Pyrula. 
MOLLUSCA. MURICID^. 
347 
(Strombiformis reticulatus. Da Costa^ Brit. Conch. 117* t. viii. f. 13.) — . 
Murex reticulatus, Pult. Dorset. 43. Mont. Test. Brit. 272. — In 
sandy bays, but rare. 
Length |ths of an inch, breadth upwards of |th ; brown ; whorls strong, 
slender ; separating line minute, above which is a broad furrow, apparently 
marking the division of the whorls ; base with obsolete spiral grooves ; aper- 
ture ovate, canal short and shallow. 
326. T. suhulata. — Whorls fifteen, with two spiral rows of 
beads divided by a depressed line. 
Murex sub. Mont. Test. Brit. Sup. 115. t. xxx. f. 6 — Sound of Mull, 
near Scalasdale, Mr Laskey. 
Length |ths of an inch ; whorls slender, little raised, defined by a purplish- 
brown spiral line ; spiral furrows longitudinally striated ; basb smooth, and 
of a dark brown colour ; aperture small. 
327. permrsa. — Whorls ten, sinistral, tuberculated. 
Turbo Turritus perversus, Walk. Test- Min. Bar. 13. t. xi. f. 48 — Mu- 
rex adversus, Mont. Test. Brit. 271. — Turbo reticulatus, Don. Brit. 
Shells, t. 159.— On different places of the coast, rare. 
Length half an inch, breadth ^th ; brown ; whorls with three spiral rows 
of tubercles, the middle row the smallest ; base with two or three spiral 
ridges ; aperture oval, canal deep. 
EXTINCT SPECIES. 
1. T. comMcopi®.— -Turrited, subulated, punctated ; whorls very numerous, 
superior ones with three or four unequal tuberculated carinae, central ones 
tuberculated above, undulated below, with four or five transverse furrows ; 
lowest whorls crossed by nine or ten elongated tubercles ; aperture quadrate ; 
columella plaited ; beak short, curved — Cerithium corn. Sower. Min. Conch, 
t. cxxxviii. f. 1, 2. 4. — London Clay. 
2. T. gigantea. Turreted extremely long, spirally striated, minutely 
punctated ; upper parts of the whorls tuberculato-nodose — Cerithium gig. 
Sower. Min. Conch, t. cxxviii. f. 2 — London Clay. 
3. T. ciwc;«.— Subulate conical, with three rows of nearly equal granules 
upon each whorl, and two carinae near the edge of the base ; suture subca- 
naliculated ; pillar with one plait.— Potamides cinctus, Sower. Min. Conch, 
t. cccxl. f. 1. — Up'per Marine Formation, Headon Hill. 
Gen. LXXVIII. PYRULA. — Spire short, body-whorl ven- 
tricose retrally ; right margin of the canal patulous. 
328. V.carica . — Shell pyramidal, heavy ; body-whorl with 
a single spiral row of triangular processes. 
List. Conch, t. dcccIxxx. f. 3. 6.— Murex carica, Turt. Conch. Diet. 86. 
t. viii. f. 26.— Coast of Ireland. 
Length 6 inches, breadth 4 ; reddish-grey ; irregularly striate, and somewhat 
scaly lengthwise, near the base a few spiral striae ; whorls six, hardly raised, 
with a row of seven or eight protuberances on the last, decreasing into tu- 
bercles in the upper ones, the upper whorls are spirally striate ; outer lip 
with the margin angular at the termination of the row of hollow protube- 
rances ; pillar-lip polished. Dr Turton states, that a pair of these magnifi- 
