50 FORAMINIFERA OF THE CRAG. 
DENTALINA STRIATISSIMA, Stache, 1865. Novara-Exped., Geol. Theil, I Band, II Ab- 
theil., p. 200, pl. 22, fig. 38. 
Noposartia (DEeNnTALINA) Lupwtiet, Reuss, 1866. Denks. Math.-Nat. Cl. Akad. Wissen., 
vol. xxv, p. 19, pl. 2, fig. 23. 
Characters—Shell straight, subcylindrical, taperimg, composed of a few largish 
chambers, and externally ribbed from end to end by stout parallel ridges. ‘The con- 
strictions marking the septal lines are sometimes concealed by the overgrowing longi- 
tudinal coste. Liable to become either curved or compressed, or both, with more or less 
excentric aperture ; and thereby passing into either Dextalina or Marginulina. 
Length 3th to 3th inch and more. 
It would be impossible to define exactly the limits between Wodosaria raphanus and the 
two forms which follow it on our list, V. raphanistrum and JN. scalaris. All are straight 
Nodosarians, and have longitudinal coste. That there is a considerable amount of 
varietal distinction, the examination of a few specimens of each would satisfy any observer, 
and is confirmed by the peculiarities of distribution. In general terms, we may say that 
the species now under consideration (V. raphanus) is the bold, few-chambered, coarse- 
ribbed, and tapering form; JV. raphanistrum is a longer and more cylindrical shell, with 
a larger number of segments, and the ribs more neatly put on; and JV. scalaris is a few- 
chambered, more delicate, and transparent shell, seldom growing to a large size, and 
commonly having an extended neck produced from the terminal chamber. 
A specimen from Sutton (Lower Crag) and one from Thorpe (Upper Crag) are the 
only evidences we have of this species in the Crag; nor is it an abundant form anywhere, 
except in the Adriatic, where it is frequently Marginuliniform (like our fig. 21), and is 
associated with arcuate or Dentaline varieties. 
In the Lias clays VV. raphanus is sparingly found where the other Wodosaring are very 
common ; and in other Secondary and many Tertiary formations it is to be met with. 
Professor Williamson figures a broken specimen (fig. 43) from the British seas, but 
does not give the locality; and we have one or two examples from deep water (70 to 
80 fathoms) off Shetland, and several from a similar or greater depth in the Hebrides. It 
occurs in the North Atlantic (78 fathoms) ; South Atlantic (Abrolhos Bank, 260 fathoms) ; 
and in the Mediterranean and Adriatic seas ; but well-developed specimens are rare. 
2, NopOSARIA RAPHANISTRUM, Linz., sp. Plate I, figs. 6—8. 
NAUTILUS RAPHANISTRUM, Linn., 1758. Syst. Nat., 10th ed. p. 710, No. 242; 1767, 
Syst. Nat., 12th ed., p. 1163, No. 282. 
NavriLus cos‘ratus, var., Montagu, 1808. ‘Test. Brit. Supp., p. 83, pl. 19, fig. 2. 
ORTHOCERA RAPHANISTRUM, Lamarck, 1822. An.s. Vert., p. 594, No. 3. 
— —_ De Blainville, 1824. Dict. Sc. Nat., vol. xxxvi, p. 486. 
Noposaria Baciiium, Defrance, 1825. Ib., vol. xxxv, p. 127; vol. xxvi, p. 487, Atlas 
Conch., pl. 13, fig. 4. 
