498 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Cuspidaria ornatissima d’Orbigny. 
Sphena ornatissima d'Orbigny, Moll. Cubana, II, p. 286, pi. xxvii, figs. 13-16, 1845. 
Nexra costata Bush, Trans. Conn. Acad., vi, pt. n, p. 472, pl.xLV, fig. 21, 1885. 
Mayaguez Harbor, Porto Rico, at station 6062, in 30 fathoms; also at St. Thomas, Guadeloupe, 
Martinique, and Cuba (d’Orbigny), and northward to Cape Hatteras, North Carolina. 
Family VERT1C0RDI1D£. 
Genus VERTICORDIA Wood, 1844. 
Subgenus Tkigonulina d’Orbigny, 1845. 
Shell compressed laterally, small, very pearly, suborbicular, with a few very strong arcuate radial 
ribs, granular surface, and deep lunule; ossiculum long and narrow. 
Verticordia ornata d’Orbigny. 
Trigonulina ornata d’Orbigny, Moll. Cubana, n, p. 292, pi. xxvii, figs. 30-33, 1845. 
Verticordia cselata Verrill, Trans. Conn. Acad., v, p.566, 1884; vi, pl.xxx, figs. 9, 9a. 
Mayaguez Harbor, Porto Rico, at station 6062, in 30 fathoms, sand ; also at Barbados, Cuba, Florida, 
and north to Marthas Vineyard, Massachusetts, and in Japan, California, and the Mediterranean. 
Superfamily AN ATTN ACE A. 
Family LY0NSIID4E. 
Genus LYONSIA Turton, 1822. 
Shell thin, pearly, longer than high, inequivalve, inequilateral, truncate behind; hinge edentulous, 
with the ligament in a sulcus, and a large lithodesma; pallial sinus obscure, angular. 
Subgenus Entodesma Philippi, 1845. 
Shell with a strong periostracum, gaping behind, the anterior end short, the surface without 
notable radial sculpture. 
Section ENTODESMA s. s. 
Shell large, coarse, opaque, irregular, nestling, subquadrate, with a very large lithodesma. Type, 
E. chilense Philippi. 
Section PHILIPPINA Dali, 1901. 
Shell small, thin, polished, very inequilateral, anterior end attenuated, very short; gaping below, 
compressed behind, commensal with sponges or compound ascidians. Type, L. beana d’Orbigny. 
This is a small but peculiar group which often shows color painting, which the other sections of 
Lyonsia do not. L. picta Gray, L. diaphana Carpenter, and L. ivflata Conrad are also probably 
referable to it. 
Lyonsia beana d’Orbigny. 
Lyonsia beana d’Orbigny, Moll. Cubana, n, p. 225, pi. xxv, figs. 26-28, 1845. 
Vieques; also Cuba and other islands of the West Indies, and north to North Carolina. 
It is probable that d’Orbigny intended to name this species after M. Beau, who collected it, but 
the name is spelled in his text as above and also on the legend to his plate. 
