516 Verrill and Bush — Marine Mollvsca of the Bermudas. 



List of Additional Species. 



BIVALVIA. 



Family OSTREIDiE. 



Alectiyonia limacella (Lam.). 



Alectryonia limacella Chenu, Manuel Conch., ii, p. 197, f. 1005, 1862. 



Several specimens adhering firmly to gorgonians were seen in the 

 excellent collection of Miss A. Peniston. 



Family PECTINIDiE. 



Chlauiys exasperatus (Sowerby). 



Pecten exasperatus Hanley, Eecent Shells, p. 273, 1856. 



Pecten fuscojjurpureus Conrad, Journ. Acad. Nat. Sci., Philadelphia, new 



series, i, pp. 209, 280, pi. 29, f . 10, 1849. 

 Pecten exasperatus Dall, Bull. U. S. Nat. Mus., No. 37, p. 34, 1889. 



The young of a form agreeing with the typical B. fuscojjurpicreus 

 of Conrad are not uncommon. Dr. Dall considers it one of the 

 variations which grade into the typical exasperatus of Sowerby. 



Lyropecten nodosus (Linne). 



Pecten nodosus Hanley, Recent Shells, p. 279, 1856. Chenu, Manuel Conch., 



ii, p. 183, f. 922, 1862. Dall, Bull. U. S. Nat. Mus., No. 37, p. 34, 1889. 

 Lyropecten nodosus Verrill, these Transactions, p. 63, 1897. 



One broken specimen of this species was dredged in 1898. Several 

 fine examples were seen in Miss Peniston's local collection. 



Family MYTILIDiE. 



Modiola (Botulina) opifex Say. 



Plate LVHI. Fig. 3. 



Modiola opifex Say, Journ. Acad. Nat. Sci., Philadelphia, iv, p. 369, pi. xix, 

 f. 2, May, 1825. Philippi, Conchylien, iii, p. 21, tab. ii, f. 7, 1851. Dall, 

 Bull. U. S. Nat. Mus., No. 37, p. 38, 1889. 



Not uncommon. Our specimens are young. 



