TEREBRATULA. 73 



shape and dimensions, with the type figured by Viscount D'Archiac, from the Tourtia 

 near Tournay (Belgium). The same French author states to have likewise collected the 

 species in a bed of Upper Green Sand, above the Gault, near Wissant (Pas-de-Calais), 

 France. 



Plate IX, fig. 25. Ter. Bobertoni, from Farringdon, in the collection of Mr. Lowe. 



32. Waldheimea (Terebratula) Celtica, Morris. Plate IX, figs. 32 — 35. 



Terebratula longa, Reenter. Verst. Nordd. Ool., p. 50, pi. ii, fig. 11, 1836; Kreid., 

 p. 44, No. 50, 1840. (Not T. longa, Zieten, 1832.) 



— — Morris. Annals Nat. Hist., vol. xx, p. 255, pi. xix, fig. 1, 184/. 



— faba, TPOrbigny. Pal. Franc., Ter. Cretaces, vol. iv, p. 77, pi. xiv, 



figs. 10. (Not T.faba, Sow., Trans. Geol. Soc, vol. iv, p. 14, 

 fig. 10, 1836.) 

 Waldheimea Celtica, Morris. MS. Catalogue of the Terebratulse in the British 



Museum, p. 62, 1853. 



Diagnosis. Shell oblong, elongated oval, ventricose posteriorly, becoming rather 

 attenuated anteriorly, and subtruncate ; valves nearly equally convex, ventral valve some- 

 what keeled ; beak slightly produced, and obliquely truncated by a foramen of moderate 

 dimensions, partly surrounded and separated from the hinge line by a small deltidium 

 in two pieces ; beak ridges more or less defined • dorsal valve most inflated near the 

 umbo ; margins even ; surface smooth, marked only by a few concentric lines of growth. 

 Loop elongated, reaching to near the frontal margin before becoming reflected. Shell 

 structure punctated. Length 17, breadth 10, depth 8 lines. 



05s. This form was described and figured by Rcemer, in 1836, under the name of 

 T. longa y 1 but Zieten had already made use of the same denomination to designate a 

 Jurassic Terebratula from Donsdorf. 2 



In 1847, the species under notice, was discovered by Dr. Fitton and Mr. Morris, in 

 hard ferruginous nodules of the Lower Green Sand at Horseledge and Yellowledge, near 

 Shanklin Bay (Isle of Wight), and published under Rcemer's denomination ; but Mr. 

 Morris having subsequently found that the shell differed specifically from the Jurassic 

 type, has proposed for it the name of Ter. Celtica. 



M. D'Orbigny commits another mistake, while considering T. longa (Rcemer) the 

 same as T. faba of Sowerby ; but the author of the ' Palseontologie Francaise ' was 

 not probably aware that the so-termed T. faba (Sow.) is itself only a variety or dwarf 

 example of the well-known T. biplicata (Brocchi), from the Upper Green Sand of 



1 Roemer appears to have figured and described in his 'Die Verst. der Nord Oolithen Gebirges,' 1836, 

 a series of Fossils belonging to the Hils Conglomerate, but which he considered at that epoch, as Jurassic, 

 amoug these, we find his T. longa. The author has subsequently corrected this mistake in his monograph 

 of the Chalk of that country. 



2 'Die Verst Wurtembergs, pi. xxxix, fig. 7. 



