APPENDIX.' 



During the latter period of the pubHcation of my Monograph on the British Fossil 

 Trigonia? and subsequently, the fossils of the Inferior Oolite of Oxfordshire were brought 

 very fully under my notice ; these were found to contain three new species of Trigonice, 

 T. Guisei, JFaJfordi, and TFindoesi, four varieties of T. signata, kg., which I have here 

 named at pages 5 — 10, Zietenii, rugulosa, Stutterdi, and decurtaia. Three of the 

 varieties, viz. rugulosa, Stutterdi^ and decurtata, appear to be unknown at other British 

 localities. These discoveries have resulted from the labours of several local investigators. 

 The fine collection of Oxfordian fossils made by Mr. Stutterd, of Banbury, and now placed 

 in the Oxford University Museum, has stimulated, as might be expected, the exertions of 

 other observers ; of these may be mentioned Mr. E. A. Walford, P.G.S., of Banbury, 

 and Mr. J. Windoes, of Chipping Norton, who, for several years past, have been ardent 

 searchers of Oxfordshire Inferior-Oolite fossils. Owing to their kind consideration I 

 have had the advantage of comparing their cabinets with those of my old friend Mr. 

 Witchell, of Stroud, who has so long worked in the same formations in the Cotteswolds, 

 more especially in the higher beds in the vicinity of Stroud. The results are novel and 

 interesting, and are embodied in the descriptions of the figures in Plates I — IV of this 

 Supplement. In addition I am enabled to illustrate a previously undescribed, but well- 

 marked Inferior-Oolite variety of a recognised Great-Oolite species, as well as a variety 

 of a foreign Lower-Oolite species hitherto unknown in Britain (if not a new species 

 itself). Also further illustrations of three Inferior-Oolite species, and one from the Lias, 



Trigonia signata, Jg., var. Zietenii. Trigon. Supplement, Plate I, figs. 3, 4, 5, 16, 17, 



and Plate IV, fig. 7. 



Trigonia signata is illustrated in the previous portion of this Monograph (page 29, 

 Plate II, figs. 1, 2, 3) by three specimens, two of which are from the Cotteswold Hills, 

 the other from the north-eastern coast of Yorkshire ; they all exemplify a single variety, 

 for which I propose the name Zietenii. In Yorkshire this Trigonia is the sole variety 



1 The manuscript of the Appendix did not come into the possession of the Palseontographical Society 

 until some time after the lamented author's death. Tlie explanations of the plates, and the localities 

 have been revised by Mr. E. A. Walford, F.G.S. 



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