TWO UNDESCRIBED PELECYPODA from the LOWER 



CRETACEOUS of QUEENSLAND in the COLLECTION 



OF THE AUSTRALIAN MUSEUM. 



By R. Etheridge, Junr., Curator. 



(Plates xxxiv. — xxxv., and Fig. 21). 



L Further Evidence of Teredo. 



The presence of Terecfo-like tubes in our Lower Cretaceous Series, 

 has lieen known for some time, but until the specimens about to 

 be described came under notice, the existence of this boring 

 Mollusc was not thought to be as plentiful as now proves to be 

 the case. 



The first record of Teredo in Australian Mesozoic beds is due 

 to the late Mr. Charles Moore, who described a shell, forming one 

 of a colony, as T. australis,^ from the Oolite of West Australia. 

 This had been previously recorded by the late Rev. W. B. Clarke 

 as a Pholas." Some years subsequent to Moore's description, I 

 recorded the presence of Teredo in limited quantity in both our 

 Upper and Lower Cretaceous — impressions of tubes in the grit of 

 the Croydon Gold Held,' and shelly tubes in limestone,^ brought 

 under my notice by the late Rev. J. E. T. Woods, with, in one 

 instance, a portion of the valves remaining. Teredo-hon'd wood 

 was also collected from the Rolling Downs Formation by Mr. G. 

 Sweet,'* at Hughenden and the Walsh River. 



Amongst many other interesting Lower Cretaceous fossils 

 collected and presented to the Trustees by Mr. W. H. Blomfield 

 are fourteen blocks of variable size, either representing or forming 

 parts of tree-trunks, riddled with the shelly tubes of Teredo, many 

 of large size. 



Some of the blocks represent portions of trunks preserved in 

 the round, others divided longitudinally, and some in pieces only. 

 The following measurements of the two former conditions were 



noted : Length (direction Breadth (i-ight angles Circumference 



of growth). to direction of growth). or girth. 



a 



h 



c 



d 



They indicate a fairly uniform size. 



1 Moore— Quart. Journ. Geol. Soc, xxvi., 1870, pp. 230 and 253, pi. xii., f. 11. 



2 Clarke— I67d., xxiii., 1867, p. 8. 



3 Etheridge, Junr.— Geol. Pal. Queensland, etc., 1892, p. 572, pi. xliii., fig. 11. 



4 Etheridge, Junr. — Loc. cit., f. 12. 



5 Etheridge, Junr. — Loc. cit., p. 573. 



