260 MESSRS. G. W. LAMPLtTGH AND ,T. P. WALKER ON [May I903, 



of Devon. In France it occurs in the Cenomanian of Havre ; 

 the shells there are more finely-ribbed than the English shells, 

 and are nearer to our Shenley specimens. It is found in the 

 Tourtia of Essen (Westphalia) and at Dresden, and in the Upper 

 Gault of Ste. Croix (Switzerland). 



Rhynchonella Grasiana, var. shenleypjnsis, nobis. (PL XVIII, 

 figs. 9 a-9 c.) 



We will assign to our larger specimens the varietal name of 

 shenleyensis-, they are wider in proportion to their length. When 

 more specimens have been collected they may have to be separated, 

 and described as a new species. 



Dimensions: — length — 13*5 millimetres; breadth = 18*5 mm. ; 

 thickness = 105 mm. ; and the apical angle = 108°. 



Rhynchonella lineolata (Phillips). 



1829. Terebratula lineolata, Phillips, 'Geol. Yorks.' vol. i, p. 173 & pi. ii, fig. 27. 



1850. Terebratula Juqleri, Geinitz, ' Das Quadersandsteingebirge in Deutschland ' 



p. 208. 



1851. Rhynchonella lineolata, Davidson, c Brit.Cret. Brachiop.' Monogr. Pal. Soc. 



p. 98 & pi. xii, figs. 6-10. 

 1863. Rhynchonella lineolata, W. A. Oostev, ' Brach. Foss. des Alpes Suisses ' 



[Petrif. remarq. des Alpes suisses] p. 55 & pi. xix, figs. 1-4. 

 1868. Rhynchonella cf. lineolata, Schloenbach, in Benecke's Geogn.-Palaont. 



Beitriige, vol. i, p. 493 & pi. xxiii, fig. 4. 

 1872. Rhynchonella lineolata, Pictet, Mater, p. la Paleont. Suisse, ' Terr. Cret. 



Ste. Croix ' pt. v, p. 48 & pi. cc, fig. 14. 

 1872. Rhynchonella lineolata, Geinitz, ' Elbthalgebirge ' p. 167 & pi. xxxvi, fig. 36. 

 1874. Rhynchonella lineolata, Davidson, ' Brit. Cret. Brachiop.' Suppl. Monogr. 



Pal. Soc. p. 59; var. Carteri, ibid. p. 60. 

 1900. Rhynchonella lineolata, Jukes-Browne, ' Gault & Upper Greensand of 



England' Mem. Geol. Surv. p. 314. 



Most of the specimens figured in the memoirs quoted above appear 

 to belong to Rhynchonella lineolata, var. Carteri, Dav. This species 

 is very variable, as may be seen from Davidson's figures; but they 

 all show that the test is ornamented by numerous fine radiating 

 striae, which near the front of the shell are grouped so as to form 

 plaits at the front-margin, varying in number and in breadth. 



Our specimens closely resemble those found in the Greensand of 

 Cambridge, and show the same variations. Rh. lineolata, var. 

 Carteri occurs in the Greensand of Cambridge, the lied Chalk of 

 Hunstanton (Norfolk), and at Speeton (Yorkshire). 



On the Continent this species occurs in the Tourtia of Essen 

 (Westphalia) and at Dresden ; also in the Gault of Morteau (Switzer- 

 land). Davidson states that he has found it at Drap, near Nice 

 (France), in the Upper Neocomian. 



Rhynchonella lineolata (?) var. mirabilis, nobis. (PL XVIII, 

 figs. 7 «-7 6-.) 



We have obtained a remarkable specimen from Shenley, which 

 may be an extreme variety of this species. It differs from any 

 Rhynchonella that we have seen. 



The shell shows the same striae as Rh. lineolata ; its larger 

 valve has a very wide fold in the centre, which shows an angular 



