324 MR EOBERT KIDSTON ON THE FOSSIL PLANTS OF THE 



Pecopteri's laciniata, Lebour, Illusir. of Fossil Plants, p. 59, pi. xxix. 



Pecopteris incisa, Sternb., Ess. fl. monde prim., vol. i. fasc 4, p. xx.; ii. p. 156, pi. xxii. 



Sphenoptens macilenta, var., Lebour (not L. and H), ibid., p. 39, pi. xix. 



Neuropteris heterophylla, Lebour (not Brongt.), ibid., p. 29, pi. xiv. 



Neuropteroid Frond, Lebour, ibid., p. 31, pi. xv. 



Pecopteris (Alethopteris) aquilina, Lebour (not Schloth.), ibid., p. 33, pi. xvi. 



Pecopteris (Alethopteris) marginata, Lebour (not Brongt.), ibid., p. 35, pi. xvii. 



Mariopteris nervosa, Zeiller, Bull. Soc. Geol. d. France, 3 e ser., vol. vii. p. 91, pi. v. figs. 1, 2. 



Mariopteris nervosa, Zeiller, Veget. foss. du terr. houil., p. 69, pi. clxvii. figs. 1-4. 



Pecopteris nervosa, Brongt., Hist. d. Veget. foss, p. 297, pi. xciv.; pi. xcv. figs. 1, 2.. 



Pecopteris nervosa, Heer, Mora foss. Helv., Lief i. p. 33, pi. xv. figs. 1, 2. 



Pecopteris nervosa, Lindley and Hutton, Fossil Flora, vol. ii. pi. xciv. 



Pecopteris nervosa, Schimper, Traite d. paleont. veget., vol. i. p. 513, pi. xxx. figs, 6, 7. 



Pecopteris nervosa, Sauveur, Veget. foss. d. terr. houil. Belgique, pi. xliv. fig. 1. 



Pecopteris nervosa, Weiss, Aus. d. Steinlc, p. 16, pi. xvi. fig. 98, 1882. 



Pecopteris nervosa, Achepohl, Niederrh. Westfdl. Steink., pp. 74, 76, 90, pi. xx. fig. 6 ; pi. xxiii. fig. 14 ; 



pi. xxviii. figs. 10-14. 

 Alethopteris nervosa, Geinitz, Vers. d. Steinkf. in Sachsen, p. 30, pi. xxxiii. figs. 2, 3. 

 Alethopteris nervosa, Boebl, Foss. Flora d. Steink.-Form. Westph., p. 77, pi. xxxi. fig. 7. 

 Alethopteris nervosa, Achepohl, Niederrh. Westfdl. Steink., pp. 57, 64, pi. xvi. fig. 1 ; pi. xviii. figs. 



15, 16. 

 Pseudopecopteris nervosa, Lesqx., Coal Flora, vol. i. p. 197, pi. xxxiv. fig. 1 (? figs. 2, 3). 

 Pecopteris subnervosa, Roemer, Palaont., vol. ix. p. 36, pi. viii. fig. 11. 

 Pecopteris subnervosa, Roehl, ibid., p. 90, pi. xiii. fig. 5. 



Diplothmema nervosum, Stur, Carb. Flora, vol. i. p. 384, pi. xxiv. fig. 1 ; pi. xxv6. fig. 2. 

 Pecopteris Sauveuri, Brongt., Hist. d. veget. foss., p. 299, pi. xcv. fig. 5. 

 Diplothmema Sauveuri, Stur, ibid., p. 380, pi. xxiv. figs. 2-4. 

 Pecopteris heterophylla, Sauveur (not Brongt.), ibid., pi. xlvii. 

 Sphenopteris acutifolia, Ett. (not Brongt.), Steinkf. v. Radnitz, p. 39, pi. xiv. fig. 2. 

 Pecopteris serra, Lebour (not L. and H), ibid., pi. xxii. 

 Diplothmema hirtum, Stur, ibid., p. 372, pi. xxxiv. fig. 1. 



Odontopteris, Achepohl, Niederrh. Westfdl. Steink., pp. 93, 95, pi. xxx. fig. 2 ; pi. xxxii. figs. 4, 5. 

 Odontopteris dentiformis, Achepohl, ibid., p. 93, pi. xxxi. fig. 6. 

 Odontopteris Reichiana, Achepohl (not Gutbier), ibid., p. 95, pi. xxxii. figs. 6-9. 

 Alethopteris conferta, Achepohl (not Sternb., sp.), ibid., p. 117, pi. xxxv. fig. 10. 

 Alethopteris acuta, Achepohl, ibid., p. 118, pi. xxxvi. fig. 6. 



Remarks. — This is one of the most polymorphic and widely distributed of coal- 

 measure ferns. The fronds were of large size, and the pinnules varied much in form 

 according to their position on the frond. This led to the creation of many species, which 

 have now been shown to belong to Mariopteris muricata ; of these, the two best marked 

 are forma nervosa and forma Sauveuri. They cannot, however, be regarded as varieties 

 in the true sense of the term, as their differences appear to depend on their position on 

 the frond, not on an inherent difference of growth. 



Mariopteris muricata occurs sparingly in the Upper Coal Measures, very plentifully 

 in the Middle Coal Measures, and though very frequent in the Lower Coal Measures, it 

 is scarcely so plentiful there as in the Middle Coal Measures. 



Locality. — Grange Colliery, Kilmarnock. 

 Horizon. — Shale over Stranger Coal. 



