147 MOLLUSCA OF THE GULF OF MEXICO II5 



Distribution. — Massachusetts Bay to Florida. Recent. Type of 

 subgenus Lyrodus Gould. Gulf coast. — Cedar Keys, Fla. 



Genus XYLOTRYA Leach 

 fimbriata Jeffreys, Syn. Brit. Teredo, Ann. and Mag. Nat. Hist. 

 3d ser., 6, p. 126, i860 ; Tryon, Proc. A. N. S. Phila., 13, 

 p. 478, '62 ; Gould, Inv. Mass., Binney's ed., p. 34, f. 

 361, 1870 ; Ball, Bull. 37, U. S. N. M., p. 74, pi. 59, f. i, 

 '89; List Cameron Sh., 1906 (MS.); Johnson, Occ. Pa. 

 Bost. Soc. N. H., 7, p. 82, 1915. 

 palmidata of Forbes and Hanley, Perkins, and a number of 

 other authors ; but not palmu/ata Lamarck, An. s. Vert., 

 2d ed., 6, p. 38 ; nor of Philippi. 

 Distribution. — Rhode Island to the Gulf of Mexico, burrowing 

 in wharves and timbers. Gulf coast. — Errol Isl., West 

 Fla. ; Chandeleurs, La. ; Texas. 

 fimbriata variety subaequalis Dall, Proc. U.S. N. M., 6, p. 337, 

 1883. 

 Distribution. — Cedar Keys, Fla. 

 bipennata (Turton) Jeffreys, Ann. and Mag. Nat. Hist., 3d ser., 

 6, p. 126, i860 ; Dall, Bull. 37, U. S. N. M., p. 74, 1889. 

 Distribution.— North Atlantic to St. Vincent, W. I. Gulf 

 coast. — West Florida. 



