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THE VOYAGE OF H.M.S. CH ALLEN GEE. 
name has often been used by Parker and Jones, and for this I propose to retain their 
specific designation. As compared with Trochammina ochracea, the species in question 
is larger and more conical, has fewer segments, usually four or five in the outermost 
convolution, and on the inferior surface they present a nearly triangular outline, — it 
furnishes, in point of fact, the links connecting Trochammina with Valvulina. 
Trochammina ochracea, Williamson, sp., is a very minute form, seldom exceeding 
Y^j-th inch (0'25 mm.) in diameter; plano-convex and depressed in shape, and composed 
of a large number of segments, usually seven or eight in the peripheral whorl ; the seg- 
ments though small are very distinct, but not generally so regular as shown in Williamson’s 
drawing of the upper surface of the test. On the inferior side the septal lines are 
“ arcuate, flexuose, and very prominent.” This species is not uncommon in the British 
seas. 
Trochammina squamata, in the restricted sense, occurs on both the British and Irish 
coasts, and has also been obtained from dredgings at two points in the North Atlantic, 
west of Ireland, 110 and 173 fathoms respectively, and off Culebra Island, West Indies, 
390 fathoms. It has been taken at the mouth of the Bio Plata, South America, 13 
fathoms ; and at five Stations in the South Pacific, 41 to 1100 fathoms. 
One of the figures in Dr. Karrer’s series of fossil Trochamminince from the Early Tertiary 
Sandstones of Vienna belongs pretty certainly to this species ; and from a manuscript list 
communicated by Dr. B. Haeusler I learn that it is found in almost every zone of the 
Jurassic formation of the Canton Aargau in Switzerland. 
Trochammina injiata, Montagu, sp. (PI. XLI. fig. 4, a.-c.). 
Nautilus inflatus, Montagu, 1808, Test. Erit., Suppl., p. 81, pi. xviii. fig. 3. 
Rotalina injiata, Williamson, 1858, Rec. For. Gt. Brit., p. 50, pi. iv. figs. 93, 94. 
Rotalina ( Trochammina ) injiata, Parker and Jones, 1859, Ann. and Mag. Nat. Hist., ser. 3, 
vol. iv. p. 347, F. 
Trochammina injiata, Carpenter, 1862, Introd. Foram., p. 141, pi. xi. fig. 5. 
„ squamata, var. injiata, Parker and Jones, 1862, Introd. Foram., Appendix, p. 310. 
,, injiata, Brady, 1865, Nat. Hist. Trans. Northd. and Durham, vol. i. p. 95. 
„ „ (?) Tate and Blake, 1876, Yorkshire Lias, p. 452, pi. xvii. fig. 18. 
Test free ; trochoid or convex, depressed, Botaliform ; consisting of about three con- 
volutions, the outermost of which is formed of five or six very ventricose segments with 
deeply excavated septal lines. Inferior face somewhat concave, with sunken umbilicus ; 
peripheral margin lobulated. Aperture small, arched ; situate on the inferior side of the 
final segment, close to the previous convolution, a little within the periphery. Colour 
pale brown, the small primary segments much darker than the rest. Diameter, ^th 
inch (0'7 mm.). 
