17 



TEREDO Amphisbcena. 

 TAB DCXVIII. 



Spec. Char. Valves ; tube very long-, ti - 



pering-, tortuose, strong-, smooth, composed ol 

 short segments with concave surfaces. 



SvN, Teredo articulata, M. C.suht. 618. T. an- 

 nularis. Rev. G. E. Smith, MSS. Serpula 

 Amphisba?na, Goldfuss,Petr.239. t. 70. f. Hi. 



1 HIS is nearly of the same diameter as Teredo jjersonata, 

 but it is much longer and more tortuose ; at the smaller 

 end it generally tapers rather rapidly, and shows but 

 little of its articulated appearance. Our description is 

 necessarily imperfect, for we have not been able to obtain 

 more than the tube, the anterior portiosj of which is 

 inflated (see fig. 1.). 



Found imbedded in flint and chalk, with rarely any 

 remains of the wood in which it had been formed. The 

 largest specimen figured is from near Rochester, and is 

 in Mr. Bowerbank's cabinet. The specimen in flint is 



