18 



P. 7nnltilineatian. The description of P. yerongense indicates 18 to 

 20 veins per pinna and this is the approximate number at the base 

 in P. tnultilineatuvi. 



The species Pterophyllum quadrifilorum, Shirley, is doubtfully 

 included as a synonym of P. viultilineatum. The originals of all 

 the figures of P. quadrifilorum appear to have been lost. The only 

 feature which distinguishes lietween these two species is the venation, 

 and as no further specimens are available with the venation attri- 

 buted to P. quadrifilorum it is probably better to regard this as a 

 synonym of P. multilineatum. 



Strictly speaking the name P. yerongense should be adopted 

 for this species as it comes first of the two original descriptions, 

 which are on the same page. It seems justifiable, however, in 

 this case to adopt the name P. mnltilineatum, as both description 

 and figure were more complete and also since specimens have been 

 more widely recognised under this name. 



Fragmentary specimens from Denmark Hill, Ipswich, have been 

 collected with longer pinnse (up to 5-5 cm.) but probably these 

 belong to larger fronds of the same species. 



Similar species are of widespread occurrence, e.g., P. sp., cf. 

 P. Tietzii, Schenk, from the Burghersdorp Beds of South Africa,^'' 

 P. Tietzii from the Rhaetic of Persia and Tonkin and others. 



This species has been recorded by Zeiller from the Rha?tic 

 of Tonkin.3i 



Localities : — [Ipstcich Series) : Denmark Hill, Ipswich (F 161). 

 Petrie's Quarry (F 160) ; Queens port (F 567) ; Yeronga (F 157). 



Figured specimen: The original of Plate 6, fig. 1, is specimen 

 F 161 in the collection of the Queensland Geological Survey. 



Pterophyllum Nathorsti (Seward). 

 (Plate 5, figs. 4, 5.) 

 1900. Dioonites Nathorsti, Seward, Jurassic Flora, 1, p. 230. 

 1011. Pterophyllum Nathorsti, Seward, Proc. Roy. Soc. Edinb.. 47, 

 p. 694. 

 Some fragmentary specimens are referred to this species. 

 They have long narrow pinnae which are inclined to the rachis at 

 an angle of about 60 ; the pinnae are acutely pointed, have a 

 width of 1 to 3 mm., and a length of 2-5 cm. They are attached by 

 the whole base. The rachis has a width of from 1-5 to 2 mm. 

 Each pinna is traversed by a small number (3 to 5) of simple, 

 parallel veins. 



" Seward (08), p. 103. " Zeiller (03), i>. 301. 



