U3 

 CHAPTER XXXVIIT. 



OF THE TEREDO. GENUS XXXV, 



TEREDO. 



"Animal a Terebella, with two hemispherical calcareous valves or jaws, 

 truncated in front, angulated beneath. Shell tapering, flexuous, pene- 

 trating wood." — Linn. 



Phese shells are found lodged in wood lengthways with the 

 grain, whereas the Pholas piisilla, which also is found buried 

 in wood, bores its holes always across the grain. This shell 

 bears some affinity to several of the Serpulce, but the animal 

 differs considerably from every one. 



Linnaeus describes only one species, the navalis ; Gmelin 

 has added tw o more ; Turton has added none. Total, only 3. 



Adanson classes the only Teredo he knew along with Pholas 

 pusillcL 



Lamarck divides this genus into two : 

 FiSTVLANA. Shell tubular, club-shaped, open at the smaller 

 end, containing two valves not adhering (see Teredo 

 Clava, Favanne, pi. 5. f. N). 

 Teredo. Shell tubular, cylindrical, open at both ends ; the 

 lower furnished with two lozenge-shaped valves, and the 

 upper end with tAA o opercula (see Teredo navalis, Adans- 

 Senegal, t. 19. f. 1 . ; and Sellii Tered. t. 1 ). 



