﻿Evans : Hepaticae of Southern Patagonia 431 



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radicante posita "; in the species described above, on the contrary, 

 the sac is clearly terminal on ascending stems or elongated branches, 

 showing that the plant is a Tylimanthus. The sac moreover has 

 the same structure as that ascribed to this genus — its wall is 

 closely adherent to the calyptra and it bears a cluster of unfertil- 

 ized archegonia at its mouth. At my request Professor Nathorst 

 nas kindly sent me some of the original specimens of Gymnantke 

 Anderssonii as determined by Angstrom. So far as can be decided 

 from sterile plants, these belong to the same species as Dr. Hatch - 

 specimens, although in some of them the leaves are a little 

 more toothed. 



V\le University. 



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Explanation of folates. 



Plate 345. BUpharostoma pilosujfi Evans. I. Plants, natural size. 2. Part of 

 *tem, antical view (X32). 3. Leaf (X32). 4. Leaf subtending branch (X3?)« 

 •5- Underleaf (X 32). 6. Cells from middle of leaf (X 290). Blepharostoma quad- 

 npartitum (Hook.) Trevis. 7. Leaf (X 32). 8. Perichaetial bract (X3 2 )- 



Plate 346. Jiingermannia Ha tc/ieri Evans. I. Plant, natural size. 2. Part of 



gemmiparous stem, antical view (X 16). 3, 4. Leaves (X16). 5, 6. Underleaves 



(X28). 7. Cells from middle of leaf (X 2 55). Jungermannia propagulifera 



ousche. 8. Plants, natural size. 9. Part of stem with $ and 9 inflorescence, an- 



t'cal view (X 16). 10. Part of stem with perianth, antical view (X 16). II. Leaf 



|X 16). I2 Cells from middle of leaf (X255). 13, 14. Innermost perichaetial 



^cts, 13 witb connate bracteole (X 16). 15. Bract of next outer row (X 16). 16, 



7- Pengonal bracts (X 16) ; 13-17 from one inflorescence. 18. Innermost perichae- 



racts with connate bracteole between them, from another inflorescence (X l6 )- 



Plate 347. Plagiochila ansata Hook. f. & Tayl. I. Plants, natural size. 



2. 



art of stem with perianth, lateral view (X J 5)- 3- Part of sterile stem ' lateral 

 *J* (Xi5)- 4. Cells from middle of leaf (X*9°)- 5i 6 > 7- Kracts > in re g ular 

 / er from P^ianth (X 15). 8. Transverse section of perianth (X l8 )- 9- Teeth 



m mout h of perianth (X 290). 

 2 Plat E 348. Tylimanthus Anderssonii (Angstr. ) Evans. I. Plants, natural size. 



' ' tenle stem, postical view (X 12). 3. Female stem with two young sacs (X * 2 ). 

 C I! emaIe stem with mature sac (X 12). 5. Male stem, antical view (X 12). 6. 



e * from middle of leaf (X 220). 7, 8, 9. Perichaetial bracts (X 12). 10. Peri- 



* 0n, al bract (X 14). 



