T. Davidson — On Tertiary Brachiopoda. 155 



4. Tbrebratula gbandis, Blum., PL VIII. Figs. 1, 2. 



This well-known species occurs abundantly in the " Etage Scaldi- 

 sien," "Sables gris a Bryozoaires" (Crag), at Antwerp, and from 

 whence M. Nyst has obtained a number of specimens with their 

 loop in a perfect state of preservation. This shell is also stated by 

 the same paleeontologist to occur perhaps likewise in the "Etage 

 Diestien" (=Upper Miocene) at Fort de Vieux Dieux, Antwerp. 

 In M. Dewalque's "Prodrome," M. Bosquet quotes the species 

 from the "Terrain Tongrien inferieur " of Limbourg, but that 

 distinguished palseontologist has recently informed me by letter 

 that this identification is more than doubtful, and that there exists 

 no positive evidence of the shell having been found in that formation. 



A young specimen (Fig. 2 of our Plate) is also quoted at p. 432 

 of M. Dewalque's " Prodrome," under the designation of Terehratula 

 cranium (Muller) ; but no example of that species has been found, 

 to my knowledge, lower down than the Pliocene, and the shell does 

 not occur in Belgium. 



5. Terebratula bisinuata, Lamarck, PI. VIII. Figs. 3, 4. 



T. hisinuata is a very rare species in Belgium, as well as in 

 England, but more abundant in the Paris basin. Two examples 

 only appear to have been hitherto found in the first-named kingdom. 

 Of these, one incomplete, but adult specimen (Fig. 3) was obtained 

 y M. Vincent from the "Sables Laekeniens inferieur," Dumont 

 = "Bruxellien Superieur" of Dewalque (=Barton clay sand), at 

 Dieghem, near Brussels. Another smaller example (Fig. 4), agreeing 

 with the var. succinea of Deshayes, was found by the late Dr. 

 Stacqney at Gand. 



6. Terebratula Kwksii, Galeotti, PI. VIII. Figs. 5, 6, 7. 



Galeotti, Mem. sur la Const. Geognostique du Brabant, Acad. 



des Sciences de Belgique, vol. xii. p. 151, pi. iv. 1837. T. 



trilobata, Galeotti, vol. xii. pi. iv. fig. 16. Tereb. Kicksii, 



Nyst, Coq. et Polyp, foss. de Belgique, p. 335, pi. xxix. 



fig. 4. 

 Galeotti's figures of this remarkable species are neither good nor 

 characteristic, and he gave the name Trilobata to fragments of the 

 rostral portions of the ventral and dorsal valves of his Tereb. Kichsii 

 (PL VIII. Fig. 7). The species was subsequently well described and 

 illustrated by M. Nyst. It varies a good deal in shape, and possesses 

 a short loop. It occurs in the "Laekenien inferieur," sables d'Assche 

 ( = Barton clay), at Gand; also at Dieghem, near Brussels. It is a 

 common shell in rocks of a similar age in Switzerland, and I have 

 picked it up at Cassel, near Dunkirk. 



7. Terebratulina gaput-serpentis, Linne, PL VII. Fig. 14. 

 This is a rare species in the Belgian Tertiaries. It was found by 



M. Nyst in the " Scaldisien " sables gris (Crag) near Antwerp. 



8. Terebratulina Putoni, Baudon, PL VII. Fig. 15. 



Baudon, Notice sur quelques Terebratules der Calcaire Gros- 

 sier, p. 16, pi. i. fig. 5, 1855. Deshayes, Desc. des An. 

 sans Vert, decouverts dans le Bassin de Paris, Sup. p. 149, 

 pi. 86, figs. 16-21. 



