JURASSIC AND TRIASSIC BRACHIOPODA. 175 



Length 10, width 7, depth 6 lines. 



>} y> >) O) ,, o ,, 



Obs. — I have seen five specimens of this species, collected by Mr. J. F. Walker from 

 the Lower Trigonia-grit (Inferior Oolite) at Leckhampton Hill, near Cheltenham. These 

 specimens varied a good deal in shape, some being comparatively shorter than others, 

 and somewhat pinched in laterally in the anterior half of the shell. Mr. Walker has 

 named this species after his friend Prof. Hughes, of Cambridge. 



158. Waldheimia Lycetti, Dav. Ool. Mon., p. 44, PI. VII, figs. 17—22; Sup., PI. 



XXIV, figs. 30, 31. 



This well-marked and interesting, species occurs in the lower portion of the Upper 

 Lias, or in the zones of Am. communis, A. bifrons, and A. jurensis. Mr. E. Deslongchamps 

 describes it at great length at p. 183 of his ' Brachiopodes Jurassiques.' He observes that 

 it is very constant in shape, and is of great geological importance on account of its strati- 

 graphical position in the lower portion of the Upper Lias, where species of Waldheimia 

 and Terebratula are very rare. He adds that it occurs in the lower beds of the Upper 

 Lias in France. It is found in England also at the same horizon, and is the only form 

 quoted from the Upper Lias by Prof. R. Tate in his paper on the ' Brachiopoda 

 of the British Liassic Formations.' In Normandy it makes its first appearance in 

 the Marls of the Upper Lias, characterised by Am. bifrons and Am. T/iouarsensis, and 

 acquires a larger size in the zone of Am. opalinus. The last appearance of this species 

 is, as far as we know, in the Infra-Oolitic Marls with Am. Murchisoni and Am. Soiverbyi. 

 It occurs also at Fontaine-Etoupe-Four and in several other localities. W, Lycetti was 

 for the first time collected from the Upper Lias of Barrington, near Ilminster. It is also 

 quoted by the Rev. F. Smithe in his valuable memoir ' On the Geology of Churchdown 

 Hill,' read before the Cotteswold Naturalist Club in August, 1861, from the zone of 

 Am. communis at Churchdown, where, according to the same authority, it is accompanied 

 by Rh. pyymcea, Ter. globulina, W. numismalis, Spiriferina Munsteri, Sp. Ilminsteriensis, 

 Leptmna Moorei, and L. Liasiana. Messrs. Beesley, 1 Griffin, and Walford, of Banbury, 

 have quite recently picked up a great number of fine large examples (Sup., PL XXIV, 

 figs. 30, 31) in a railway-cutting at Bloxam, near Banbury, in Oxfordshire (Banbury and 

 Cheltenham line). The rocks belong to the Am. communis zone of the Upper Lias, the 

 Cephalopod beds of the locality being the great feature of the section. Along with the 

 species under description the gentlemen above named found in the same bed Ter. punctata, 

 Rh. tetrahedra, Rh. jurensis, Rh. Bouchardii, and a smaller species of the same genus. 

 A Spiriferina, not complete enough for identification, was also found with the fossils 



1 Mr. Beesley has ascertained that W. Lycetti in the Banbury district does not occur higher up than 

 the Am. serpentinus zone, and is usually accompanied by Rh. jurensis. 



