GASTBROPODA PECTINIBRANCHIATA. 7^ 



MuREX, Lin* 



Comprises all those shells in which there is a salient and straight 

 canalf . The animal of each subgenus is furnished Avith a jjroboscis, 

 long approximated tentacula en the external side of which are the 

 eyes, and Avith a horny operculum ; the veil on the head is wanting ; 

 and, the length of the siphon excepted, it otherAvise resembles that 

 of the Buccina. Brugiere divides them into genera, Avhich have been 

 since subdivided by Messrs. Lamarck and Montfort. The 



MuREx, Brvg. 



Includes all those which have a and salient straight canal, with varices 

 across the whorlsj. 



Lamarck aj)propriates this name to those in Avhich the varices are 

 not contiguous on two opposite lines. 



If their canal be long and slender, and the varices armed with 

 spines, they become the Murex, properly so called, of Montfort§. 



When, with this long canal, the Avarices are mere knobs, they form 

 the Brontis, Montf. || 



Some of them, Avhich, Avith a moderate canal, have projecting 

 tubes that penetrate into the sliell betAveen spiny A'-arices, constitute 

 the Typhis, Montf. ^ 



When, instead of spines, the varices are furnished Avith plicated 

 lamellcp. slashed, or divided into branches, they are the Chicoracea, 

 Montf.** Their canal is long and moderate, and their foliaceous 

 productions vary infinitely in figure and complication. 



When, Avith a moderate or short canal, the varices are mere knots, 

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

 Montf. Several species inhabit the coast of Franceff. 



If the umbilicus be AA-anting, they are his LotoriumW. 



Finally, Avhen the canal is short, the spire elevated, and the varices 

 simple, they are his Tritonium. Their mouth is usually plicated 



* This great genus forms the family siphonostoma, Blainv. 



f To which Linnaeus also added several Purpura in which the canal is not salient, 

 and all the Cerithia in which it is recurved. 



J Varices are knobs with which the animal borders its mouth, at each interruption 

 in the growth of its shell. 



§ Murex iribulus, List., 902, 22; — Mur. hrandaris, List., 900, 20; — Mur. comu- 

 tus, List., 901, 21 ; — Mur. senegalensis, Gm., and the costatus of No. 86, Adans, Se- 

 neg. VIII, 19. 



II Murex hauslellum, List., 903, 23 ; — Mur. caudatus, Martini, Conch., Ill, f. 1046, 

 1 04 9 ; — Mur. pi/rum. 



^ Murex tubifer, Roissy, Brug., Journ. d'Hist. Nat., I, xi, 3 ; Montfort, 614. 



** Murex ramosus, List., 946, 41, and all its varieties ; Martini, III, cv, ex, cxi ; 

 — Mur. Scorpio, Martini, cvi ; — Mur. saxalilis, Martini, cvii, cviii, and several others 

 not yet well characterized. 



ft Murex cufaceus, L., Seb., Ill, xlix, 63, 64 ; — Mur. trunculus, Martini, III, cix, 

 1018, 20; — Mur. miliaris, Id., vi, Vign., 36, 1 — 5; — Mur. pomum, Adaas., IX, 22; 

 — Mur. decussatus, lb., 21. 



XX Mur. lotorium, L., Martini, IV, cxxx, 1246 — 9 ; — Mur. femorale, Id., cxi, 1039; 

 — Mur, triquetcr. Born., XI, 1, 2. 



