426 
THE VOYAGE OF H.M.S. CHALLENGES. 
The figured specimens were obtained, amongst others, from Humboldt Bay, Papua, 
37 fathoms; besides which, a few somewhat doubtful examples have been found at Station 
185, off Baine Island, Torres Strait, 155 fathoms. 
Bolivina costata, d’Orbigny (PL LIII. figs. 26, 27). 
Bolivina costata, d’Orbigny, 1839, Foram. Am^r. Merid., p. 62, pi. viii. figs. 8. 9. 
Most of the Challenger specimens of this species differ from the typical shell figured 
by d’Orbigny, loc. cit., in their more broadly oval outline, and in the smaller number of 
segments of which the test is composed. These, however, are comparative characters of 
no great importance. 
The oval variety above referred to occurs off Raine Island, Torres Strait, 155 
fathoms; in Humboldt Bay, Papua, 37 fathoms; and off Amboyna, 15 to 20 fathoms. 
The habitat given by d’Orbigny for the typical form is the Harbour of Cobija in 
Bolivia, where it is stated to be common. In Prof. W. K. Parker’s collection are a few 
small but characteristic specimens, from shallow-water pools at Eastbourne, Sussex. 
Bolivina amygdalceformis, H. B. Brady (PI. LIII. figs. 28, 29). 
Bolivina amygdalceformis, Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., N. S., p. 59. 
Test oval, compressed, almond-shaped ; ends obtuse or rounded, peripheral edge 
rounded. Segments few ; septation obscured by a surface ornamentation of stout, 
branching, longitudinal costae. Terminal chamber nearly smooth and conspicuously 
perforated. Aperture central, of long oval form, slightly constricted at the middle. 
Length, ^g-th inch (0'72 mm.). 
Found in sands dredged off the Philippine Islands, 95 fathoms ; off the Admiralty 
Islands, 16 to 25 fathoms ; off the north coast of Papua, 1070 fathoms; and in Torres 
Strait, 155 fathoms. 
Bolivina reticulata, Hantken (PL LIII. figs. 30, 31). 
Bolivina reticulata, Hantken, 1875, Mittbeil. Jahrb. d. k. ung. geol. Anstalt, vol. iv. p. 65, pi. xv. 
fig. 6, a.l. 
This species has a minute few-chambered test, of compressed rhomboidal shape, 
ornamented externally with an irregular network of raised lines. In the recent condition 
it seldom exceeds T ^th inch (0‘36 mm.) in length, but fossil specimens attain somewhat 
larger dimensions. I am indebted to my friend Herr v. Hantken for examples of the form 
as it exists in the Hungarian Tertiaries, and a comparison of these with the living shells 
obtained from the Challenger dredgings leaves no doubt that both belong to the same 
species. 
