494 
THE VOYAGE OF H.M.S. CHALLENGES. 
character of an independent genns, Psecadium, under which name the tapering and 
elliptical forms have each been parcelled out into a number of “ species.” Some of 
these anomalous specimens are interesting as connecting links with the ovate or subglobular 
varieties of Cristellaria, such as the Cristellaria obvelatci of Reuss (Haidinger’s Naturw. 
Abhandl., vol. iv. p. 33, pi. iii. fig. 11); but from any other point of view they are of 
very little consequence. 
Nodosaria ( Gl .) Icevigata, in one form or other, is an almost cosmopolitan species, but 
it is especially abundant in the northern portion of the North Atlantic, the tapering and 
pointed varieties being most frequently met with. The area of distribution extends from 
lat. 79° 45' N. in Smith Sound, to Magellans Strait, about lat. 53° S. The North 
Atlantic Stations show a range of depth from 50 to 1360 fathoms, those in the South 
Atlantic, from 350 to 1025 fathoms, the North Pacific, 7 to 95 fathoms, the South 
Pacific, 28 to 1070 fathoms, the Red Sea, 30 to 372 fathoms, and the Southern Ocean, 
one sounding only, 1375 fathoms. The rounded and oval forms are less widely distributed 
than the tapering varieties, though moderately common in the North Atlantic and the 
South Pacific. The subcylindrical modification with flush sutures has only been met 
with in the North Atlantic. 
In the fossil condition the species makes its appearance in the Upper Trias (Jones 
and Parker), and is found in microzoic formations -of almost every succeeding geologi- 
cal age. 
Nodosaria (Gl.) armata, Reuss (PI. LXIII. fig. 6). 
Glandulina armata, Keuss, 1865, DenkscLr. d. k. At ad. Wiss. Wien, vol. xxv. p, 137, pi. ii. 
fig. 28. 
„ „ Id. 1870, Sitzungsb. d. k. Ak. Wiss. Wien, vol. lxii. p. 477, No. 6 ; — 
Scblicht, 1870, Foram. Pietzpuhl, pi. vi. fig. 4. 
The test of this species, as figured by v. Reuss and v. Schlicht, is nearly elliptical, slightly 
pointed at the primordial end, and with a somewhat protruding mammillate aperture. The 
final segment occupies about one-half of the visible shell, and its inferior margin is armed 
with a ring of equidistant pointed tubercles or bosses, which form a line round the middle 
of the test. The number of these tubercles is stated by Reuss to be nine or ten, but 
the figured specimens to which he refers appear to have nine and fourteen respectively, and 
they are set with extreme regularity. In the very few recent specimens that have 
come under my notice, the exostoses are neither so numerous nor so regular as 
depicted in these drawings. 
Nodosaria (Gl.) armata has been obtained from one of the “ Porcupine” dredgings in 
the North Atlantic, depth 725 fathoms. 
So far as at present known its occurrence as a fossil is limited to the Septaria-clay of 
Pietzpuhl, in Germany. 
