46 



PENNSYLFANI/1N SPORES OF ILLINOIS 



at least some of the spores of Raistrickia are 

 filicinean in origin and possibly from the 

 family Schizaeaceae. 



The following description of the genus 

 Raistrickia is based on seven previously pub- 

 lished species and nine new species: Spores 

 are radial, trilete, and round to subtriangu- 

 lar in transverse plane. The known size 

 range is from 37 to 90 microns. The orna- 

 mentation is usually spinose, setaceous, or 

 coarsely verrucose. The spines or setae 

 vary considerably in length, width, and 

 shape. Further, the apex of the spines or 

 projections of some species are variously 

 partate. The trilete rays may be distinct 

 or inconspicuous, short or long, and the 

 rays and commissure are usually poorly 

 developed. One species may possess an 

 area contagionis. The spore coat varies in 

 thickness from two to six microns. 



The following are new species from Illi- 

 nois coal beds : 



1. Raistrickia aculeata 



2. R. protensa 



3. R. crinita 



4. R. crocea 



5. R. imbricata 



6. R. irregularis 



7. R. pilosa 



8. R. prisca 



9. R. rubida 



Raistrickia aculeata sp. nov. 

 Plate 10, figure 9 



Description. — Spores are radial, trilete, 

 originally spherical, and with numerous 

 long, slightly tapering blunt spines. The 

 dimensions of the holotype spore body are 

 65.1 X 69.3 microns and the known size 

 range is from 62 to 74 microns. The tri- 

 lete rays are inconspicuous owing to 

 numerous spines. The rays range in length 

 from 19 to 23 microns. The lips and com- 

 missure are poorly developed. The spore 

 coat varies in thickness from 2 to 2.5 mi- 

 crons. The spines are numerous and close- 

 ly spaced. They vary in length from 7.3 

 to 10.5 microns and in width from 2 to 

 2.7 microns. Minor folding of the spore 

 is a common feature. 



Holotype.— Maceration 490-A Slide 5, 



McCleary's Bluff coal bed (3 J/2 inches) 

 Wabash County, Illinois. 



Discussion. — R. aculeata sp. nov. is 

 characterized by numerous long, narrow, 

 tapering, blunt spines. 



Raistrickia protensa sp. nov. 



Plate 11, figures 1-3 



Description. — Spores are radial, trilete, 

 round in transverse plane, and have charac- 

 teristic club-shaped, partate projections. 

 The spore coat occasionally has minor folds 

 and the projections are frequently folded or 

 twisted. The dimensions of the holotype 

 spore body are 58.8 X 60.9 microns, and the 

 known size range is from 54.5 to 63.8 mi- 

 crons. The trilete rays are definite and 

 those of the" holotype vary in length from 

 18.5 to 22. The lips are thin and poorly 

 developed. The commissure is either nar- 

 row or wide. The spore coat is usually 

 more than 2 and less than 3 microns thick. 

 The club-like projections, when viewed in 

 a median transverse plane, have one major 

 division, each division minutely divided, 

 resulting in as many as 5 divisions and 6 

 papillate knobs. The club-like projections 

 vary in length from 12.5 to 17.9 microns. 

 In width the projections are narrowest at 

 their base and vary from 4 to 7 microns, 

 and at the apex of those in true median sec- 

 tion, from 12 to 14.7 microns. Irregulari- 

 ties in the shape of the projections is thought 

 to be due to folding, preservation, or over- 

 maceration. 



Holotype.— Maceration 474-A Slide 8, 

 No. 6 coal bed, Franklin County, Illinois. 



Discussion. — Partate spines or projec- 

 tions within the genus Raistrickia are 

 thought to indicate a rather close relation- 

 ship between species sharing this unique 

 feature. 



Raistrickia crinita sp. nov. 

 Plate 11, figure 7 



Description. — Spores are radial, trilete, 

 roundly triangular in transverse plane, and 

 have numerous blunt to tapering spines. 

 The holotype spore body dimensions are 

 61.9 X 58.3 microns, and the known size 



