KINGENA. 45 



Plate IV, figs. 17 and 19. Two specimens from the Chalk of Letheringsett, Norfolk, 



in the collection of Mr. C. B. Rose. 

 „ fig. 18. Another variety from Norwich, a shape similar to M. D'Orbigny's 



type of T. Hebertiana. 

 „ fig. 20. A specimen from the Chalk of Norwich, in the collection of Mr. 



Fitch. 

 „ fig. 20 ". An enlarged illustration ; this is the shape on which Mr. Woodward 



established his Ter. pentangulata. Similar specimens exist in 



the collection of the Museum at Cambridge, and in that of the 



Rev. T. Image, &c. 

 „ fig. 26. The smallest specimen we have observed. 



„ fig. 27. A young shell from the Chalk detritus of Charing (Kent), in the 



collection of Mr. Harris. 

 „ fig. 27 ai . An enlarged illustration. 



„ fig. 28. A young shell from the Upper Chalk of Pewsey (Wilts), in the 



collection of Mr. Cunnington. 

 „ fig. 2S ab . Enlarged figures. 



In many cases, I have given magnified illustrations of a small portion of the shell ; 

 these vary from different states of preservation, and from the spinose granulations being 

 more or less separate; it will likewise be observed, that in most specimens a dark 

 longitudinal line is seen to extend to a certain length along the smaller valve arising from 

 the internal septum, but it is not visible on specimens in a fine state of preservation, and 

 where the spinose granulation is perfect ; it seems probable that this species, when alive, 

 was slightly tinted with red, traces being discernible on many specimens in the Cambridge 

 Museum. K. lima has also been found in the Chalk of Sussex, by Messrs. Dixon and Catt, 

 and by myself in the Chalk Marl of Lewes. On the Continent, at Havre (Seine Inferieure), 

 at Chavot and Cesane, near Ay (Marne), &c. 



Genus — Terebratula, Lhwyd. 1698. 



Animal fixed to submarine bodies by means of a pedicle issuing from a foramen in the 

 beak of larger valve ; edges of the mantle thin, entire, and fringed by short cilia, vascular 

 system ramified, and situated on the mantle. Shell punctuated, variable in shape, 

 inequivalve, elongated or transverse; convex or depressed, beak more or less produced, 

 truncated by a foramen of variable dimensions, valves articulating by the means of two teeth 

 in larger and corresponding sockets in smaller valve ; internal riband-shaped lamella (partly 

 supporting the ciliated arms), attached only to the crura, short or elongated, and more or 

 less folded back on itself. 



