57 4 
THE VOYAGE OF H.M S. CHALLENGER. 
Uvigerina urnula, d’Orbigny, 1846, For. Foss. Vien., p. 189, pi. xi. figs. 21, 22. 
„ irregularis , Brady, 1865, Nafc. Hist. Trans. Northd. and Durham, vol. i. p. 100, pi. xii. 
fig. 5. 
„ proboscidea, Sell wager, 1866, Novara-Exped., geol. Theil, vol. ii. p. 250, pi. Hi. 
fig. 96. 
„ farinosa, Hantken, 1875, Mittheil. Jahrh. d. k. nng. geol. Anstalt, vol. iv. p. 62, pi. vii. 
fig. 6. 
With some allowance for variability of outline, the Uvigerina canariensis of d’Orbigny 
serves as a good type of the smooth-shelled members of the genus. Such forms are not 
nearly so common as the costate and aculeate species, and it is seldom that their tests are 
quite so regularly triserial as depicted in the original figure. Sometimes the earlier 
segments are faintly ribbed externally, as shown in cl’Orbigny’s drawings of Uvigerina 
urnula, but this is a character of so little importance that it is not even mentioned in the 
Latin description of that form. 
The distribution of the species, so far as at present known, is as follows : — off Bermuda, 
435 fathoms; shore-sancl Teneriffe (d’Orbigny); South Atlantic, east of Buenos Ayres, 
1900 fathoms; off the Cape of Good Hope, 150 fathoms; and at five Stations in the 
South Pacific, 40 fathoms to 1375 fathoms, notably amongst the islands on the west 
coast of Patagonia. It has been found both by Mr. Sicldall and myself on the British 
coast, and by the Rev. A. M. Norman in the North Atlantic, on the line of the Falmouth 
and Lisbon telegraph-cable. 
D’Orbigny ’s fossil specimens ( Uvigerina urnula ) were obtained from the Miocene of 
the Vienna Basin; vonHantken’s {Uvigerina farinosa), from the lower Clavulina-szaboi 
beds of Ofen, Hungary ; and Schwager’s ( Uvigerina proboscidea ) from the Pliocene of 
Kar Nicobar. I have also a note of its occurrence in the Crag of the east of England. 
Uvigerina tenuistriata, Reuss (PI. LXXIV. figs. 4-7). 
Uvigerina tenuistriata, Reuss, 1870, Sitzungsb. d. k. Ak. Wiss. Wien, vol. lxii. p. 485. — Scblickt, 
1870, Foram. Pietzpuhl, pi. xxii. figs. 34-36. 
Von Schlicht has figured {loc. cit.) specimens very similar to those portrayed in 
PI. LXXIV. figs. 6, 7, but scarcely so well characterised ; and von Reuss has assigned to 
them the name Uvigerina tenuistriata, adding a remark, that, after all, it is very possible 
the species is only a finely striate variety of the polymorphic Uvigerina pygmeea. In 
this latter view I entirely coincide; nevertheless the variety is better defined than many 
forms generally accepted as distinct, and it has in addition some peculiarities of 
distribution. 
Uvigerina tenuistriata occurs in the Southern Ocean, off Heard Island, 75 fathoms; 
amongst the islands on the west coast of Patagonia, 40 to 140 fathoms; off Raine 
Island, Torres Strait, 155 fathoms ; and off the Philippine Islands, 95 fathoms. 
