38 FORAMINIFERA OF THE CRAG. 



their mucronate or caudate representatives, so many of them are produced still further, 

 and have shells of fusiform contour, with both ends open for the passage of the larger pseudo- 

 podia. Specimens of this sort have been repeatedly figured, but their structural peculiarity 

 appears entirely to have escaped the notice of Continental rhizopodists. Seguenza's 

 genus Aniphorina seems, judging by his figures, to consist of subvarieties of Lagena 

 sulcata caudata and L. sulcata distoma; and an analysis of them will be found at p. 45, 

 vdth the remarks on a distomatous form we have from the Sutton Crag. 



The typical Lagena sulcata has a world-wide distribution, accommodating itself to 

 almost all climates and depths. The finest specimens are found at a depth of from 50 to 

 100 fathoms, but it is plentiful in the shallowest water, and has been found in soundings 

 as deep as 2350 fathoms in the Atlantic. 



Its distribution in time appears to have commenced with the Upper Chalk of Maes- 

 tricht. It is found in many of the European Tertiaries. 



In the Crag, L. sulcata is a common fossil. The specimens from Sutton are fine and 

 well marked ; those from the Cyprina-bed are large, but in the bed with Cardita and in 

 the Upper Crag at Thorpe the examples ar6 smaller. 



6. Lagena Melo, D'Orbigny. Plate I, fig. 35. 



OoLiNA Melo, D'Orb., 1847. Foram. Amer. M^rid., p. 20, pi. 5, fig. 9. 



Entosolenia squamosa, var. a, catenulata, Williamson, 1848, Ann. Nat. Hist., 2ud 



ser., vol. i, p. 19. pi. 2, fig. 20; 1858, 

 Rec. For. Br., p. 13, pi. 1, fig. 31. 



— — var. /3, scalariformis. Id. A. N. H., 2nd ser., 



vol. i, p. 19, pi. 2, figs. 21,22. 



— GLOBOSA, var. catenulata, Parker and Jones, 1857. lb., 2nd ser., 



vol. xix, p. 278, pi. 11, fig. 26. 

 OvuLiNA RETICULATA, Seguenza, 1862. Foram. Monotal. Miocen. Messin., p. 42, 



pi. l,fig. 11. 

 Lagena Melo, P. and /., 1862. Append. Carpenter's Introd., p. 309. 



— rovEOLATA, Rguss, 1862. Sitz. Akad. Wien., vol. xlvi, p. 332, pi. 5, fig. 65. 



— SCALARIFORMIS (parte), 7i5?. lb., pi. 5, fig. 71. 



CATENULATA, 7c?. lb., pi. 6, figS. 75, 76. 



— Melo, Brady, 1864. Trans. Linn. Soc, vol. xxiv, p. 472; 1865, Nat. Hist. 



Trans., North, and Durham, vol. i, p. 97. 



— SULCATA, var. (Entosolenia) Melo, P. and /., 1865. Phil. Trans., vol. civ, 



p. 354, pi. 13, figs. 33—36. 



Characters. — Shell ovato-globose or pear-shaped, usually Entosolenian. Surface 

 covered by reticulated ornament of longitudinal and transverse ridges, the transverse 

 being frequently less freely developed than the longitudinal bars. Colour white or dirty 

 white. Length ^J^th or less to 5!„th inch. 



Lagena Melo may be looked upon as intermediate between L. sulcata and L. squa- 



