852 
ME. W. K. PAEKEE AND PEOPESSOE T. E. JONES ON SOME 
we find the Hunde and Beechey Islands; Petersburg, U.S. (fossil; Miocene); and 
English Crag. 
This Lagena does not usually occur of so large a size as some of those from Hunde 
Islands. The most common condition is represented by figs. 28 & 29. These are 
smaller forms wanting the radiate structure of the aperture, but not separable from the 
type. Fig. 82 is a similar, but still smaller, form, and rather distorted. These feebler 
varieties of L. sulcata are common in all seas wherever Lagence are found. 
Plate XIII. fig. 24 is a rather small flask-shaped Lagena with costulse, having a spiral 
twist, which are intermediate in strength between the delicate riblets of fig. 23 and 
the strong ribs of the type-form, L. sulcata. The spiral arrangement of the costulse is 
very variable in different individuals collected from various places : the obliquity and 
curvature of these ornaments being greater or less; and, as usual, the riblets vary 
in length, even in the same individual, being sometimes short, and sometimes 
lengthened so as to creep upwards, twining round the neck as far as the mouth. The 
intervals or flutings (sulci) may have a width equal to, or be far greater than, the 
ridges or riblets. When very small the riblets have been mistaken for minute sulci or 
“ striae.” With regard to the rib-ornament of Lagena , we may observe that the costa- 
tion of the flatter varieties is sometimes reduced to a mere keel (as in the Cristellarian 
forms of Nodosarina ) ; either as a single keel ; or a larger marginal, and a secondary, 
pair ; thus making six costae crowded at the edge (as in Lagence common in the Ter- 
tiary beds of Grignon). A somewhat similar condensing of the ordinary riblets into a 
few (six and even three) large ribs takes place in the cylindrical Nodosarice. In one 
form of Lagena from the Grignon beds, we have three, meridional, three-edged, equal 
ribs ( L . trigono-marginata , Parker and Jones, Plate XVIII. fig. 1) ; and in another four, 
strong, equal, spiral ribs (marked by pseudopodia, as in L. striatopunctata ), this is our 
L. tetragona, Plate XVIII. fig. 14. 
Fig. 24 is one of the feeble forms of L. sulcata (type), world-wide, and acclimatized 
to nearly all latitudes and depths ; it is common at Hunde Islands (Dr. Sutherland), at 
CO -70 fathoms in shelly sandy mud. 
Plate XVI. figs. 6, 7, 7 a [including Var. caudata , D’Orb.] (North Atlantic). 
Various modifications of the typical Lagena , from the North Atlantic, are shown by 
figs. 6, 7 «, 7 b. Fig. 6 is like fig. 29 of Plate XIII., but it is rather more globose, has 
rather shorter ribs, and is apiculate (non-essential differences, though the last feature 
makes it Var. caudata , D’Orb.). Fig. 7 a is smaller and less globular than figs. 30 & 31 
of Plate XIII. 
These are rare and of middling size at 2330 fathoms, lat. 50° 25', long. 44° 19', North 
Atlantic; rare and small at 223 fathoms, lat. 52° 11', long. 13° 45' ; and rather common 
but small at 43 fathoms, lat. 51° 57', long. 10° 30'. 
Fig. 7 b (Var. caudata , D’Orb.) has an elongate olive-like shape, and thinner costae than 
the others. It was rare and of middle size at 1450 fathoms, lat. 50° 6', long. 45° 45' ; and 
rare and small at 2350 fathoms, lat. 51° 29', long. 38° 1', North Atlantic. 
