254 APPENDIX TO THE SUPPLEMENTS TO 



Obs. — This important and well-marked species was for the first time discovered by 

 M. Moriere at St. Honorine-des-Perthes, near Port-en-Bessin, Normandy, in beds named 

 by M. dc Caumont, " Calcaire marneux de Port-en-Bessin," and which, according to M. 

 Deslongchamps, correspond with the Inferior Oolite of Normandy, or rather the white 

 bed lying immediately above the ferruginous Oolite of Bayeux. It thus characterises 

 the zone of Am. Parkinsoni. 



In 1851 the shell was forwarded to me by M. Deslongchamps, for description and 

 illustration, with the MS. name T. Morierei. In England the first specimen was dis- 

 covered in 1878 by Mr. J. P. Walker, in the Inferior Oolite of Bradford- Abbas in Dor- 

 setshire, and subsequently other examples were collected by Mr. D. Stephens, Professor 

 Buckman and his son, Mr. Kent, Rev. G. P. Whidborne, and others, but it is by no means 

 a common species. It is easily distinguishable from Terebratula coarctata and T. reticu- 

 laris by the absence of a mesial fold in the dorsal valve, as well as by the absence of 

 radiating striae, and from T. Uybrida by the absence of radiating lines. 



2. Terebratula hybrida, E. Desl. Dav., Appendix to Supplements, Vol. V, PI. 



XVIII, figs. 12 and 12 a, b, c. 



Terebratula hybrida. E. Desl. Catalogue descriptif du Brach. du Systeme Ool. 



Inf. du Calvados, Bull. Soc. Linn, de Normandie, 

 vol. ii, pi. iv, fig. 7, 1857. 



— — — Pal. Fran9aise, Brachiopodes Jurassiques, p. 247, 



pi. lxvi, figs. 1—6, 1874. 



— — S. S. Buckman. Proc. of Dorset Nat.-Hist. Club, vol. iv, 



p. 24, 1882. 



Shell subpentagonal, about as wide as long. Dorsal valve very moderately convex, 

 somewhat flattened, with a deep median sinus bordered by a rounded rib ; ventral 

 valve much deeper and more convex than the opposite one, with also a deep sinus 

 commencing at the beak and extending to the front ; beak slightly incurved and trim, 

 cated by a large circular foramen, separated from the hinge-line by a small narrow delti- 

 dium. Surface of valves covered with numerous radiating raised striae, crossed at right 

 angles by concentric lines, giving the surface an elegant reticulated or trellis-like 

 appearance. 



Length 7, width 7 lines. 



Obs. — This species by its shape is closely allied to Ter. Morierei, but differs from it 

 in its exterior sculpture, its valves being covered with radiating lines, as well as by con- 

 centric ones. It differs also from Ter. coarctata by the presence of a mesial sinus in 

 both valves. Terebratula hjbrida was found by M. E. Deslongchamps in the White 

 Oolite reposing on the Inferior Oolite of Bayeux, at St. Honorine-des-Perthes near Port- 



