102 A. E. Trueman — The Lias of South Lincolnshire. 



Montlivaltia vmcronata, Dune. D. sp. 



M. Hawiei, Chap. & Dew. Frondicularia intuviescens, Born. 



Extracrinus Brita7inicus, Sch. F. cf. Terquenii, d'Orb. 



Serpula sp. J', sp. 



Ditrypa etalensis, Piette. GlanduUna sp. 



Cytheridea sp. G. ['>)paucicosta, Boem. 



Holothuroid plates. Lingulina tenera, Born. 



Cristellaria ef. compressa, d'Orb. Marginulina reversa, T. & B. 



C. crepidula, F. & M. Miliolina {Spirillma) sp. 



C. recta, d'Orb. Nodosai-ia radicula, Linn. 



C. rotulata, Lam. N. sp. 



C. varians, Born. cf. Noniojtina sp. 

 Dentalma communis, d'Orb. Orbulina universa, d'Orb. 



D. glandulosa, Terq. Textularia sp. 



Judging from a less complete list of fossils Mr. B. Smith * was 

 able to infer the presence of representatives of the zones' from 

 oxynotus to jamesoni. From the above it is now possible to assert 

 that the beds from Oppel's zone of A. oxynotus to that of A. ibex are 

 represented. The record oi Deroceras davcei, Sow., from Old Dalby ^ 

 suggests that still higher beds are present, but the specimen bearing 

 that name in the Leicester Museum, to which the record presumably 

 refers, is wrongly identified, being simply a species of Lytoceras. 



The association of fossils from such diverse horizons on a single 

 heap, or series of heaps, is rather confusing, but it must be remembered 

 that the material composing the heaps has been accumulated from 

 some two hundi'ed feet of clay, whicb is approximately the thickness 

 of the zones named in Yorkshire. It was pointed out by Quilter,' 

 however, that species are to some extent confined to definite parts of 

 the spoil heaps. Thus, on the lower spoil heap may be found fossils 

 from the oxynotus zone, with numerous Gryphece, Pholadomya, and 

 Corals, while the upper heap is rich in Platypleuroceras, Poly- 

 morphites, Tragophylloceras, and crinoid stems from the ibex zone 

 {valdani zone of Buckraan). The clays on the heaps at the Saxelby 

 end of the tunnel doubtless represent the upper part of the ibex 

 zone, but they are less fossiliferous. 



The upper part of the Lower Lias ( Oistoceras sub-zone) is exposed 

 at Waddington Brick Pit, a few yards east of the railway station. 

 About twenty feet of blue shales are here seen, weathered yellow at 

 the top. The nodules are very fossiliferous, each containing one or 

 more Capricorn ammonites, chiefly Oistoceras Jiguliniim, 0. omissum, 

 and 0. curvicorniim. " Atidroyynoceras" cf. capricornum, Wt., and 

 Amblycoceras crescens, Hyatt, are also common. A single specimen 

 of the zone fossil, Deroceras davosi, was also found here ; apparently 

 this is the most northerly English record for this fossil, which is 

 fairly common in beds of this age in the South of England. 



Fossils. 

 Deroceras davoei. Sow. (very scarce). 0. figuUnum, Simps, (abundant). 

 Oistoceras omissum, Simps, (abun- Amblycoceras crescens, Hyatt (not 

 dant). uncommon). 



^ B. Smith, Geology of Melton Motobray (Mem. Geol. Surv.), 1909, p. 37. 

 ^ 0. Fox- Strang ways, Geology of Leicester (Mem. Geol. Surv.), 1903, p. 108. 

 ^ H. E. Quilter, " Lower Lias of Leicestershire " : Geol. Mag., Dec. Ill, 

 Vol. Ill, p. 59, 1886. 



