808 PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXIII. 



PHACOIDES (HERE) AURANTIUS Deshayes, 1830. 



St. Thomas, Santa Cruz, Guadeloupe, the Virg-in Ishxnds, and other 

 loeahtie.s in the Lesser Antilles, in one-fourth to 1 fathom water sandy 

 ])ottom. "^ 



This species is distinguishable from /\ m/anmmi by other charac- 

 ters than its salmon-colored margins. It is the Lue{7ia auranthi of 

 Deshayes and has also been reported from the Azores. 



PHACOIDES (HERE) SOMBRERENSIS Dall, 1886. 



Northern part of the Gulf of Mexico south to Sombrero Island 

 West Indies, in 60 to 84 fathoms. ' 



This resembles P. adansonn \n miniature.' 



PHACOIDES (PLEUROLUCINA) LEUCOCYMA Dall, 1886. 



Cape Hatteras, North Carolina, and south to Cuba, in 4H to 683 

 fathoms. 



This is inmiediately recognizable by its few broad ri})s and small 

 wiiite sii(dl, which is figured with the preceding.' 



PHACOIDES (CAVILUCINA) TRISULCATUS Conrad, 1841. 



Cape Hatteras, North Carolina, south to Cal)o Sa.i Roque Brazil 

 in 10 to 20 fathoms. 



Notable for its obliquity and its two or three strongly marked rest- 

 ing stages, from which the name is deri^•ed. The original Lucina tri- 

 mlcata Conrad, is a miocene fossil. The recent shell usually called by 

 this name is often yery similar to the fossil, but there is a larger, 

 flatter, less coarsely sculptured form in the West Indies which lias 

 much less emphatic resting stages, and, if not distinct, is at least a 

 recognizable yariety, which may be called hlatuJn^.^ It is intermediate 

 between the typical P. trisulcahis and the Pacific coast P. lamprus. 

 It yaries from white, through yellow, to orange^ color. 



PHACOIDES (LUCINISCA) NASSULA Conrad, 1846. 



Cape Hatteras, North Carolina, south to Cul)a and Avest to Mobile 

 Bay, in 7 to 200 fathoms. 



This is LuGi7ia Untea Conrad, 1S66, and Lxeha vasxuhi Conrad, 

 1846. It is not the shell intended by Guppy, under the name of 

 "w«.v«te Conrad," which is xiJagonin, but Conrad has not described 

 any Lucina nasuta. 



I 



'See Proc. U. S. Nat. Mus. XII, 1889, p. 263, pi. xiv fig 1.3 



Udem, 1889, pi. xiv, figs. 6, 7. 



•"•See RL'port on Porto Rico shells, p. 49.3, 1901, pi. vi, lig. 13. 



