TRIBE TUBICOLA. 3 



FISTULANA. 



With a ticbular teataceous sheath, tumid, and closed posteriorhj 

 attenuated at the anterior end, open at the summit, and contain- 

 ing an unattached bivalve shell ; valves of the shell equal, and 

 gaphig when shut. 



F. Clava. Lam. \.—Bl. t. 81./. :i.— Reeve, t. 19. Tube 

 straight and slender, club-shaped; the valves of the shell white and 

 elongated, their extremities somewhat arched, 3| • — Indian Ocean.^ 



F. Gregata. Lain. 3. — Teredo Clava. Gen. 3478. — D. p. 

 1090. — W. t. 3S. f. 4. Tubes club-shaped, flexuous, grouped, 

 brownish ; valves narrow and arcuated ; with two other unguiculated 

 and serrated appendages. 2|. — Coromandel. 



F. Lagenula. Lam. a. — E.t.\&7.f. 23. Small, laterally- 

 affixed ; tube flask-shaped, articulated by transverse segments. i\. 

 Extremely rare. 



SEPTARIA. 



With a very long testaceous tube, gradually attenuated an- 

 teriorly, and appearing as if divided internally by vaulted un- 

 fnished partitions ; anterior end of the tube terminated by two 

 other slender tubes, which are not divided. 



S.Arenaria. Lam. — SerptjlaPolythalamia. Xm. 1269. — 

 Teredo Gigantea. D. p. 1087.— TF. t. 38 /. \.—3Iart.f. 6, 

 1 1 . Tube taper, white, subcylindrical, nearly straight, thick, 

 diaphanous, wrinkled transversely ; structure radiated : 2 internal 

 tubes at the summit; inside yellowish . . 30.. 1^. — Indian Ocean. 



TEREDO. 



Tube testaceous, cylindrical, and tortuous, pervious at both ex- 

 tremities, and covering the animal. — Shell bivalve, placed exter- 

 nally, and outside the tube. 



T. Navalis.* Lin. 1267.— D. p. 1089.— iam. \.—E. t. 167. 

 /. 1 to b.— Turt.Biv.t. 12./. 1, 2,3.— Sow. G.— Reeve, t. 21. 

 — W. t. 38. f. 2. Subcylindrical, smooth, whitish, rather flexuous 

 and slightly tapering, semiconcamerated near the smaller end : the 

 valves ear-shaped, one of them with a curved denticle on the margin 

 above the teeth : pallets spoon-shaped, convex without, concave 

 within, terminating at one end in a linear elongation, and at the 

 other with a thick callus. — Europe.'^ 



^ For Lamarck's F. Corniformis see Teredo. 



* The Navalis of continental authors appears to differ. See Phi' 

 lippi.p.2. t. ]./. d.—Poli. 3. t. 57. /. 4, 5, 6.— " Palmules 2. 

 simple and semilunate." 



