552 



Ralph Tate — Nero Secondary Brachiopoda. 



occupying two-thirds the length of the shell; the muscular de- 

 pressions are smooth (?). 



Theeidium subserratum, sp. nov. 



a. Shell seen in profile. 



b. Perfect shell, showing exterior of dorsal valve, etc. 

 e. Interior of dorsal valve. 



This species is related to T. rusticum, T. granulosum, and T. 

 triangidare, but presents a combination of characters which dis- 

 tinguishes it from them. Locality, Brocastle (zone of Am. angulatus). 

 Possibly T. triangulare, Moore (apud D'Orbigny), from the same 

 beds, belongs here. Lower Lias (zone of Am. angulatus), Brocastle 

 (Tate). 



9. Spirifeeina oxyptera, Buvignier. Mem. de la Soc. Philom. 

 de Verdun, vol. ii., p. 14, t. 8, f. 8 (1843). Lower part of Middle 

 Lias, Mull. (Geikie). 



10. Spikiferina veeruoosa, De Buch [Delthyris). Petrif. 

 remark, t. 7, f. 2 (1831). 



This species, included by Mr. Davidson under S. rostrata, is now 

 regarded by most palgeontologists as distinct. It characterizes the 

 zone of Ammonites Jamesoni, and is found at Cheltenham, Aston, 

 etc., in North Gloucestershire. Middle Lias, Eadstock, &c. Though 

 ranging throughout the upper part of the Lower Lias in Germany 

 and France, it has not yet been met with in beds of that formation 

 in this country.^ 



11. Spirifeeina Deslongchampsi, Davidson. An. Nat. Hist. 

 (1862), t. 15, f. 4. Middle Lias, Whatley (Moore). 



12. Spiriferina oxtgona, Deslongchamps. Bull. Soc. Lin. de 

 Normandie, t. 3, f. 5-10 (1858). Middle Lias, Whatley (Moore). 



13. SuESSiA iMBRiCATA, Deslougchamps. Annuaire 1' Institut des 

 Provinces, t. 1, f. 12-16 (1855). 



This genus was, until Mr. Moore's discovery, unknown in British 

 strata. Middle Lias, Whatley (Moore). 



14. Lept^na rosteata, Deslong. Annuaire I'lnst. des Provinces, 

 t. 1, f. 17-18 (1855). Middle Lias, Whatley and Munger (Moore). 



15. Ehynchonella plicatissima, Quenstedt sp. Handb. Petref., 

 t. 36 (1852). 



B. anceps, pars Chapuis and Dewalque (1854). 

 B. costellata, Piette (1856). 



^ According to E. Deslongchamps, three varieties of S. rostrata, described by Mr. 

 Davidson, are distinct species, and are respectively named S. Hartmanni, Ziet, 

 iS. piiiguis, Ziet, and S. ascendens, E. Deslong; they occur in the Marlstone of 

 Somersetshire. 



