166 
THE VOYAGE OF H.M.S. CHALLENGER. 
Miliolina trigonulci, and is in fact a true cosmopolite. It is one of the few Miliolce that 
were obtained from the most northerly sounding made on the last British North-Polar 
Expedition, in latitude 83° 19' N. ; and it was also present in the Austro-Hungarian 
soundings off Franz-Josef Land at about lat. 80° N. From these points southward to the 
Equator, and from the Equator southward to the Antarctic Ice-barrier (Station 155) it is 
found in every sea, and its bathymetrical range embraces depths varying from 6 fathoms 
to 2350 fathoms. It sometimes attains very large dimensions. A specimen from 
Station 24 — off Culebra Island, West Indies, 390 fathoms — measures more than -^-th inch 
(4 - 45 mm.) in length, and some of those dredged by Mr. Whiteaves in the Gulf of St. 
Lawrence are of almost if not quite equal magnitude. 
Its geological history is confined to the Tertiary epoch. It occurs in the Eocene 
beds of Grignon near Paris (Parker and Jones), in the Miocene deposits of Austria and 
Lower Bavaria (d’Orbigny, Reuss, Egger), in the Crag of the east of England (Jones, 
Parker, and Brady), in the Post-tertiary beds of Canada (Dawson), of Norway (Crosskey 
and Robertson), and of the west of Scotland (Robertson). 
Miliolina terquemiana, n. sp. (PL CXIV. fig. 1 , a. b.). 
Test elongate, tapering towards both ends, triangular ; salient edges sharp or 
subcarinate. Segments broad, the outer faces convex ; disposed on the Triloculine 
plan ; aperture subtriangular, with long appendicular tooth. Surface ornamented with 
fine parallel longitudinal costae. Length, Aoth. inch (0‘5 mm.). 
The general characters of this shell are those of Miliolina tricarinata, with the 
addition of the costate surface ornament. It is perhaps no more than a varietal 
modification, though quite distinct from the other striate and costate Miliolce. It has 
been named in honour of the veteran French rhizopodist M. Terquem. 
Miliolna terquemiana is exceedingly rare. Hitherto I have only seen specimens from 
two localities, namely, in shallow-water sand, dredged off Calpentyn, Ceylon, and in 
littoral sand from the east coast of Madagascar. 
Miliolina bertheliniana, n. sp. (PI. CXIV. fig. 2, a.b.). 
Test elongate, tapering at both ends, triangular ; salient edges sharp or subcarinate. 
Segments disposed in Triloculine manner, broad, convex externally ; surface decorated 
with an embossed reticulation. Aperture large, subtriangular or rounded, furnished 
with the Milioline tooth. Length, ^gth inch (0’4 mm.). 
This little shell may be regarded as a variety of Miliolina tricarinata, which it 
resembles in all respects except the surface ornamentation. I have much pleasure in 
