REPORT ON THE EORAMINIFERA. 
201 
suspicion. The diameter of the test seldom exceeds -^yth inch (1'26 mm.), and small 
examples are often less than one-fourth of that size. 
Cornuspira involvens occurs at between twenty and thirty Challenger Stations, 
the list including localities in the North and South Atlantic, the Southern Ocean, and the 
North and South Pacific. It was found in the most northerly sounding made on 
the last British North-Polar Expedition (lat. 83° 19' N.), and in the material obtained 
by the Austrian Expedition, off Franz- Josef Land and in Barents Sea. In point of 
fact it is cosmopolitan. Its ordinary bathymetric range appears to be from 7 fathoms 
to 700 fathoms, but in two cases the depth recorded is much greater, namely, 1325 and 
1900 fathoms respectively. 
The geological history of the species extends to the early portion of the Tertiary epoch. 
It has been found in the Septaria-clays of Offenbach and Hermsdorf in North Germany 
(Reuss), in the Baden Beds of the Vienna Basin (Reuss), in the Clavulina-Szaboi Beds of 
Hungary (Hantken), in the Crag of Suffolk (Searles Wood), and in the Boulder-clay 
of the north-east of Ireland (Wright). 
Cornuspira ccirinata, Costa, sp. (PI. XI. fig. 4, a.b.). 
Ojperculina carinata, Costa, 1856, Atti dell’ Accad. Pont., vol. vii. p. 209. pi. xvii. fig. 15, A.B. 
Cornuspira carinata , Seguenza, 1862, Atti dell’ Accad. Gioenia di Sci. Nat., vol. xviii. p. 93. 
„ bornemanni, Reuss, 1863, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlviii. p. 39, 
pi. i. fig. 3, a. b. 
„ marginata, M. Sars, 1868, Vidensk.-Selsk. Forhandl., p. 249. 
The general characters of Cornuspira carinata are those of Cornuspira involvens, 
but the lateral faces of the test are somewhat less concave, and the peripheral margin is 
bordered by a well-defined narrow keel. The diameter is about -^-th inch (L0 mm.). 
It is a somewhat rare variety, isomorphous with Spirillina decorata in the hyaline series. 
Specimens of the Cornuspira marginata of M. Sars, with which Prof. G. O. Sars has 
been good enough to supply me, have the same characters as Costa’s species. 
Cornuspira carinata has been found at two Challenger Stations, namely : — 
off Culebra Island, West Indies, 390 fathoms ; and off Raine Island, Torres Strait 
155 fathoms, but only one or two examples in either case. The figured specimen 
is from one of the “Porcupine” dredgings in the North Atlantic, 1630 fathoms. The 
species is less rare on the coast of Norway, and has been obtained from the Lofoten 
Islands (Sars), and from the Hardanger Fiord (Norman) ; it has also been found in the 
Bay of Naples (Seguenza), and at depths of 70 to 120 fathoms in the Mediterranean 
(Robertson). 
Its earliest appearance, geologically speaking, is in the Septaria-clays of North Ger- 
many (Reuss) ; and its occurrence at several localities in the later Tertiary deposits of 
Italy and the adjacent islands is recorded by Costa and Seguenza. 
