J. Starkie Gardner — Teredo in the Eocene. 163 



" I have found living Teredo in wreckage and other timber that 

 had been drifting about for some time in the same relative position 

 as in the fossil trunks. W. H. S." 



Some of the logs at Sheppey must have been entire trunks of large 

 trees, and they seem to have become water-logged and sunk before 

 the Teredo had penetrated through even to the core, but in the 

 vicinity of London, where wood in a calcined state is found in smaller 

 pieces, it is invariably completely riddled. I only recollect observ- 

 ing it elsewhere at Harwich and Heme Bay, but there is no doubt 

 that most of the wood, except small twigs, is universally bored by 

 Teredo in this formation. 



Lower Bagshot Formation. — I cannot trace the occurrence of any 

 bored wood in these beds at Corfe, Studland, Alum Bay, or elsewhere 

 in Dorset and the adjoining borders of Hampshire, neither does Mr. 

 Keeping recollect any at Whitecliff Bay. I have found it, however, 

 in company with Mr. Hudleston, in the cutting near Walton. 



Middle Bagshot Formation. — The wood throughout this great 

 formation is invariably completely riddled, except in the lowest beds 

 overlying the Lower Bagshot in the neighbourhood of Poole Har- 

 bour and inland to the N.W. of Bournemouth. There is frequently 

 so little of the substance of the wood left that it appears as a mere 

 dark stain in the sand separating the casts of the tubes. The logs in 

 the Bournemouth beds are never large, seldom exceeding three or four 

 feet, and are riddled quite through and through. In a higher part of 

 the series, at Hengistbury, the logs are larger, sometimes five feet long 

 and two or more feet in width, and the bores are relatively gigantic, 

 being upwards of an inch in diameter, sparsely scattered, and 

 obviously the work of a different animal. Wood from the true 

 Bracklesham beds, wherever met with, is invariably bored by 

 Teredo. 



Upper Bagslwt Formation. — Wood is always more or less bored in 

 these beds, though less extensively so perhaps in the Barton series 

 than in the Bracklesham beds just noticed, for solid pieces occur in 

 the former, but not in the latter. I am indebted to Mr. Keeping for 

 corroboi'ating this observation, and extending it to the same series in 

 Whitecliff Bay, where I had not noticed any wood. 



Lower Headon Beds. — Neither Mr. Keeping nor myself have 

 noticed bored wood, at Hordle and in the Isle of Wight, in this 

 formation. 



Middle Headon Beds. — Mr. Keeping tells me that wood is in- 

 variably bored in the Brockenhurst beds, but I have no notes regard- 

 ing wood in the beds at Colwell and Totland Bays. 



Upper LLeadon Beds. — No bored wood occurs in these. 



Bembridge Series. — Mr. Keeping and myself are confident that no 

 Teredo-bored wood occurs in any part of this series, unless in the 

 brackish series near Whitecliff Bay, where none however has yet 

 been observed. Mr. E. A'Court Smith writes, " I have never noticed 

 Teredo-boring in any of the wood here, though some of the wood is 

 apparently perforated by a species of beetle (or White-Ant ?). So 

 great is the perforation in some cases that the wood drops to 



