DADOXYLON. 195 



Carruthers 1 mentioned petrified wood from Jack's Creek, Queens- 

 land, but did not give any description. His name Araucarioxylon 

 Nicoli is a nomen nudum. Jack & Etheridge 2 also pointed out the 

 common occurrence of fossil wood on certain horizons in the Bowen 

 Series. 



51,479. Text-fig. 40. Co-type. 



Trans. Sect. A large and good section, showing several rings of 

 growth, of which a part is reproduced from a microphotograph 

 in Text-fig. 40, enlarged 25 times. This figure shows the small 

 size of the tracheides, and the numerous medullary rays ; also 

 the gradual transition from the larger elements of the ' spring 

 wood ' to the denser and smaller ' autumn ' tracheides. 



Australia. Nicol Coll. 



51,434. Co-type. Trans. Sect. A rather smaller section than 

 the previous specimen, but identical in every respect. The rings 

 of growth are clearly seen. They are sometimes irregular, as 

 Nicol noticed in his description of similar sections ; false rings 

 of varying outline occur, which are due to bad preservation. 



Newcastle, New South Wales. Nicol Coll. 



51,616. Text-fig. 42. Co-type. 



Had. Long. Sect. A well-preserved section, a small portion of 

 which is figured enlarged 35 times in Text-fig. 42. It shows the 

 numerous medullary rays and the pitted tracheides. 



Australia. Nicol Coll. 



51,476. Co-type. Had. Long. Sect. A section similar to the 

 last, but not quite so thin. The large number of the medullary 

 rays and the short tracheides are well seen. The bordered pits, 

 often only uni- or biseriate, can here and there be distinguished. 



Bottom of the cliff, Newcastle, New South Wales. Nicol Coll. 



51,503. Text-fig. 43. Co-type. 



Tang. Long. Sect. A small portion of this section is reproduced 

 from a microphotograph enlarged 35 times in Text-fig. 43. The 

 numerous medullary ray cells, only one cell thick, are seen. The 

 absence of bordered pits on the tangential walls of the tracheides 

 is noticeable. 



Australia. Nicol Coll. 



' Carruthers (SO), p. 32S. 2 j ac t & Etheridge (92), p. 198. 



