
222, 
operculum, and the absence of a posterior canal, locate it inArgo- 
buccinum as a aubgenus of Zriton, with affinities to Ranella. 
P 
ey -Brittia telescopialis, spec. nov. PI. vii., figs. 1, la, 1b. SL 
Shell minute, thin. Whorls six, including the nucleus. Nucleus 
one turn and a half, smooth, with deep impressed suture, apex 
exserted. Spire-whorls sloping, nearly straight, gradated, angled at 
junction of posterior and middle fourth ; behind this the whorl is 
bevelled to the suture, which is distinct and impressed. Whorls 
sculptured with spiral lire, four to six in front of the angle, two 
behind it, flatly rounded, equidistant, wider than the interspaces. 
Longitudinal lire numerous, equidistant, about 20 in the penul- 
timate whorl, narrower than the interspaces ; in some specimens 
crossing the spiral lire and wider than them, generally most 
marked and forming conspicuous coste in the second and third 
spire-whorls; in others narrower, crossed by the spiral lire, 
giving a cancellated appearance. Body-whorl nearly cylindrical, 
angled a little below the suture and again at the periphery, 
below which it is excavately contracted to the base; provided 
with spiral lirze, two behind the upper angle, about seven between 
the angles, and nine or ten below, the most valid forming a 
minute carina at the lower angle, crossing or crossed by 18 to 20 
wider or narrower longitudinal liree continued to the base, though 
less conspicuous here. Aperture elongately rhomboidal; wider 
anteriorly. Outer lip simple, thin, crenulated, with a well-marked 
semi-circular sinus from the posterior angulation to the suture, 
lip slanting obliquely from the carina to the anterior notch. 
Columella straight, inner lip inconspicuous except behind, where 
there is a columellar callus, from which springs the acute upper 
boundary of the sinus. Notch simple, anterior extremity truncated 
obliquely to the left. Ornament uniform, rusty-brown or white. 
Length, 45 mm.; breadth, 1-25 mm. 
Habitat.—Backstairs Passage, 14 dead. 
Types in my cabinet. 
Diagnosis.—I know no Drillia with an approximate form. 
Britia pentagonalis, spec. nov. PI. vii., figs. 2, 2a. S/O 
Shell minute, telescope-shaped, rather thick. Whorls four and 
a half, without the nucleus. Nucleus absent. Spire gradated, 
whorls straight-sided in the anterior three-fourths, and bevelled 
at an angle of 45° to the posterior suture, which is distinct and 
simple. Five longitudinal ribs, continuous, narrow, erect, pro- 
minent; interspaces nearly flat, giving a pentagonal section. 
Sublenticular inconspicuous longitudinal and spiral strisx, which 
cross the ribs. Body-whorl with five longitudinal ribs, squarely 
rhomboidal, angulated near the suture, and carinated at the 































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