PLEUROTOMARIA. 
293 
high and 15 mm. wide. The specimens, though perfect, appear to be generally 
distorted, and probably the true measurement would come between these two. 
Locality. — From Chudleigh there are two specimens in Mr. Vicary's Collec- 
tion and another in the Woodwardian Museum. From Wolborough there is a 
specimen in the Museum of Practical Geology. 
Bemarhs. — These shells come very near to PI. suhimbricata, but in the opinion 
of Mr. Roberts and myself are certainly distinct from it. The character of the 
ridges is different, being less uniform and stronger ; the suture is deeper and more 
acute, the whorls broader and less swollen, the sinus-band higher up, and the 
transverse markings much stronger and more definite. 
Affinities. — Pleurotomaria Bodana, F. A. Romer,^ so closely resembles this 
species that I am in some doubt whether it may not be identical. Romer's descrip- 
tion is very slight and agrees as far as it goes, but his figure presents several 
differences. Its shape seems slightly shorter and more trochiform, the sinus-band 
seems smaller and of a different character, wanting the bounding ridges and being 
more strongly barred, and there are no signs of stronger ridges near the suture. 
Hence it must probably be regarded as distinct. 
Turbo canaliculatus , F. A. Romer,^ is somewhat similarly marked, but the shell 
is flatter, and the mouth is more expanded, while the main keel is lower down 
on the whorls and shows no signs of any cross marks that would suggest its 
being a Pleurotomaria. 
An indistinct specimen figured by Phillips^ as " perhaps a cast of " PI. aspera, 
Sowerby, appears not unlike this species in general character, but differs in having 
the sinus-band decidedly lower down on the whorl, and may more probably be 
referred to PI. victrix. 
12. Pleueotomaria subimbeicata, n. sp. PI. XXVIII, figs. 5 — 8. 
1855. Pleurotomaria imbricata, M'Goy (not F. A. Rimer). Brit. Pal. Poss., 
p. 393. 
Description. — Shell rather small, spirally conical, turbinate, few-whorled, 
pointed. Spire of four rather narrow, rapidly increasing volutions. Apex acute. 
Suture well-markedj obtuse. Whorls obliquely expanding in a slightly convex 
curve from the suture to the back, which is narrow and convex, and then 
curving rapidly in to form an oblique and slightly convex base. Upper whorls 
1 1860, F. A. Eomer, ' Beitr.,' pt. 4, p. 163. pi. xxv, figs. 16 a, b. 
2 1843, P. A. Eomer, • Verst. Harzgeb.,' p. 29, pi. vii, fig. 14. 
3 1841, Phillips, ' Pal. Fos.,' p. 96, pi. xxxvii, fig. 177. 
