Ralph Tate — New Secondary Brachiopoda. 551 



This neat shell is distinguished by its slight subpentagonal form 

 and small umbo ; its nearest ally is W. indeniata. W. perforata has 

 been long known in Great Britain; Portlock confounded it with 

 Terebratula ornithocephala. In the Bristol Museum, I found it in 

 1860 labelled T. punctata, with which species it has more frequently 

 been confounded. 



On the Continent it ranges throughout the Lower and Middle 

 Lias, but appears to be most abundant in the inferior part of the 

 Lower Lias ; its distribution in this country is much the same. 



Ammonites angulatus zone. Island Magee and Glenarm, Co. 

 Antrim (Tate). 



A. BucJclandi zone. Horfield, Ashley, Bedminster, Keynsham 

 (Tate), and Salford (Wright) near Bristol; Camerton, Shepton Mallet 

 (Moore); Wells (Brodie). 



Belemnites acutus zone. Ballintoy, Co. Antrim (Tate). 



Am. spinatus zone. Wellingore Cutting, Lincolnshire (Judd).^ 



2. Tekebratella liasina, Deslongchamps (1853) id. Mem. Soc. 

 Lin. deNormandie (1856). 



3. Megerlia Perrieri, Deslong. 



4. Megerlia Suessii, Deslong. 



The three last species, with some others which characterize the 

 remarkable deposit in the Middle Lias at Fontaine-Etoupe-four, 

 Normandy, were discovered by Mr. C. Moore, at Whatley, near 

 Frome. 



5. Zellania obesa, Moore. Quart. Journ. Geol. Soc, vol. xxiii., 

 p. 240. Lower Lias (zone of Am. angulatus?), Stout's Hill (Moore). 



Zellania Laboucheri (Moore) and Z. Davidsoni (Moore) have oc- 

 curred to Mr. Moore in the Lower Lias, Brocastle, etc., as well as in 

 the Inferior Oolite. 



6. KiNGENA ? Deslongchampsi, Davidson (Terebratula). An. 

 Mag. Nat. Hist., vol. v., pi. 15, f. 6 (1850). Middle Lias, Whatley 

 (Moore). 



Theoiditjm triangulare D'Orbigny. This species till recently 

 was only known in the Inferior Oolite, but Mr. C. Moore records it 

 from the Lower Lias of Brocastle, Keynsham, etc. ; the Middle Liaa 

 Ilminster ; Upper Lias, Charter House mine ; Fuller's Earth, Comb 

 Down, Bath ; and from the Coral Rag. 



7. Thecidium granulostjm, Moore. Trans. Nat. Hist. Soc, Somer- 

 setshire, 1854, p. 13, t. 2, f. 1-6. Middle Lias, Whatley, and In- 

 ferior Oolite, Dundry' (Moore). 



8. Thecidium subserratxjm, spec. nov. Shell subquadrangular, 

 attached by the whole of the lower surface of the ventral valve, the 

 front of which is much elevated ; area triangular, narrow, hinge 

 line long and straight. Dorsal valve convex smooth, inflated at the 

 umbo, interior with a plain border, within which is a raised serrated 

 margin, from which arises a longitudinal medial lanceolate septum, 



1 Waldheimia Maria, d'Orb, regarded by Mr. DaTidson as a variety of W. cornuta, 

 is described as a distinct species by E. Deslongchamps Pal. Fr. t. 20, f. 1-7 ; it occurs 

 in the Marlstone of Ilminster. 



