TROCHUS. 513 



coast, and in twelve to twenty-five on the Manx coast ; 

 in from fifteen to ninety fathoms among the Hebrides 

 (M'Andrew and E. F.), where it has been taken in 

 many localities by Mr. Jeffreys ; Lamlash bay, Arran 

 (Alder) ; in fifty fathoms off Cape Wrath, and in forty- 

 five fathoms off Fair Island (M'Andrew); in seven fathoms 

 off the Dudgeon ; in thirty-five fathoms, Buchaness ; in 

 from seven to forty fathoms around the Orkneys, " the 

 individuals are not numerous anywhere; generally in deep 

 water or stony ground " (Thomas) ; Portmarnock (War- 

 ren) ; in ten fathoms Bantry bay, and sixty fathoms off 

 Cape Clear (M' Andrew). The only foreign locality re- 

 corded is Vigo bay in Gallicia, where it was dredged 

 by Mr. M' Andrew in May, 1849. 



T. tumidus, Montagu. 



Small, perforated ; whorls ventricose, more or less subscalari- 

 form ; spiral stria? extremely numerous, and very delicate : 

 markings linear, flexuous, and somewhat interrupted. 



Plate LXV. figs. 8, 9, and Animal, plate D D. fig. 2. 



Trochus tumidus, Mont. Test. Brit. p. 280, pi. 10, f. 4. — Maton and Rack. 

 Trans. Linn. Soc. vol. viii. p. 1.53. — Rack. Dorset Catalog, 

 p. 48, pi. 16, f. 9, 10. — Turt. Conch. Diction, p. 187.— 

 Flem. Brit. Anim. p. 322. — Forbes, Malac Monens. p. 23 

 (animal). — Johnston, Berwick Club, vol. i. p. 2G5. — 

 Macgil. Moll. Aberd. p. 133. — Brit. Marine Conch, p. 161. 

 —Brown, Illust. Conch. G. B. p. 18, pi. 11, f. 2, 3.— Wood, 

 Index Testae, pi. 28, f. 41. — Blainv. Faune Franc,. Moll, 

 p. 272. — Hanl. Young Conch, p. 70. 

 „ patholalus, Dillw. Recent Shells, vol. ii. p. 776. 

 „ RacketHi, Payraud. Moll. Corse, p. 128, pi. 6, f. 9, 10? — Philifpi, 



Moll. Sicil. vol. ii. p. 153. 

 „ nitens (fossil) Woodward, Geol. Norf.pl. 3, f. 10. 

 „ Nassaviensis, Recluz, Revue Zool. Cuvier. 1843, p. 107. 

 9 Margarita undidata, var. Trochiformis, Forbes, Ann. Nat. Hist. vol. xix. p. 97. 

 — Fry. Skenea Sn-puhides, Macgil. Moll. Aberd. p. 135 (fide 

 Jeff, from type). 



This shell, indeed, bears some likeness to a pygmy 

 VOL. ii. 3 u 



