190 KANSAS ACADEMY OF SCIENCE. 



PLATE XVII. 



(a) Leptobryum pyriforme Linn., x 10, from Nebraska, (b) A dry capsule, 

 (c) The base of seta, with unfertilized archegonia and paraphyses. (d) 

 Operculum, (e) Part of the edge of lid. (f) Part of the peristome, showing 

 two outer teeth, one carinate segment, with cilia between, (g) Part of annu- 

 lus. (h and i) Leaves, (j) Basal cells, (k) Apex. (1) Male plant, (m) Fe- 

 male, (n) Calyptra. (o) Perichaetial leaf, (p) Apex enlarged, (q) Middle 

 cells, (r) Basal cells. 1, m, n, o, p, q and r from an immature Kansas speci- 

 men. 



PLATE XVIII. 



(a) Sterile plant of Webera albicans Sch., x 3. (b) Stem leaf, (c) Upper 

 branch leaf, (d) Apex of upper leaf, (e) Cells of the leaf, (f) Fruiting 

 specimen of Webera albicans, from California, x 2. (g) Leaf, (h) Basal cells, 

 (i) Upper cells, (j) Capsule and operculum, x 4. (k) Perichaetial leaf. (1) 

 Apical cells, (m) Part of Peristome, both inner and outer, (n) Spores show- 

 ing oil drops, diameter 18-23 mmm. 



PLATE XIX. 



(a) Bryum argenteum Linn., x 5. (b) Branch, with male flower, (c) Oper- 

 culum, (d) Part of both inner and outer peristome, (e) Annulus cells, (f) 

 Branch leaf, (g) Stem leaf, (h) Perichaetial leaf, (i) Cells, (j) Bryum 

 caespiticium Linn., x 4. (k) Male plant of the same, x 5. (1) Capsule, x 8. 

 (m) Part of peristome, (n) Part of annulus. (o) Comal leaf, (p) Basal cells, 

 (q) Middle cells. 



PLATE XX. 



(a) Timmia megapolitana Hedw., x 3. (b) Tip of fruiting branch, showing 

 young capsule with calyptra. (c) Filiform stoloniferous branch, (d) Calyptra 

 on a younger capsule, (e) Capsule, with peristome, (f) Stem leaf, (g) 

 Basal cells, (h) Apex of leaf, (i) Synoecious flower, showing base of seta, 

 antheridia, paraphyses, and undeveloped archegonia, with the perigonial 

 leaves inclosing them, (j) Latticed inner peristome, and two of the outer 

 peristome, (k) Spores, diameter 18 mmm., x 500. 



