Perkins.] 140 [November 3, 



siphons united into a tube, which is large, long, and capable of great 

 extension, black at the end, the rest yellowish Avhite. 



MEASUREMENTS. 



Length of shell 50 mill. Breadth 20 mill, 



siphon tube 57 " (contracted). 



" " 170 " (extended), 

 foot 11 " " 7 mill. 



palpi 14 " 



gills 54 " 



Martesia Leach, 1847. 



Martesia Ctmeiformis Tryon, Am. Journ. Conch., Vol. in, 

 No. 3, p. 10, App. Pholas cuneifonnis Say, Am. Conch., p. 108, 

 1822; De Kay, Moll. N. Y., p. 248. Pholas rudis et P. Edwardsii 

 Gray, Syn. Brit. Mus. (teste Tryon). 



I found one specimen of this species in a pile of shells on the 

 beach. I have not heard of any others being found here. It is not 

 uncommon on the coast of Florida. I have seen it from there in 

 cavities which it had excavated in fragments of lanre shells. 



teredim:. 



Teredo Linn., 1758. 



Teredo navalis Linn., Syst. Nat., 1267; Lam., An. sans Vert., 



Vol. vi, p. 38; Cuvier, ed. Audouin, Moll., pi. cxiv, fig. 2; Gould, 

 Invert. Mass., p. 26; Chenu, Man. Conch., Vol. II, p. 10, fig. 59. 

 Teredo marina Selluis, Hist. Nat. Tered., pi ii, fig. 2, 1733 (teste 

 Tryon). 



The only locality in which I have found this species is an old half- 

 buried wreck near the entrance of the harbor. This is completely 

 filled with living shells. Animal vermiform, bluish white; mantle 

 closed except at the ends ; gills very long and narrow, reddish brown, 

 edges slightly serrate ; foot oval ; siphons very long, united except at 

 the ends, attached to the tube near the point of division ; at the ends 

 small, slender, nearly equal, white or yellowish, spotted with rufous, 

 or sometimes clear white ; ventral siphon fringed at the end with a 

 few large papillae ; dorsal tapering, not fringed; tube somewhat cor- 

 rugated; ovaries large ; ova white. 



