GOES: FORAMINIFERA. 81 
This species varies in the marginal contour from elliptic to nearly circular. 
The white gloss of the surface and the shape of the aperture suggest proximity 
to some forms of Biloculina. 
Caribbean Sea. 300-1069 fathoms ; rare. 
S. celata Costa. 
Spiroloc. celata Costa, 1854, Paleont. Napoli, Pl. XXVI. Fig. 5. 
Spiroloc. celata Costa, 1855, For. Vaticano, Mem. Napol., II. p. 126, Pl. I. Fig. 14. 
Quinqueloc, asperula See., 1862, Rhizop. Catania, Accad. Gioenia Atti (2.), XVIII. 
p. 118, PI. II. Fig 6. 
Planispirina celata Br., 1884, Chall. Rep., IX. p. 197, Pl. VIII. Figs. 1-4. 
Sigmoilina celata ScuLumg., 1887, Genre Planispir., Bull. Soc. Zool. Fr., XII. p. 111, 
Pl. VII. Figs. 12-14. 
2 Quinqueloc. rugosa S.] AG., 1866, For. Kar Nikob., Novara Reise, Geol., Th. II. 
p. 203, Pl. IV. Fig. 16. 
The figure of Spiroloculina celata given by Costa in the Paleontology of Napoli 
is not quite satisfactory for a reliable identification; but as it on the whole in 
its outlines agrees with Brady's designs in Chall. Rep., this author may be jus- 
tified in identifying his form with that of Costa. 
The genus Sigmoilina of Schlumberger has been founded on the regular 
semispiral arrangement of the segments; but such a disposition of the chambers 
will be observed to take place in most species of Quinqueloculina, the chief 
difference being usually the greater number of segments in each semi-spiral; 
but even that characteristic does not hold good in the newly founded genus. 
Caribbean Sea. 200-1000 fathoms; not common. 
MILIOLINA. (LwcK.) PARK. € JONES. 
M. seminulum Lin. 
This species becomes in deep water usually broader and with more sharp 
margin than in the shallow-water form. Such broad forms have been recorded 
under different names, as Quinqueloc. triangularis D'OrB. (Bass. tert. Vienne, 
p.288, Pl. XVIIL Figs. 7-9); also represented by Parker and Jones, and 
Brady’s Crag Foramf., Paleont, Soc., XIX. Pl. IV. Fig. 1, Pl. VI. Fig. 2, and 
by Bornemann under the name of Quingueloc, Ermanni (Septar. Thon Herms- 
dorf, Zeitschr, deutsch. geol. Gesellsch., VII. p. 351, Pl. XIX. Fig. 6), and so 
on. When the margin becomes very sharp keeled, it has been subject to new 
names, as Quinqueloc. Buchiana, Ungeriana, Partschü, longirostra D'ORB. (Bass. 
tert. Vienne), and Lamarckiana, Cuvieriana, Auberiana D'OrB. (For. Cuba). 
Tn Chall. Rep. (Pl. V. Figs. 8, 9) Brady has conferred the name Miliolina 
Auberiana upon a broad triangularis with sharp margins, but which in other 
respects does not exactly agree with d’Orbigny’s figure. 
Such forms are found together with triangularis, intermediate forms being 
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