236 MOLLUSCA. 
suture well defined, the last whorl half the length of the shell, sub- 
elobose; beak short and buccinoid; aperture one-third the length of 
the shell, narrow; lip angular retrally, regularly arcuate; inner lip 
arched retrally, smooth; tip of beak and interior dark chestnut, with 
a narrow, white fascia. 
Length two-fifths of an inch ; breadth three-twelfths of an inch. 
The last whorl and beak are unusually short, with much the aspect 
of a Mangeha. ‘The colouring of the aperture is very decided, while 
the surface looks dead and chalky. 
Figures 286, 286 a, two views of the shell, somewhat enlarged. 
Movrex (Trophon) rruricosus (Gould). 
Testa parva, tenuis, subrhomboidea, straminea: spira anfractibus 
quingue ad sex angulatis, superné concavo-dechivibus, serie mediant 
spinarum armatis, spints ad sex tubulosts, sub-furcatis, recurvo-adscen- 
dentibus ; anfractu ultimo series tres spinarum lamelhis longitudi- 
nalibus conjunctarum gerente: apertura ovato-trigona, dimidiam 
longitudinis teste adequans ; rostro brevi, deatrorsum deflecto. 
Murex (Trophon) fruticosus, Goutp; Proceed. Boston Soc. Nat. 
Hist., iii. 143. May 1849. Expedition Shells, 65. 
SHELL small, thin, straw-coloured, destitute of sculpture, short 
rhomboidal-fusiform. Whorls five or six, angular, the posterior 
portion concavely sloped, the upper ones armed with a single median 
series of long, slender, recurved and ascendent tubular spines, about 
six in number; the body whorl with two series, the lowest of which is 
smallest; these spines are longitudinally connected by a delicate 
lamellar varix, and are, as it were, forked by a minute supplemen- 
tary rusty spine at their bases; another series surrounds the beak. 
Aperture half the length of the shell, triangular-ovate ; pillar smooth, 
undulate at the origin of the canal; beak short, delicate, strongly 
flexed to the right. 
Length three-fourths of an inch; breadth half an inch. 
