FERNS— INGERT.E SEDIS— APHLEBIA. 105 



from the other associated forms hj tlie narrow, regularly pinnatifid and 

 rigid, thick, fibrous divisions, ending in very slender spinous lobes. 



Xocrt/;7/e.s.-Pitcher's coal mine, U. S. Nat. Mus., 5572, 5573, 5575 ; 

 Deepwater mine, a doubtful fragment, U. S. Nat. Mus., 5574. 



Aphlebia crispa (Gutb.) Presl. 



1835. Fucoides crisjnis Gutbier, Abdriicke, p. 13, pi. i, figs. 11, 11a (pi. vi, tig. 18!). 

 1838. Aphlebia crispa (Gutb.) Presl, iu Steruberg: Versuch, vol. ii, fasc. 7-8, p. 112. 

 1886. AplileMa crispa (Gutb.) Presl, Zeiller, Fl. foss. bouill. Valenciennes, Atlas, pi. li, 



flgs. 1, 2; text (1888), p. 304. 

 1838. ScUzopteris Lactuca Presl, in Sternberg: Versucb, vol. ii, fasc. 7-8, p. 112. 

 1855. ScUzopteris Lactuca Presl, Geinitz, Verst. Steink. Sachsen, p. 19, pi. xxvi, fig. 1. 

 18G9. Schizopteris Lactuca Presl, von Eoehl, Foss. PI. Steink. Westphalens, p. 47, pi. 



xviii. 

 1881. Schizopteris Lactuca Presl, Weiss, Aus d. Fl. d. Steink., p. 17, pi. xviii, fig. 111. 

 1869. Rhacophyllum Lactuca (Presl) Scbimper, Traite, vol. i, p. 684, pi. xlvi, fig. 1 



(uec fig. 2, necque pi. xlvii, figs. 1, 2); vol. iii (1872), p. 524 (excl. syn.). 

 1878. Bhacophylhm Lactuca (Presl) Scbimp., Andrews, Eleni. Geol., p. 17G, fig. 317. 

 1880. Rhacophyllum Lactuca (Presl) Scbimp., Lesquereux, Coal Flora, vol. 1, p. 315 



(pars). 

 1869. Rhacophyllum speciosissimum Scbimper, Traite, vol. 1, p. 68o. 

 1885. Eawlea 3Iiltoni (Brongn.) Stur, Fame d. Carbon-Fl., p. 108 (pars), pi. Ix, figs. 



3,4. 

 1890. An ScUzopteris rUpis Grand 'Eury, Geol. pal. basin bouill. Gard, p. 299, pi. 



xix, fig. 10? 



The type of ApUebia, to which the names Fucoides crispus, Rhacophylhmi 

 Lactuca, and B. speciocissimwn were applied by Gutbier, von Roehl, and 

 Schimper, respectively, is represented by several fairly good specimens 

 transmitted by Dr. Britts to the National Museum. All show the typical 

 characters of the species, the best illustration of which was given by Major 

 von Roehl.^ Von Roehl's figure is important not only for its size and per- 

 fection of expression, but because of its representation of the variation 

 between the basal and distal portions in the same individual. 



Specimens from Missouri, probably belonging to this species, are found 

 among the manuscript material left by Professor Lesquereux under the label 

 " Bhacophyllum Lactuca var. crispum Gut." The species occurs also in fine 

 specimens over the coal at Buchtel, Ohio. 



ApUebia crispa is not difficult of distinction from the other species of 



'Foss. n. Steinkohlenf. \Vfst)ih:ileiis, ]).47, ]il. xviii. 



