THE JURASSIC FLORA OF SUTHERLAND. 655 



Zamites sp.* Brora (Lower Oolite). 



Pterophyllum Nathorsti Sew. 



Nilssonia orientalis Heer. 



Nilssonia brevis Brongn. 



Nilssonia sp. cf. Nilssonia compta (Phill.). 



Nilssonia mediana (Leek.). 



Bucklandia Milleriana, Carr.f Brora (Lower Oolite). 



Yatesia crassa Carr.f „ ,, ,, 



Yatesia Joassiana Carr.f „ ,, „ 



Otozamites sp. 



Otozamites sp.% Brora (Lower Oolite). 



Cycadean pinnse, cf. Dioonites Dunkerianus (Goepp.). 



Cycadospadix Pasinianus Zig. 



PLANTS INCERTiR SEDIS. 

 A, B, C, D (? Podozamites sp.). 



I. PTERIDOPHYTA. 



Hydropterideae (?). 



Sagenopteris, Presl. 

 The systematic position of this genus of Mesozoic plants is still uncertain. It is 

 not improbable that Nathorst and some earlier writers are correct in assigning 

 Sagenopteris to the Hydropterideae, an opinion based in the first instance on the 

 resemblance of the leaves to those of Marsilia, and subsequently supported by Nathorst's 

 discovery of bean-shaped bodies, closely resembling the sporocarps of the recent genus, 

 in association with the leaves. These bodies, which have recently been assigned by 

 Halle § to a new genus, Hydropterangium, have, however, not been found in organic 

 connection with fronds, and the reference of Sagenopteris to the HydropterideaB must, 

 therefore, be regarded as provisional and still lacking confirmation. 



Sagenopteris Phillipsi (Brongniart). (Text-fig. 1 ; PL I. figs. 1-4 ; PL VI. 

 photos. 3-5 ; PL VII. photo. 19, s.) 



Professor Lester Ward,|| who is a whole-hearted adherent to the rule of priority 

 in its strictest application, has revived the forgotten name \Pecopteris\ paucifolia 

 employed by Phillips in 1829 for this species, which is familiar to all students of 

 Mesozoic botany as Sagenopteris Phillipsi, on the ground that Brongniart's description 

 was published in 1830, a year subsequent to the date of Phillips' Geology of 

 Yorkshire. 



The genus Sagenopteris is represented by numerous specimens from Culgower, 

 occurring for the most part as single and usually imperfect leaflets. They vary in size 

 from about 11 cm. in length to 1'5 cm. (cf. PL VI. photo. 5, and PL VII. photo. 19, s), 



* Recorded by M. C. Stopes (07). t Described by Carrtjthers (70). % Recorded by M. C. Stopes. 



§ Halle (10), p. 11. For other references, see Seward (10), p. 477. || Ward (05), p. 85 (footnote). 



