N0.1237. SYNOPSTS OF THE LUCINACEA—DALL. 799 



tbeir reception, but for the present this seems unjustified. The East 

 American species are as follows: 



CODAKIA ORBICULARIS Linnaeus, 1758. 



From St. Augustine, Florida, southward to the Ke3^s; at Bermuda; 

 also on the west coast of Florida north to Little Sarasota Bay; Texas; 

 East Mexico; throughout the West Indies as far as Maceio, Brazil; 

 (Senegal if). In 1 foot water, among algw, Krebs. 



This is the Venus orhicularis of Linnteus, 1758; T^ tigerhia {piwt)^ 

 Linnaeus, 1766; Cytherea tigerina Lamarck, ex parte, 1818, but not 

 C tigrina Lamarck, 1818; Luchia tigerina Reeve, 1850, not of Lin- 

 naeus, 1758; Lucina inisilla Gould (nepionic shell), 1862; but not 

 Lncina orhicularis Sowerby, 1837, nor Deshayes (Morea) 1836. Yenus 

 invnixtata Linnaeus, 1758, is supposed Iw Dillwyn to be based on an 

 artificiall}' polished specimen of this group. 



CODAKIA CUBANA Dall, 1901. 



Gulf of Mexico, at station 36, in 84 fathoms, U. S. Coast Survey 

 steanier Blake. 



A small, thin, and delicate species, with obsolete sculpture, as becomes 

 its rather deep-water habitat. It was erroneously identified with 

 Lucina lenticula Reeve, in the Blake Report of 1886. 



CODAKIA (JAGONIA) ORBICULATA Montagu, 1808. 



This species was first described b}^ Montagu from an adventitious 

 specimen supposed to be British. It is the Venus orhiculata Montagu, 

 1808, and Dillwj^n, 1817; Lucina squamosa Lamarck, 1818, not of 

 Lamarck, 1806; Lucina jpecten Lamarck, 1818 (not of many authors); 

 Lucina imhrieatula C. B. Adams, 18-15; Lucina occidentalis Reeve, 

 1850; Lucina ohliqua Reeve, 1860 (according to E. A. Smith), but not 

 of Defrance, 1823, or Philippi, 1860; Lucina pectinata C. B. Adams, 

 1852, not of Gmelin, 1792, or Carpenter, 1857; L. nasuta Guppy 

 (erroneously as of Conrad), 1887; but not Lucina m'hiculata Nyst, of 

 the Belgian Tertiaries. Guppy's name is probably an error for L. 

 nassula Conrad, which belongs in a totally distinct group. 



This type appears to be very variable and to extend its range from 

 Senegal and the Azores to the east coast of America and the Antilles. 

 The following forms may be discriminated: 



JAGONIA ORBICULATA var. ORBICULATA Montagu. 



Cape Lookout, North Carolina, and Bermuda, south to the West 

 Indies, the Abrolhos Islands and San Sebastian, Brazil; from low 

 water to 52 fathoms: Senegal, Azores. 



This is the common form in which the sculpture is of rather strong 

 ribs radiating from the umbones and more or less divaricate toward 



