126 Mr. Jeffreys' Synopsis of British Species of Teredo. 



13. T. fimbriata f, n. s. . 

 T. palmulata, Forbes and Hanley, but not of Lamarck or Philippi. 

 Habitat : in teak-wood, Leith (Jeffreys). 

 The minute description of this species which is given in the 

 1 History of the British Mollusca ' makes it unnecessary to add 

 anything to it ; but I may remark that the front margin of the 

 pallet is fringed, as in T. pennatifera and bipennata, and that the 

 valves are more nearly allied to T. fusticulus than to the T. pal- 

 mulata of Philippi. 



14. T. pennatifera f, Blainville. 



Habitat : in floating wood thrown up on the coast of Guernsey 

 (Lukis); Beachy Head (Dennis). In France it has occurred 

 under similar circumstances at Cherbourg. 



15. T. bipennataf, Turton. 

 T. carinata (partim), Gray. 



Habitat : with the last. 



This species requires further investigation, because of the 

 similarity of its valves to those of T. malleolus, and of its pallets 

 to those of T. pennatifera. The former appear, however, to pre- 

 sent a difference in being more arched and solid than in T. mal- 

 leolus, with the anterior auricle larger and having more stride, as 

 well as in the posterior auricle being usually smaller ; and the 

 latter in having a much shorter and thicker stalk than in 7*. 

 pennatifera, which is not annular or tracheiform as in that spe- 

 cies, as well as in the lateral filaments being shorter and less 

 slender. 



Observation. — The species distinguished by a f may not be 

 strictly indigenous, but occasionally or accidentally visiting these 

 coasts. I have given only the localities which occurred to myself 

 or were communicated to me by scientific friends, having in 

 every instance examined and verified the species. 



Exotic Species, 

 A. 



16. T. truncata, Quatrefages. 



17. T. Senegalensis, Blainville. 

 Taret du Senegal, xidanson. 



18. T. elongata, Quatrefages. 



T. Petitii, Recluz. 



T. Senegalensis, Fischer. 



