GASTEROPODA. 201 
SHELL small, solid, symmetrical, elongated, ovate-conical, surface 
glossy, lines of growth very delicate, and with regular and regularly 
spaced, obtuse, revolving grooves and ridges: colour livid, paler above 
near the sutures, with faint, obliquely longitudinal flammules of 
darker, and sometimes a sutural and carinal range of pale spots: 
whorls six, forming an elongated, conical spire, slightly convex, the 
last one subangulate; suture deep: base low conical, more deeply 
striate: aperture oval, rounded at base; columella glossy, stained deep 
mulberry-colour. 
Length three-tenths of an inch; breadth one-fifth of an inch. 
Inhabits Mangsi Island, Sooloo Sea. 
A small, much elongated species, in the style of L. lineata, known 
by its regular grooving, and its mulberry-tinted columella. 
Figure 239, front view of a large specimen, magnified; 239 a, dorsal 
view of a small specimen, enlarged ; 239 4, natural size. 
Lirrorina PLENA (Gould). 
Testa parva, solida, ovata, cinereo-olivacea, interdum albido reticulata, 
strtis spiralibus insculpta: spira parva, acuta, anfractibus quinque, 
ultimo globoso, subangulato; suturd profunda: apertura parva, dila- 
tata et angulata; columella planulata, rufa, allido marginata ; fauce 
castanea, albo-zonata. 
Littorina plena, Gouin; Proceed. Boston Soc. Nat. Hist., mi. 84. 
March 1849. Expedition Shells, 53. 
SHELL small, solid, ovate, ashy-olive, sometimes faintly reticulated 
with paler: spire conical, acute; whorls five, the last globose and out 
of proportion to the others, sub-angular at its lower third; suture 
deep; surface generally marked with delicate, revolving lines; aper- 
ture rather small, sub-circular; lip produced at the base forming an 
angle; columella flattened at the base, reddish-brown, edged with 
pale: interior dusky-brown, with an anterior pale band. 
51 
