Verrill and Bush — 3fcirine Mollusca of the Bermudas. 519 



Primary radial costje about twelve, most of them double, those near 

 the anterior and posterior margins less distinct ; in the deep grooves 

 between them there are usually three to five delicate costuloe, finely 

 cancellated by the smaller lines of growth. Rather strong, elevated 

 lirse cover the entire surface, crossing both the costae and grooves ; 

 on the former some of them rise up into scale-like prominences 

 and on the posterior ones often become subspinulose. In the right 

 valve there are two very unequal cardinal teeth, the centi'al one 

 prominent and slightly bilobed ; the anterior much smaller, promi- 

 nent, with a little pit between. The lateral teeth are well-developed, 

 the anterior one much the longei*. The ligament is strong, with a 

 deep groove. 



Length of the single valve, 7"" ; height, S^-^ ; thickness, S"^". 



liucina reticulata Poli {non Lam.). 



Lucina pecten Philippi, Moll. Sicily, i, p. 31, tab. iii, f. 14, 1836 (uon Lamarck). 

 Lucina reticulata Philippi, Conchylien, iii, p. 104, tab. ii, f. 6, 1850. 



The comparatively few specimens from Bermuda agree with 

 Philippi's figure, but it is doubtful if they are but an elongated 

 form of X. 2^&Gten Lam., being less orbicular with finer sculpture than 

 that species, and being intermediate between pecten, which is 

 rounder with coarser sculpture, and />ec^^?^a^a Ad. [obliqua Reeve), 

 which has more prominent beaks and much finer sculpture. 



Family CARDIID-ffi. 



Cardium (Papyridea) Petitianum d'Orb., 1846. 



Cardium Petitianum d'Orbigny, L'lle de Cuba, ii, p. 309, Atlas, pi. xxvii, 



figs. 50-53, 1853. Dall, Bull. U. S. Nat. Mus., No, 37, p. 54, 1889. 

 Two separate immature valves were dredged. 



Family PETRICOLIDiE. 



Petricola (Naranaio) lapicida (Gmelin). 



Plate LXIII. Figs. 14 and 15. 



Petricola lapicida Hanley, Eeceiit Shells, p. 53, 1843. Dall, Bull. XJ. S. Nat. 

 Mus., No. 37, p. 58, 1889. 



Examples of this rare form, taken from, borings in dead corals, 

 forwarded to Dr. Dall, were identified as this species. 



