MUREX trilineatus. 
TAB. xlkv.— Fig. 4, 5. 
Spec. Char. Shell elongated, with many transverse 
projecting narrow bands, each obscurely divided 
into three threads. Volutions five or six. Beak, 
straight, pointed. Aperture elongated ; several 
folds within the outer lip. 
This shell is sometimes If inch long, the aperture being 
about half the length. Its form is nearly the same as the 
last, but it is more rugose, the transverse projections are 
equal, and often very neat, they are each divided by two 
obscure lines into three threads. The outer or right lip has 
nine or ten elongated plaits or teeth placed a little way from 
its edge. 
1 am indebted to the Rev. Br. Sutton for the group 
figured, it was with pyritous wood imbedded in an argilla- 
ceous-marl Septarium, from Brentford . The same species is 
found in the Clay and attached to the Septaria at Highgate. 
The figure below is from an Highgate specimen. I have 
fragments of shells from thence, which, if perfect, would be 
two inches or more in length. 
MUREX latus. 
TAB. XXXV . — Left hand lower figure. 
Spec. Char. Shell slightly veotricose, smooth, co- 
vered with alternately large and small transverse 
linear projections. Spire of five volutions, up- 
per part of each volution undulated; mouth 
strongly striated within. Beak straight, ex- 
panded, truncated. 
The apex of this shell seems to be rather acute, the mouth 
is oval, elongated into a wide and short canal: the internal 
striae terminate at some distance from the edge of the outer 
lip, which is entire. Length about three-fourths of an inch. 
The Rev. H. Steinhauer brought me this new shell from 
Plumsted, in August, 1312; I had found mutilated spe- 
cimens in 1807. 
