(ZOOL. CHALL. EXP. PART XXII. 1883.) 
Y 23 
