XXV] COMPARISONS 227 



Glcicheuia, seen also in J\I. sarviejitosa, and in Matonidium Wz'esjieri (Seward, 

 I.e., Fig. 265, A), and a coarse and irregular reticulum seen in variable degree 

 in M. pectinata, and well represented in Laccopteris. The simple hairs of 

 Matouia correspond to those of Platyzoma. The sorus is plainly Gleicheni- 

 oid, but with modifications of the sporangia the most striking of which are 

 already exhibited in the Gleicheniaceous Platyzoma. The distinctions be- 

 tween the two families are thus relatively slight: and a common parentage 

 appears to be the natural explanation of the similarity that exists between 

 them : but the divergence must have dated not later than early Mesozoic time. 

 Seward ascribes the origin of the generic type of Matouia to the Northern 

 Hemisphere, in the Triassic or early in the Jurassic Period. It reached its 

 maximum development in the Mesozoic Era, and became restricted geo- 

 graphically towards the close of the Cretaceous Period. At the present day 

 it survives only in the Malayan region. 



BIBLIOGRAPHY FOR CHAPTER XXV 



493. Seward. Matonia pectijiata. Phil. Trans, cxci (Series B), p. 171. 1S99. 



494. BowKR. Studies IV. Phil. Trans, cxcii, p. 44. 1899. 



495. Engler & Prantl. Natiirl. Pflanzenfam. i, 4, p. 343. 1902. 



496. Tansley & LULHAM. MatoTiia pectmata. Ann. of Bot. xix, p. 475. 1905. 



497. Tansley. FiUcinean Vase. Syst. New Phyt. Reprint. Cambridge. 1908. 



498. COPELAND. Philipp. Journ. Sci. 3 (1908) Bot, p. 342, Tab. 2. 



499. COMPTON. Matonia sarmetitosa. New. Phyt. viii, p. 299. 1909. 



500. Seward. Fossil Plants. Vol. ii, p. 155. 19 10. 



501. Campbell. Mosses and Ferns. 3rd edn, p. 371. 1918. 



502. Seward. Hooker Lecture, 1922. Linn. Journ. xlvi, p. 219. 



