42 BRITISH CRETACEOUS BRACHIOPODA. 



extremity (r) under the shape of two nearly parallel longitudinal lamellae ; the inner ones 

 are very wide, and joined by a narrow arched process ; the loop is therefore three times 

 attached on either side. 



Fig. 8 illustrates the genus Kraussia 1 rubra, (Pallas, Sp.) Here the internal cal- 

 careous appendages consist only of two central diverging branches, somewhat spread out at 

 their ends. 



Figs. 5 and 6 illustrate Kingena lima, as well as fig. 15, PL IV. The last is 

 viewed more in front, to show the connection of the four branches or lamellae affixed to the 

 septum. The structure of the exterior, as well as the difference observable in the interior, 

 would not allow of Kingena lima being placed in the same section as Terebratella ; in the 

 latter, there exists always a more or less produced and distinct muscular fulcrum or boss, 

 which does not occur in either Kingena or Megerlia, where, on the contrary, a cavity or 

 depression is visible. I am only acquainted with the interior of one species, the Terebratula 

 lima of Defrance. It is probable that Ter. ovata, Sowerby ; T. rugulosa, Morris; and T. 

 squamosa, of Mantell, may belong to the same sub-genus ; but, not being acquainted with 

 their interiors, I think it for the present preferable to leave them under the genus 

 Terebratula, whence they may be removed when future discoveries will have made known 

 their internal arrangements. I have dedicated this sub-genus to Professor King, whose 

 researches have brought to light many interesting points connected with the history of 

 this most difficult class of Mollusca. 



15. Kingena lima, Defrance, Sp. Plate IV, figs. 15 — 28, and PI. V, figs. 1 — 4. 



Terebratula lima, Defrance. Die. d'Hist. Nat., vol. liii, p. 156, 1828. 



— pentangulata, Woodward. An Outline of the Geol. of Norfolk, tab. vi, 



fig. 10, 1833. 



— lima, D'Orbigny. Pal. Franc. Ter. Cre'tacees, vol. iv, p. 98, pi. 512, 



figs. 1—5, 1847. 



— Hebertiana, D'Orbigny. lb., p. 108, pi. 514, figs. 5, 11, 1847. 



— spinulosa, Morris. Annals and Mag. of Nat. Hist., vol. xx, Oct., 1847, 



p. 253, pi. xviii, figs. 6, 6". 



— lima, Bronn. Index. Pal., p. 1240, 1848. 



— sexradiata, Sow. in Dixon. The Geol. and Fossils of the Ter. and 



Cret. Form, of Sussex, pi. xxvii, fig. 10, 1850. 



— Hebertiana, D'Orb. Prodrome, vol. ii, p. 258, 1850. 



— lima, D'Orb. lb., p. 172, 1850. 



— — Gudranger. Bull. Soc. Geol. de France, vol. vii, p. 803, 1850. 



Diagnosis. Shell inequivalve, circular, oval, or irregularly pentagonal ; as wide as long, 

 or wider than long ; valves more or less convex ; larger or dental valve most so ; beak 



1 Genus Kraussia, Dav. 1852; five recent species are known, K. rubra, K. natalensis, K. pisum, 

 K. cognata ; the genus has not been noticed in the fossil state. 



