(14 JOrKNAT. OF THP] NEAV JERSEY 



a narrow, deep, rounded notch ; the tube in wliich the animal; 

 lives is not divided into chambers ; pallets with the blade obo- 

 vate^ very slightly or not at all notched, and with the stalk onLy 

 half as long. Shell L, 6-12; W. 6-12: Pallet L, 4-(>; W. 2-3, 

 Stalk 2. — ^Mass. and south. Common in fi-oating drift wood. 



3. Teredo dilatata, Stim. Similar in shell and pallets to the 

 last species ; but the posterior auricle is not separated by a deep 

 notch, and the end of the tube in which the animal lives is di- 

 vided into many chambers, — L. 6; H. 5^. Pallet K o; W. 2 J. 

 Stalk 1. Mass. and south Not common. 



4. Teredo TJiomsoniiy Try. Length of valves \ less than height \ 

 anterior and posterior auricles but little different in size, the pos- 

 terior one does not extend as low as the anterior one ; pallets 

 with oval blades, having, on one side, a smooth, horseshoe- 

 shiiped rim enclosing a depressed, striated area ; stalk very short ;• 

 tube not chambered. Shell L. 6-9 ; H. 8-12. Pallet L. 5-8 ; 

 W. 2-3. Stalk 1.— Mass. 



5. Teredo normi'ica, Speng. Valves solid, higher than long, the 

 two auricles ending below at about the same level, and with their 

 dorsal margins concave ; pallets spade-shaped, square at tip, and 

 with the stalk as long as the blade; tube chambered at entrance. 

 Shell L. 14; H. 15; W. 17. Pallet L. 21 ; Vv. 6.— New England. 

 Rare. 



6. Teredo {Lyrudi.^j chlorotlca^ Gould. Valves rhomboidal a 

 very little higher than long; umbones enveloped in the callus 

 of the triangular area, which is large, ascendent, obtuse at point, 

 witli about 40 divergent square ribs with the interspaces finely 

 barred ; pallets paddle-shaped, the stalk flexuous and very deli- 

 cate, the blade half as long, lyre-shaped, the extreme f covered 

 with a dark crust which has a projecting horn at each angle. 

 The minute size and globular form of the shell and the very 

 peculiar pallets make it remarkable and has caused the forma- 

 tion of the subgenus Ljn'odes. Shell about 3 in all directions. 

 Pallet L. 5; W. J; stalk 2 J. 



2. Xylotrya, Leach. 



Siphonal pallets long and feather form, the blade being made 

 up of articulated pieces arranged like the parts of a feather. 



1. Xylotrya Jimbriata, Jef. Valves similar to Teredo navalis, 

 but the pallets are oar-shaped with the blade marked feather-like 



