342 
MOLLUSCA. BUCCINID^. 
Harp A. 
4. P. desertum — Ovate, oblong, costated, transversely striated ; whorls con- 
tracted above by a rounded canal ; lip striated within. — (Buc. Brander) f. 15. 
Sower. Min. Conch, t. ccccxv. f. 1 — In London Clay. 
Gen. LXXIV. MONOCEROS. — Aperture longitudinal, emar- 
ginate retrally ; pillar reflected, with a tooth at the canal. 
314. M. hepaticus. — Whorls eight, with longitudinal ridges, 
and a spiral tuberculated ridge at the top of each whorl. 
Buc. hep. Pult. Dorset 41. Mont. Test. Brit. 243. t. viii. f. 1. — On the 
English and Irish coast, rare. 
Length an inch, breadth five-eighths ; colour brownish, sometimes spotted ; 
whorls tumid, strongly divided, smooth, striated at the base of the body- 
whorl ; outer lip thick, turning inwards to a denticulated edge. 
Gen. HARPA.— Aperture ovate, lips smooth ; canal patulous 
on the right ; pillar flattened, and pointed at the base ; 
whorls with longitudinal ridges. 
1. H. Trimmeri. — A fragment of a fossil species referred to the genus Har- 
pa, from “ its parallel compressed and obliquely inclined ribs, with the point- 
ed angle at their summit, and the smooth columella,” by Mr Parkinson, was 
found in a stratum of dark pyritous clay (probably London Clay 9) at Brent- 
ford, on the premisses of Messrs Trimmers. — Org. Rem. iii. 59. 
Gen. LXXV. DOLIUM. — Shell ventricose ; aperture lon- 
gitudinal, patulous on the right ; spiral ridges entering the 
inner lip. 
315. D. Perdioc. — Ovate, spiral ridges depressed, and broader 
than the intervening spaces. 
Buc. striatum fuscum. List. Conch, t. Dcccclxxxiv. f. 43. — B. Perdix, 
Linn. Syst. i. 1137. Pult. Dorset. 41. Mont. Test. Brit. 244. t. viii. 
f. 5. — On the English coast, rare. 
English specimens of the size of a nut ; yellowish-brown, mottled with 
white ; aperture ovate ; outer lip thin, inner pillar lip reflected, forming a 
cavity behind. 
EXTINCT SPECIES. 
1. D. woc?osMm.— Obovate, ventricose, with spiral rows of obtuse knobs. 
Cast of a species of Dolium ? — Mant. Suss. 196. — D. nod. Sower, Min. Conch, 
t. ccccxxvi. ccccxxvii. — U'p'per Chalk. 
Gen. LXXVI. BUCCINUM.— Shell ovate, aperture longi- 
tudinal ; canal slightly edged obliquely on the left ; pillar 
rounded, somewhat gibbous and bent anteally. 
316. B. wwdaifww.— Whorls seven or eight, ventricose, with 
