Mr. F. P. Marrat on a new Species of Trivia. 215 
9. Oliva similis, Marrat. 
Shell ovate-cylindrical, inflated; spire small, canaliculate, 
apex dark ; colour from light drab to dark yellowish brown, 
with light-brown or purplish wavy lines, and sometimes dark 
angular spots forming two interrupted bands; suture edged 
with fine purple pencilled lines; interior purplish brown ; co- 
lumellar plaits numerous. 
10. Oliva pallida, Marrat. 
Shell cylindrically fusiform; spire short, conical; colour 
white or very pale, with faint flexuous lines and two pale brown 
bands ; interior either white or light pink. 
Eastern Seas. 
Obs. In collections this shell is not uncommon, named O, 
literata, O. scripta, or O. reticularis.. It differs from all in 
having a short spire and pale interior. 
11, Oliva oblonga, Marrat. 
(Duclos, plate 9. figs. 3 & 4, reticularis, var.) 
Shell oblong-fusiform, very thick; spire conical, elongate, 
canaliculate ; colour yellowish white suffused with ash-grey, 
with brown wavy markings, generally crowded so as to form 
two indistinct bands; interior cream-coloured; plaits almost 
obsolete. 
Central America. 
Obs. Most conchologists, when examining this shell, pro- 
nounce it distinct. 
12. Oliva truncata, Marrat. 
Shell cylindrically ovate; spire rather shortly conical, apex 
papillose; colour greyish, with zigzag dotted brown mark- 
ings; suture canaliculate, edged with pencilled brown lines ; 
aperture very pale purple, almost white. 
Cape of Good Hope. 
Obs. Shell much narrower than O. palpasta, without the dark- 
brown spots, and from a very different habitat. 
On a new Trivia. 
Trivia affinis, Marrat. 
Shell oblong-ovate, transversely coarsely ribbed ; beaks pro- 
jecting, broad; teeth acute, dorsal groove obsolete; very pale, 
but indications of colour in one of the specimens. 
Obtained from a dealer’s stock among West-Indian species. 
Obs. Resembles a large T. insecta, Mighels, but may at once 
be known by its coarse ribs and obsolete dorsal groove. 
