522 Verrill and Bush — Marine Mollusca of the Bermudas. 



Family GASTBOCH^NID^. 

 Gastrochaena (Spengleria) rostrata Spengler. 



Gastrochcena mytiloides^ Lamarck, in Hanley, Recent Shells, p. 10, pi. 9, fig. 



37, 1843. 

 Gastrochcena Chemnitziana d'Orbigny, L'lle de Cuba, ii, p. 229, pi. xxv, figs. 



29-30, 1853. 

 Rocellaria (Spengleria) rostrata Spengler, in Tryon, Structural and Sj'stematic 



Conehology, iii, p. 120, pi. 104, f. 47, 1884. 

 Gastrochcena {Spengleria) rostrata Dall, Bull. U. S. Nat. Mus., No. 37, p. 72, 



1889. 



Common in borings in both dead and living coral. 



Family TEREDINID^. 



Teredo Thomsoni Tryon. 



Teredo Thomsoni Tryon, Proc. Acad. Nat. Sci., Philadelphia, p. 280, pi. 3, 

 figs. 3-5, 1863. Gould, Invert, of Mass., p. 31, f. 358, 1870. Dall, Bull. 

 U. S. Nat. Mus., No. 37, p, 74, 1889. 



This large species was found in great abundance in a large log 

 cast ashore at Bailey Bay. 



G-ASTROPODA. 

 OPISTHOBRANCHIATA ; TECTIBRANCHIATA. 



Family ACT-ffiONID^, 

 Actseon punctostriatus (C. B. Adams). 



Plate LXV. Figs. 15 and 18. 



Tonatella punctostriatxis C. B. Adams, Boston Journ. Nat. Hist., ii, p. 823, 



pi. iii, f. 9, 1840. 

 ActcBon punctostriatus Bush, these Trans., vi, p. 467, pi. xlv, f. 17, 1885. 



Dall, Blake Report, pt. ii, p. 40, 1889 ; Bull. U. S. Nat. Mus., No. 37, p. 84, 



pi. xli, f. 17, pi. Iii, f. 22, 1889. 



The half dozen specimens from Bermuda agree in the size of the 

 nucleus with examples from New England, but among those from 

 off Cape Ilatteras, "N. C, there is great variation in this character, 

 as shown in the figure. 



* d'Orbigny calls attention to the close resemblance of his shell to the mytiloi- 

 des of Lamarck. 



