170 



shales of the lower coal measures by its wonderful profu- 

 sion, and are an indication of the fast approaching extinction 

 of the genus in Australian rocks. 



It is of additional interest in connection with this genus 

 that Brough Smith many years ago obtained a specimen of 

 Qlossopteris, stated to be 67. Browniana, from beds of nearly 

 the same horizon at Spring Hill. It is possible that the two 

 forms may be closely allied. I am not aware whether the 

 Spring Hill specimen has ever been figured or described. It 

 would be of interest if both forms could be compared closely 

 together. 



Sagenopteris salisburioides. Nou. sp. 



Frond, palmate or flabelliform, membranous, quadri- 

 lobate ; the median division is wide, and the frond is thereby 

 deeply cleft to base ; the two lateral divisions are simplo 

 incisions to nearly the middle of frond. Segments entire 

 wedge shaped ; the principal ones very much contracted at 

 base, almost pedicellate. Apices of segments truncate, with 

 margins either crenulate, undulating, or simple. Nervules 

 springing from two or three prominent nerves at peduncle, 

 and rapidly spreading dichotomously into fine branching 

 venules towards the upper margin, anastomosing frequently. 

 No approach to a central rib on any segment. 



Fronds variable in size but constant in general form. One 

 of the smaller perfect forms measures 30 millimetres in 

 breadth and 25 millimetres in length, but there are specimens 

 occurring in fragments fully twice this size. At first sight 

 the plant would seem to be a species of Salisburia, as in 

 form it closely resembles 8. lluttoni Sternb. from the Lower 

 Jurassic of Europe. 



Not uncommon in dark grey shales at Lord's Hill, New 

 Town. 



Rhacophyllum coriaceum. Nou. sp. 



I have doubtfully placed a peculiar form under the above 

 genus for the sake of reference, as it is of frequent occur- 

 rence in the Mesozoic rocks at New Town, Spring Bay, and 

 elsewhere. The fronds are generally imperfect, and they are 

 very variable within certain limits. 



Frond or pinna simple, rarely distantly lobed, linear or 

 linear lanceolate, very attenuate at the base, gradually but 

 slightly widening towards obtusely rounded apex, usually 

 forking at a very acute angle into two secondary linear 

 pinna; which preserve the same character as the principal 

 one. Mid rib marked by a shallow central groove in the 

 coriaceous and fleshy dike frond from which the acutely angled 

 nerves can be traced with difficulty. Margins of secondary 

 pinnae, sometimes obsoletely lobed, but more frequently entire ; 



