REPORT ON THE EORAMINIFERA. 
423 
Bolivina cenariensis, Costa, sp. (PI. LIII. figs. 10, 11). 
Brizalina cenariensis, Costa, 1856, Atti dell’ Accad. Pont., vol. vii. p. 297, pi. xv. fig. 1, A. B. 
Bolivina cenariensis, Brady, 1882, Proc. Roy. Soc. Edin., vol. xi. p. 711 — Table. 
So far as can be made out from the drawing, the shell described by Costa in the 
Paleontologia del regno di Napoli, loc. cit., under the name Brizcilina cenariensis, is 
a tolerably regular, elongate, compressed, tapering Bolivina, with entire margin and 
sharp peripheral edges, and terminating in a spine at the initial end. Two lines traver- 
sing the face of the test longitudinally, described by the author as two internal tubular 
syphons, have the appearance of delicate costae, and closely resemble the central riblets 
of fig. 11. The similarity of Brizcilina to Bolivina in all important characters is 
admitted in the description of the genus ; and it may be observed that the superficial 
costae are of little value as a distinctive feature of the species, inasmuch as they vary both 
in number and in length, and are sometimes entirely wanting. 
The best specimens of Bolivina cenariensis hitherto met with in the recent condi- 
tion are from the North Atlantic. It is not uncommon in dredged material from the 
area lying west and north-west of Ireland, and from the Faroe Channel, at depths 
ranging from 85 fathoms to 1630 fathoms. Less characteristic examples have been 
obtained from the Philippine Islands, 95 fathoms; from the south coast of Japan, 15 
fathoms ; and off the mouth of the Rio de la Plata, 13 fathoms. 
Costa’s specimens were from the later Tertiary beds of Casamicciola in the Island 
of Ischia. 
Bolivina decusscita, H. B. Brady (PI. LIII. figs. 12, 13). 
Bolivina clecusscita, Brady, 1881, Quart. Journ.. Micr. Sei. , vol. xxi., N. S., p. 58. 
Test elongate, compressed ; broad and obliquely truncate at the oral end, and tapering 
to a rounded point at the aboral extremity ; peripheral edge thick, square or slightly 
rounded, lobulated. Segments numerous, nine or ten in each series ; septation indistinct 
or entirely concealed externally. Surface beset with low prominences or bosses, which 
are rounded or subangular in outline, and arranged with some regularity in oblique rows, 
about four to each row. Length, -g^th inch (0'5 mm.). 
This somewhat striking little species occurs at two points in the South Pacific, namely, 
— at Station 300, north of Juan Fernandez, depth 1375 fathoms, where it is abundant, and 
at Station 302, south-west of the same island, depth 1450 fathoms, where it is compara- 
tively rare. 
