PvRULA. MOLLUSCA. MURICID^. 347 



(Stronibiformis reticulatus, Da Cosia, Brit. Conch. 117- t. viii. f. 13.) 



Murex reticulatus, Pult. Dorset. 43. Mont. Test. Brit. 272 In 



sandy bays, but rare. 

 Length fths of an inch, breadth upwards of |th ; brown; whorls strong, 

 slender ; separating line minute, above which is a broad furrow, apparentty 

 mai'king the division of the whorls ; base with obsolete spiral grooves ; aper- 

 ture ovate, canal short and shallow. 



326. T. subulata. — 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 ; base smooth, and 

 of a dark brown colour ; aperture small. 



327. T. perversa. — Whorls ten, sinistral, tuberculated. 



Turbo Tun-itus perversus. Walk. Test. M\n. liar. 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 ith ; 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. cornucopieE — Turrited, subulated, punctated ; whorls very numerous, 

 superior ones with three or four unequal tuberculated carinne, central ones 

 tuberculated above, undulated below, with four or five transverse fuiTows ; 

 lowest whorls crossed by nine or ten elongated tubercles ; aperture quadrate ; 

 columella plaited ; beak short, curved — Cerithium corn. Soivcr. Min. Conch, 

 t. cxxxviii. f. 1, 2. 4 — London Clay. 



2. T. ffigantea 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. cincta. — Subulate conical, with three rows of nearly equal granules 

 upon each whorl, and two carinse near the edge of the base ; suture subca- 

 naliculated ; pillar with one jilait — Potamides cinctus, Sower. Min. Conch, 

 t. cccxl. f. 1. — Upper Marine Formation, Headon Hill. 



Gen. LXXVIII. PYRULA.— Spire short, body-whorl ven- 

 tricose retrally ; right margin of the canal patulous. 



328. P„ carica. — Shell pyramidal, heavy ; body-whorl with 



a single spiral row of triangular processes. 



List. Conch, t. Dccclxxx. 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 stri.ie; 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- 



