TROPHON. 439 



T. MURicATus, Montagu. 



Usually coloured, decussated by spiral costelliB and numerous 

 longitudinal ribs, the former of which are decidedly conspicuous ; 

 whorls bluntly subscalar. 



Plate CXI. figs. 3, 4, and (Animal) Plate S. S. fig. 5. 



Murex nmricaius, Mont. Test. Brit. vol. i. p. 262, pi. 9, f. 2. — Maton and 

 Rack. Trans. Linn. Soc. vol. viii. p. 149, — Turt. Conch. 

 Diction, p. 95. — Brown, Illust. Conch. G. B. p. 6, pi. 5, 

 f. 28. — DiLLW. Recent Shells, vol. ii. p. 74G. — Wood, 

 Index Testaceolog. pi. 27, f. 138. — Clark, Annals Nat. 

 Hist. 2nd ser. vol. vii. p. 112. 



Fiisits „ Fleming, Brit. Anim. p. 351 . — Forbes, Malac. Monens. 



p. 27, animal. — Brit. Marine Conch, p. 206, f. 97.— Hanl. 

 Young Conch, p. 84. — Gould, Invert. Massach. p. 293. — 

 Dekay, New York Moll. p. 149. — Reeve, Conch. Iconica, 

 vol. iv. Fusus, pi. 21, f. 88. 

 „ echmatus, J. Sowerby, Min. Conch, pi. 199, fig. 4. — Philippi, Moll. Sicil. 

 vol. ii. p. 178 (from tj-pe). 



Troplion imiricatum (fossil), Searles Wood, Crag Mollusca, p. 50, pi. 6, 

 fig. 5. 



The general shape of this shell is acutely fusiform, as it 

 tapers from the somewhat swollen middle to a fine point, at 

 either extremity. The substance is not thick, and the co- 

 louring is simple (not variegated) ranging from pure white 

 (in the boreal form) to pinkish or rufous brown, which latter 

 is the usual tint. The exterior is subcancellatedly decus- 

 sated throughout by spiral costellae and longitudinal narrow 

 sublamellar ribs ; the latter, which are not much raised, 

 are numerous (in general from thirteen to fifteen on each of 

 the principal turns), yet not so densely disposed as the former, 

 which are square-sided, convex topped, usually geniculated 

 or nodose where they cross the ribs, and having their 

 intervals sometimes mere sulci, sometimes as broad as the 

 riblets themselves. Very rarely (as in the variety echmata) 

 short prickles start up in lieu of nodules, at the intersection 



