L AMELLIBK ANCHI ATA. 113 



Localities. Upware, Brickliill, Potton, Tealby, Farringdon. 

 N. Europe. Hils Congloraerat, Schoppenstedt, &c. 

 S. Europe. St Croix, Haut Jura, Lower and Middle Neo- 

 comian. 



Spondylus KoEMERr, Deshayes. 



Spondylus hystrix, Roemer (non Goldfuss), Kordd. Kreidegeb. 



p. 59. 

 Spondylus Roemeri of French authors ; vide D'Orb. Pal. Fr. 



Terr. Cret. in. p. 655, pi. xlv., f. 1 — 6. 

 „ „ Pictet and Campiche, Terr. Cret, St Croix, 



p. 256. De Loriol, Mt. Saleve, p. 107, pi. 



xiv., f. 4, 5. 



A very variable shell, having very much the general appearance 

 of the figure of 8. hystrix Goldfuss (Pet. Germ. pi. cv., f. 8), but his 

 description (p. 96), shews it to be perfectly distinct. The spines on 

 the larger ribs vary much in number and in prominence, while 

 some specimens are devoid of spines altogether. The ribs are 

 rather closer set than in the figures by D'Orbigny and De Loriol 

 above referred to. 



The lower valve is smaller, flattened and marked with strong 

 growth lamellae over its broad base ; its upturned border is covered 

 with numerous simple-rounded ribs without spines. 



Localities. Brickhill. 



JV". Europe. Schoppenstedt, Hils Conglomerat. 



S. Europe. St Croix and Mt. Saleve, Mid. Neocomian ; 



Range. Valengien, Urgonien. 



Teigoxia Upwarensis, Lycett. 

 Trigonia spinosa of fossil lists from the Upware deposit. 

 Walker, ' Coprolite Workings in the Fens,' 

 Geol. Mag., 1867, p. 310. 

 Trigonia Upwarensis, Lycett, Monog. Brit. Foss. Trigonias, Pal. 



Soc. p. 143, pi. xxxix., f. 4. 

 I believe this species also occurs in the ' derived ' blocks of dark 

 irony grit rock at Upware ; but these specimens are not well 

 preserved. 



Locality. Upware (not uncommon). 

 k. R 



