52 



PALEOZOIC FOSSIL SPORES 



obviously are only incomplete contents of single 

 sporangia) gives a little additional information 

 on the Calamospora fructification. 



The holotype is from slide Y of maceration 

 90, deposited in the Illinois Geological Survey 

 collections, Urbana. 



2. Calamospora laevigatus (Ibrahim) S. W. 

 and B., comb. nov. 



Laevigati-sporites laevigatus Ibrahim, 



1933, Sporenformen des Aegirhorizonts, pp. 

 17-18, pi. 4, fig. 46. 



Laevigati-sporites laevigatus Ibrahim, 

 Loose, 1934, Inst. Palaobot. Arb., vol 4, 

 no. 3, p. 146, pi. 7, fig. 2)6. 



(Calamitif )-sporites laevigatus (Ibra- 

 him) Wicher, 1934, idem, vol. 4, no. 4, p. 

 172. 



3. Calamospora microrugosus (Ibrahim) S. 

 W. and B., comb. nov. 



Sporonites microrugosus Ibrahim, 1932, 

 Neues Jahrb., Beilage-Band 67, Abt. B., 

 p. 447, pi. 14, fig. 9. 



Laevigati-sporites microrugosus (Ibra- 

 him) Ibrahim, 1933, Sporenformen des 

 Aegirhorizonts, etc., p. 18, pi. 1, fig. 9. 



4. Calamospora mutabilis (Loose) S. W. 

 and B., comb. nov. 



Calamiti( ?) -sporonites mutabilis Loose, 

 1932, Neues Jahrb., Beilage-Band 67, Abt. 

 B., p. 451, pi. 19, figs. 50a-c. 



Calamiti(?)-sporites mutabilis (Loose) 

 Loose, 1934, Inst. Palaobot. Arb., vol. 4, 

 no. 3, p. 145. 



5. Calamospora (?) obesus (Loose) S. W. 

 and B., comb. nov. 



Sporonites obesus Loose, 1932, Neues 

 Jahrb., Beilage-Band 67, Abt. B., p. 451, pi. 

 19, fig. 49. 



Laevigati-sporites obesus (Loose) Ib- 

 rahim, 1933, Sporenformen des Aegirhori- 

 zonts, etc., p. 19. 



Laevigati-sporites obesus (Loose) Ib- 

 rahim, Loose, 1934, Inst. Palaobot. Arb., 

 vol. 4, no. 3, p. 145. 



6. Calamospora pallidus (Loose) S. W. and 

 B., comb. nov. 



Sporonites pallidus Loose, 1932, Neues 

 Jahrb., Beilage-Band 67, Abt. B., p. 449, 

 pi. 18, fig. 31. 



Punctati-sporites pallidus (Loose) Ib- 

 ^ rahim, 1933, Sporenformen des Aegirhor- 

 izonts, p. 21. 



Punctati-sporites pallidus (Loose) Ib- 

 rahim, Loose, 1934, Inst. Palaobot. Arb., 

 vol. 4, no. 3, p. 146. 



7. Calamospora perrugosus (Loose) S. W. 

 and B., comb. nov. «, 



Laevigati-sporites perrugosus Loose, 



1934, idem, p. 145, pi. 7, fig. 13. 



Genus Reinschospora S. W. and B., 

 gen. nov. 

 Plate 2, figures 11-llb; text fig. 2 



This genus appears to include the spores 

 Reinsch (1884) designated as his Sub- 

 divisio III of his Subtribus I, Nucleus 

 triangularis. The genus is therefore ap- 

 propriately designated in honor of 

 Reinsch. His description (loc. cit. p. 7) 

 of the subdivision is as follows (free 

 translation from Latin) : 



Exospore thin (1/24-1/40 of the transverse 

 diameter), smooth or ornamented with granules 

 disposed variously in regular series. Body mar- 

 gins armed with a simple series (sometimes 

 duplicate) of dentiform juxtaposed spines, 

 gradually decreasing (in length) from the cen- 

 tral margins toward the angles. 



This diagnosis has no taxonomic status 

 although it (and others given by Reinsch) 

 may be quite v^orthy of validation. One 

 naturally hesitates to apply names on the 

 basis of Reinsch's descriptions and fig- 

 ures because of uncertainty as to the 

 sources and present location of the types. 

 Also, modern interpretations may vary 

 considerably from his as to the signifi- 

 cance of certain morphologic features. 

 The point which should be emphasized is 

 that much of Reinsch's work is of value 

 in extending our knowledge of spore 

 form variation, particularly when essen- 

 tial confirmation can be obtained from 

 additional material recently prepared. 

 Thus the forms Reinsch described in his 

 subdivision III are structurally clarified 

 by study of American forms of Reinscho- 

 spora and there is little doubt that three or 

 four still unnamed species have been dis- 

 covered in his studies. However, there is 

 no particular occasion to propose names 

 for these until similar new material is at 

 hand or the source defined for his old 

 types (if they are preserved) and their 

 character confirmed. The following new 

 generic diagnosis has been constructed 

 on the basis of newer work but it also 

 takes cognizance of the structural fea- 

 tures unmistakably shown by Reinsch. 



Symmetry. — Spores radial, trilete. 



Shape. — Body lenticular to flattened el- 

 liptical in the axial plane; subtriangular 

 in transverse plane, corners rounded, sides 

 slightly convex or concave in outHne. A 

 fimbriate flange, broadest in the inter- 

 radial region and very narrow or absent 

 on the corners, may be present to modify 



