250 MOLLUSCA. 
MANGELIA CITHARA (Gould). 
Testa parva, rhomboideo-fusiformis, cinerea, costis acutis longitudina- 
libus sepltem instructa, interstitiis concavis, subtihter transversim 
slriatis: spira turrita, anfractibus septem bené discretis, ultimo ovato- 
triangulart trientes duos longitudinis testa adequante: apertura an- 
gusta ; labro lato, varicoso, postice rectangular vix sinuato ; columella 
concinne TUGOSA. 
Mangela cithara, Goutp; Proceed. Boston Soc. Nat. Hist., 11. 140. 
May 1849. Expedition Shells, 63. 
SHELL minute, rhomboid-fusiform, ashy-white, with about seven 
elevated, acute, longitudinal folds; the intervening spaces concave and 
minutely striated spirally. Spire turreted, whorls seven, decidedly 
separated by an impressed suture, apex acute; last whorl two-thirds 
the length of the shell, somewhat triangular-ovate. Aperture half the 
length of the shell, very narrow ; lip formed by one of the ribs, flat and 
broad, forming a right angle posteriorly, with scarcely anything like 
an emargination ; pillar finely wrinkled. 
Length three-eighths of an inch; breadth three-twentieths. 
Inhabits the Feejee Islands. 
This shell is much like M. Hornbeck, a West Indian species, but 
it has a much narrower aperture, fewer ribs, and the last whorl 
shorter. M. pessudata has also many more ribs, and is much less 
acuminated anteriorly. 
Figures 313, 313. a, two views of the shell, enlarged; 313, natura! 
size. 
TEREBRA CRENULATA (Lin.), Lamarck; Anim. sans Vert., x. 239. 
Sowerby ; Thesaur. Conch., pl. 41, f. 18, 19. 
Anima lemon-yellow. 
