GASTEROPODA PECTINIBRANCHIATA. 381 



the form of the Buccina(l). When provided with an umbilicus they 

 are his Lathira(2). 



The Struthiolari^ are distinguished from the true Fusi by a bor- 

 der which surrounds their aperture, and which covers the columella. 

 The margin of the adult is inflated, vi'hich connects them with 

 Murex(3). 



When the spire is salient, the columella without plicas, and there 

 is a small indentation or well marked emargination of the margin 

 near the spine, they are the Pleurotoma, Lam. (4) 



The Clavatul^, in which the emargination is wide and reaches 

 to the spire, are also properly distinguished. 



When the spire is but slightly marked, flattened or rounded, and 

 the columella is without plicae, they are the Pyrula, Lam. Some are 

 umbilicated(5), and others not(6). 



From these Pyrulse, Montfort again separates the species with a 

 flattened spire, internally striated near the lip, by the name of Ful- 

 gur(7). They are a sort of Pyrulas with a plicated columella, the 

 plicae being sometimes almost insensible. 



Among these divisions of the Fusi of Brugieres, the Fasciolari^, 

 Lam., are distinguished by some oblique and well marked plicse on 

 the columella, near the 'origin of the siphon(8). The 



culatus, Martini, III, Ixvii, 742, 743; — Mur. candidiis. Martini, IV, cxliv, 1339; — 

 Mur. ansutus, Id. lb., 1340; — Mur. Ixvigatus, Martini, cxli, 1319, 1320; — Mur. Ion- 

 gissimus, lb., 1344; — Mur. undatus, lb., 1343; — Mur. coins, L., List, 917, 10; — 

 Mur. striatulus, lb., 1351, 1352; — Mur. pusio, List., 914, 7; — Mur. verrucous, lb., 

 1349, 1350, &c., and the numerous fossil species described by M. de Lamarck. 



(1) Mur. islandicus, Martini, IV, cxli, 1312, 1313, &c.; — Mur. antiquus, lb., 

 cxxxviii, 1294, and List., 962, 15; — Mur. despedus, Martini, 1295. 



(2) Mur. vespertilio, Id., cxlii, 1323, 24. 



(3) Mur. stramineus, Gm., Encyc. Method., 431, 1, a, b; — Struthiolaria crenu- 

 lata. Lam. 



(4) Mur. bahilonius, L., List, 917, 11; — Mur. javanus,lA!xvMm\, IV, 158, and the 

 immense number of fossil species described by Lamarck and other conchyliolog-ists. 



(5) Mur. rupa. Martini, III, Ixviii, 750, 753; — Buccinum bezoar, Gm., Martini, 

 III, Ixviii, 754, 755. 



(6) Bulla Jicus, L., List, 750, ^6\—Murex ficus,Vo., 741. 



(7) Murex perversus, L., List., 907, 27; — Mur. aruanus. List, 908, 28; — Mur. 

 canaliculatus. Martini, III, Ixvi, 738, 740, and Ixvii, 742, 3; — Mur. spirillus, Mar- 

 tini, III, cxv, 1069; — Pyrula canaliculata, La.m.,Mor\tf., 502, which appears to me 

 the same as the Mur. carica. Martini, III, Ixvii, 744. 



(8) Mur. tulipa, L., List., 910, 9l\;— Mur. trapezium. List., 93, 26; — Mur. poly- 

 gonus, List., 922, 15; — Mur. infundibulum. List., 921, 14; — Mur. striatulus, Mar- 

 tini, IV, cxh'i, 1351, 1352;— Mur. versicolor, lb., 1348; — Mur. pardalis, Id. cxlix, 

 1384; — Mur. cosiatus, Knorr., Petrif , C, n. 7; — Mur. lancea. Martini, IV, cxlv, 

 1347. 



