252 MESSRS. G. W. LAMPLUGH AND J. Jf. WALKEK OX [May I903, 



1874. Terebratula Moutoniana, Davidson, 'Brit. Cret. Brachiop.' Suppl. Monogr. 

 Pal. Soc. p. 42 & pi. iv, figs. 11-13. 



1883. Terebratula Moutoniana, var. brickhillensis, Keeping, ' Fossils & Pal. Affin. 



of Neocom. Deposits of Upware & Brickhill ' [Sedgw. Prize Essay] p. 162. 



1884. Terebratula Moutoniana, var. brickhillensis, Davidson, ' Brit. Oret. Bracliiop.' 



App. to Suppl. (vol. v) Monogr. Pal. Soc. p. 251 & pi. xviii, fig. 8. 



This species varies considerably in different localities. The 

 Shenley specimens seem to be intermediate between the Upware 

 and Brickhill forms. The test is smooth, exhibiting faint traces of 

 striae ; the front margin shows a wide fold, the centre of the smaller 

 valve being convex ; the larger valve is depressed towards the 

 front. This species and its varieties occur in the Aptian of France 

 and Switzerland, as stated by various authorities. We have some 

 specimens from the Tourtia of Tournay (Belgium) which closely 

 resemble some of the Shenley shells ; these have been regarded as a 

 variety of Terebratula Eobertoni, d'Archiac, but differ from his 

 figure in having the smaller valve more globose, while the larger 

 valve is slightly depressed towards the front margin. 



Our specimens vary in the depth of the wide fold at the front 

 margin, and in the relative length compared with the breadth ; but 

 we require more specimens before we can consider whether these 

 should form a distinct variety. 



The dimensions of a Shenley specimen are as follows: — length = 

 25 millimetres; breadth = 19 mm. ; thickness = 11*75 ; and the 

 apical angle = 72°. 



Terebratula Boubei, d'Archiac. (PI. XVII, fig. 5.) 



1847. Terebratula Boubei, d'Archiac, 'Fossiles du Tourtia' Mem. Soc. Geo!. 



France, ser. 2, vol. ii, p. 320 & pi. xix, fig. 11. 

 1864. Terebratula Boubei (?) C.J. A. Meyer, Geol. Mag. vol. i, p. 252 & pi. xii. 



figs. 5-7. 



A Terebratula which occurs at Shenley appears to belong to this 

 species. It is oval, elongated ; the valves equally convex, showing 

 lines of growth : surface smooth ; beak elongated, slightly recurved, 

 truncated by a circular foramen ; the smaller valve shows a faint 

 wide fold : the front margin is slightly angular, but in young 

 specimens it is rounded. 



Mr. Meyer stated that he found single valves in the pebble- 

 bed around Godalming, in Surrey, which may belong to this 

 species. T. Boubei occurs in the Tourtia. near Tournay (Belgium). 

 This species is not mentioned in Yon Decken's list of the 

 brachiopoda which occur in the Tourtia of Westphalia. 



Dimensions: — length = 24'5 millimetres; breadth = 16*2 mm. ; 

 thickness = 11 mm. ; and the apical angle = 50". 



Terebratula ovata, Sowerby. (PI. XVII, figs. (J a & (j b.) 



1812. Terebratula ovata, J. Sowerby, ' Min. Ooncli.' vol. i, p. 46 & pi. xv, fig. 3. 

 1847. Terebratula lacrtimosa, A. d'Orbigny, ' Pal. Franc. Terr. Cret.' vol. iv, p. 99 



& pi. dxii, figs. 6-11. 

 1852. Terebratula, ovata, Davidson. ' Brit. Cret. Bracliiop.' Monogr. Pal. Soc. p. 47 



& pi. iv. figs. 6-13. 



