232 MEMOIES OF THE QUEENSLAND MUSEUM. 



The general appearance of the frond, the method of attachment of the 

 pinnse and their general shape, particularly the truncate tips, are characteristic of 

 Nilssonia. In the slight narrowing of the pinna near the base the specimen 

 diverges from the typical Nilssonia. An apparent slight divergence of the veins 

 is mentioned in the description. The venation only shows on portions of a few 

 pinna3 and it is quite possible that the slight apparent divergence is accidental. 



Neither of these two differences from the typical Nilssonia is sufficiently 

 marked to Avarrant a separation without further material. 



As far as can be ascertained the only species of Nilssonia which this one 

 approaches is N. schaumhurgensis (Dunker)- which occurs in the Wealden of 

 North Germany and England. There is a general resemblance between the two 

 species, but N. mucronaium is larger than N. schaum'burgensis, and this in 

 addition to the points noted above seems sufficient to justify its separation as a 

 distinct species. 



LOCALITY AND STRATIGRAPHICAL HORIZON. 



This specimen was collected by Mr. F. L. Berney and presented to the 

 Queensland Museum. It comes from Wyangarie Station, on O'Connell Creek, 

 situated to the south of Richmond, which is on the Townsville-Cloneurry Railway, 

 It occurs in rocks belonging to the Winton Series. Mr. B. Dunstan, the Chief 

 Government Geologist of Queensland, in his recent revision of the Geological 

 Record for Queensland, indicates a series of freshwater beds in Central, and 

 Western Queensland, on the western side of the main divide, which he calls the 

 Winton Series. This series contains carbonaceous beds and coal-seams and 

 overJies the marine Lower Cretaceous Series known as the Rolling Downs 

 Formation. In a similar stratigraphieal position in the coastal area of Queens- 

 land are the Burrum Coal INIeasures in the ]\]aryborough district. The Burrum 

 Coal Measures contain workable coal-seams. 



Up to the present few fossil plants have been obtained from the Winton 

 Series, but an abundant flora is known in the Burrum Coal ]\Ieasures. The 

 Burrum flora,, in its general aspect, is distinctly different from that of the 

 so-called Trias-Jura System, including the Ipswich and AValloon Coal Measures. 



It is not likely that such a specimen as the one described here is an 

 isolated one and its presence leads to the hope that further collecting from the 

 same area may bring forth more examples. 



It is of interest to note that no specimens resembling Nilssonia 

 mucronaium are present among the flora of the Burrum Coal Measures as at 

 present known. 



EXPLANATION OF PLATE XX [V. 



Fig. 1. — NiUsonia mucronatum (De Vis). Wyangarie Station, Q. ; natural size. 



Fig. 2. — Nilssonia mucronatum (De Vis). Portion of a frond sho'W'ing attachment of 



pinnae to rachis. (x2.) 

 Fig. 3 a and 6. — Nilssonia m,ucronatum (De Vis). Two fragments of pinnae showing 



venation. (x2.) 



' Palseontographica, Band xix., Taf. xxxiii. 



