. The Quarterly journal of the Geological Society of London. [A &B are of the natural by 2 diameters, and C by 9.] gnified Compare the segments of Sphenopteris fontainei Seward (94) pi. \i Vol. 69.] OCR KNOWLEDGE OF WEALDEN FLORAS. some specimens (for instance, A & E, text-fig. 4) the carbonizedcovering is broken at the distal end: there is, however, no decisiveevidence as to the nature of this structure, whether it is a capsuleor an inrolled fertile piece of lamina. The spore-masses, on sepa-ration from the covering and on treatment with macerating solution,show no indication of grouping into
. The Quarterly journal of the Geological Society of London. [A &B are of the natural by 2 diameters, and C by 9.] gnified Compare the segments of Sphenopteris fontainei Seward (94) pi. \i Vol. 69.] OCR KNOWLEDGE OF WEALDEN FLORAS. some specimens (for instance, A & E, text-fig. 4) the carbonizedcovering is broken at the distal end: there is, however, no decisiveevidence as to the nature of this structure, whether it is a capsuleor an inrolled fertile piece of lamina. The spore-masses, on sepa-ration from the covering and on treatment with macerating solution,show no indication of grouping into sporangial masses within thewhole group. Two of the spores are reproduced in PI. XIV, fig. 5,and text-fig. 2 B (p. 91). Text-fig. 4 E, below, represents in outlinepart of a carbonized covering, in which no cell-outlines are visible,with some of the spores beyond its ragged edge. Text-fig. 4 D Fig. 4.—Pelletieria valdensis : Acovering ; D —piece of axis ; 9 diameters.) -C, E, 4 F=spore-masses withG= pinnule. (Magnified by. is probably a piece of a forked axis. The surface-sculpturing of thespores is of the same type as in several Schizseaceous ferns: thespores of Mohria caffrorum Desv. have a diameter of 80 ju and thoseof Aneimia tomentosa Sw. a diameter of 110 p, as compared with60 to 70 [x in Pelletieria. Mr. Boodle x discovered numerous petrifiedspores in the tissues of the Wealden fern Tempslcya, 60 n indiameter, which bear a very close resemblance to those of spores of Schizceopsis, a genus already mentioned, which wasrecently instituted Berry for certain Potomac fossils originallydescribed by Eontaine as species of his genus Baieropsis, are verysimilar to that shown in PL XIV, fig. 5 : they have a diameter of100 p. Mr. Berry 2 regards the spore-masses of his fern—spindle-shaped bodies 4 mm. long and 1 mm. broad—as consisting of a Boodle (95). Berry (11) p. 195. 94 prof. a. c. sewaed: coxteibtjtiox to [March 1913,. large number of closely-pac
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
