178 MOLLUSCA. 
Trochus jucundus, GouLp ; Proceed. Boston Soc. Nat. Hist., iii. 91. 
March 1849. Expedition Shells, 56. 
SHELL small, solid, low conical, composed of about six conical 
whorls, with a slight vertical portion at base; the whole girdled with 
fine, uniform, beaded lines, the alternate ones being generally smaller, 
sometimes even not beaded, and the two basal ones surrounding the 
vertical portion being larger: base a little convex, similarly sculptured 
with about twelve concentric lines, gradually diminishing from the 
centre to the circumference ; the umbilical region colourless, not per- 
forated, and with a groove-like impression beside the columella; aper- 
ture rhomboidal-orbiculate ; columella arcuate, smooth; lip simple: 
colours arranged in radiating flammules, alternately white, strawberry- 
red, and pale flesh-colour, gradually shaded into each other; on the 
base the dark or light red are distributed along the granules in a some- 
what articulate manner ; nacreous beneath. 
Axis three-eighths of an inch ; diameter two-fifths of an inch. 
Inhabits New Zealand. 
A very beautiful shell, both in colour and sculpture, quite distinct 
from any described species. 
Figures 209, 209 a, side and base of the shell; 209 4, the sculpture. 
Trocuus ELIisus (Gould). 
Testa parva, elevato-conica, imperforata, cinerea: spira anfractibus sex 
dechivibus, sutura fossali valde profunda discretis, costulis transversis 
granosis tribus (quorum intermediant minore) cincta, interspatis 
clathratis: basis convexa, costulis clathratis insculpta: apertura sub- 
circularis ; columella granulata ; labro intus sulcato. 
Trochus elisus, Goutp; Proceed. Boston Soc. Nat. Hist., i. 92. 
March 1849. Expedition Shells, 92. 
SHELL conical, solid, imperforate, cinereous: whorls six, flat, sepa- 
rated by a large and very deep channel, each of them encircled by 
three ribs, the central one less than half the size of the larger ones. 
