NO. 1237. SYNOPSIS OF THE LUCTNA^EA— BALL. 809 



PHACOIDES (LUCINISCA) MURICATUS Spengler, 1798. 



Florida Kej^s and West Indies, with adjacent coast, in (5 to 12 fathoms. 

 (Pacific coast??) 



This is Tellina muricafa Spengler, 1798; T. luthrlcata Chemnitz 

 (1799?); Liicina scahra Lamarck, 181S, but not Tdlina { = Lucina) 

 iicahra of Chemnitz and Dillwyn, 1817; and Luclrka scol>in(ita Recluz, 

 1852. It is very easily recognized ])y its spinose radial sculpture pre- 

 vailing over the concentric portion, while in the preceding species the 

 reticulation is nearh" uniform and the spinosities not prominent. 



PHACOIDES (PSEUDOMILTHA) FLORIDANUS Conrad, 1833. 



West coast of Florida from Charlotte Harbor to Cedar Keys, and 

 westward to Corpus Christi, Texas. 



Surface with rather rude concentric growth stages and a pale papery 

 periostracum; the shell usually tlat and rather heav3^ It was descril)ed 

 as a Lticina and referred by Tryon (1872) to Lorlpei^. 



PHACOIDES (LUCINOMA) FILOSUS Stimpson, 1851. 



Casco Ba}', ]Maine, south to Cape Florida, in 16 to 528 fathoms. 



This is the Lucina radula Gould, 1841, but not of Montagu, 1803; 

 and the L. contravta De Kav, 1843, not of Say, 1824, It has been 

 united, erroneously, with the Phacoklex Ixyrenlh Linn^us, by several 

 authors. It is a cold-water shell, and is found in increasingly greater 

 depths as it passes southward. 



PHACOIDES (LUCINOMA) BLAKEANUS Bush, 1893. 



Massachusetts Bay to Cape Fear, North Carolina, in 18 to 464 

 fathoms. 



Very close to the preceding species, but more quadi-ate, more sparsely 

 lamellose, and with a relatively shorter anterior adductor scar, and 

 shallower sulcus for ligament and lunule. 



? PHACOIDES (LUCINOMA) BOREALIS Linnaeus, 1766. 



Iceland. European seas. Northeast America? 



This is the Venus horealis of Linna?us in 1766, but not of Gmelin, 

 1792; the Venus sjmria of Gmelin, 1792; Tellina radula Montagu, 

 1803; Lucina alha Turton, 1822, and Thiatira spuria Gray, 1847. 

 This species has been reported from the east and west coasts of Amer- 

 ica by Carpenter, Cooper, and others, but the nearest authentic record 

 is Iceland, on the authority of Steenstrup. The others are doubtless 

 due to confusion with related Init not conspicuously similar species. 



PHACOIDES (CALLUCINA) RADIANS Conrad, 1841. 



Cape Lookout, North Carolina, and south to Florida, Bermuda, and 

 Porto Rico, iu 5 to 85 fathoms, living, dead \ahes in 287 fathoms. 



