﻿white] the seeds of aneimites 325 



lobes of the reduced pinnules, the somewhat irregularly curved 

 and often bifurcated pedicles constituting the uppermost divisions of 

 the rachis. Seeds oval, rhombic, bilaterally symmetrical, the longi- 

 tudinal axis averaging 4.5 mm., the transverse being 2.5 mm., 

 rounded at the angles, slightly flatly obtuse at the apex and a little 

 concave at the point of attachment, from which ascends on either 

 side a narrow, striate, rather thick wing formed by a lateral dilation 

 of the outer fibrous envelope, about .3 mm. wide at the base, gradu- 

 ally attaining a maximum width of .75 mm. a little below the lateral 

 angle, narrowing somewhat abruptly above, and often difficult 

 of observation at the apex of the fruit; outer envelope of the seed 

 rugose by line, irregular, longitudinal striae, which often pass from 

 the lateral wing to the surface of the nutlet in the compressed speci- 

 mens, the seeds being also rarely traversed by numerous very 

 obscure ribs ; nutlet less distinctly rhomboidal, the lateral angles 

 being less pronounced. Microsporangiate organs not definitely 

 correlated. 



The sterile portions of this plant constitute an interesting type 

 which is at once recognizable by its open pinnation, the palmate or 

 fasciculate grouping of the divisions of the lower pinnules, and the 

 distinctly cuneate form, deep dissection, and thin texture of the 

 latter. The pinnules, which are usually somewhat obliquely trun- 

 cate-rounded, often present a Triphyllopteroid arrangement. A 

 marked specific peculiarity of the frond is the generally greater 

 breadth of the distal lobe of the pinnule or of the distal pinnule in 

 the fascicle. 



The general aspect of the foliage of the species is indicated by the 

 fragments illustrated in plate xlvii, figures 1 and 2, the pinnules of 

 the former being of nearly the largest proportions yet found in the 

 collections. Occasionally the pinnules are less compact and more 

 lax, while the fragment shown in plate xlviii, figure 2, represents 

 the maximum proportionate broadening yet observed in the smaller 

 pinnules. Between those of the larger ones shown in figures 1 and 2 

 of plate xlvii, on the one hand and the examples with very small 

 pinnules shown in plate xlviii, figures 1 and 3, or the smallest 

 observed, figure 3. plate xlvii, on the other hand, the sequence is 

 complete and irrefragible. The very small pinnules connected with 

 the fertile portions of the frond differ only in size from the larger 

 leaflets on the barren pinnae. The lamina, as indicated in the en- 

 larged details (plate xlvii, figures 2a and 2b, or plate xlviii, figure 

 3a) is very thin, the thread-like nerves being but slightly in relief 

 dorsallv. The dorsal surface is marked by verv fine striation and 



