References
- For No. XXIII. see Ann. & Mag. Nat. Hist. March 1887 177 177
- 1886 . Ann. & Mag. Nat. Hist. , April : 343 – 343 .
- For the list of strata examined, see Ann. & Mag. Nat. Hist. ser. 5 xvii 344 344 and Proceed. Geol. Polytech. Soc. West Riding, Yorkshire, vol. ix. part 2, pp. 229–234.