380 MOLLUSCA. 



and the base is provided with an umbilicus, they form the Aquilla, 

 Montf. Several species inhabit the coast of France(l). 



If the umbilicus be wanting, they are his Lotorium(2). 



Finally, when the canal is short, the spire elevated, and the vari- 

 ces simple, they are his Tritoxium. Their mouth is usually pli- 

 cated transversely on both margins. Very large ones inhabit the 

 seas of Europe(3). 



The varices are sometimes numerous, compressed, and almost 

 membranous, constituting the Tropiioxa, Montf.(4) 



At other times, they are compressed, very salient, and but few in 

 number(5), 



M. de Lamarck separates from all the Murices of Brugiere, the 



Ranella, Lam., 



Characterized by opposing varices, so that the shell is bordered 

 with them on both sides. Their canal is short, and their surface 

 studded with mere tubercles; margins of the aperture plicated(6). 



The Apolles, Monti'., are merely umbilicaled Ranell3e(7). The 



Fusus, Brug. 



Comprises all shells with a salient and straight canal, which are 

 destitute of varices. 



When the spire projects, the columella is without plicae, and the 

 margin is entire, they are the Fusus properly so called, Lam., which 

 Montfort again subdivides; when they have no umbilicus, they are 

 his Fusus(8). The shortest and .most ventricose gradually approach 



(1) Alurex cutaceus, h., Seh., l[I, xllx, 63, 64; — Mur. trunculus. Martini, III, 

 cix, 1018, 20; — Mur. miliaris, Id., iii, Yiga., 36, 1 — 5; — Mur. pomum, Adans., * 

 IX, 22; — Mur. decussatus, lb., 21. 



(2) Mur. lotorium, L., Martini, IV, cxxx, 1246 — 9; — Mur. femorale. Id., cxi, 

 1039;— Mur. friqucter. Born., XI, 1, 2. 



(3) Mur. trifonis, L., List., 959, 12; — Mur.maculosus, Martini, IV, cxxxii, 1257, 

 1258; — Mur. ausiralis, Lam., Martini, IV, cxxxvi, 1284; — Mur. pileare. Martini, 

 IV, cxxx, 1243,48,49; — Mur. argus. Martini, IV, cxxxi, 1255, 1256; — Mur. rubi- 

 cula. Id., cxxxii, 1259, 1267. 



(4) Mur- magellanicus. Martini, IV, cxxxix, 1297. 



(5) Mur. tripierus, Born., X, 18, 19; — Mur. obeliscus, Martini, III, cxi, 1033, 

 1037. 



(6; N.B. They are the Mur. bufo, Montf., 574;— Mur. rana. List., 995, 28;— 

 Mur. reticularis, List., 935, 30; — Mur. affinis, and tlie species or varieties of Mar- 

 tini, 1229, 30, 31, 32, 33, 34, and 1269, 70, 71, 72, 73, 74, 75, 76. 



(7) Murex gyrinus. List., 939, 3 t. 



(8) Mur. cochlidium, Seb. Ill, Iii, 6; — Mur. morio. List., 928, 22; — Mur. canali- 



