GASTEROPODA PECTINIURANCHIATA. 381 



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

 are his Lathira(2). ^ 



The Struthiolarije 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, which connects them with 

 Murex(3). 



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

 is a small indentation- or well marked emargination of the margin 

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



The Clavatul^e, 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 

 umbilicaied(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 Pyrulse with a plicated columella, the 

 plicae being sometimes almost insensible. 



Among these divisions of the Fusi of Brugieres, the Fasciolarije, 

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

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



culatus. Martini, III, Ixvii, 742, 743; Mur. candidus. Martini, IV, cxllv, 1339; 

 Mur. ansatus. Id. lb., 1340; M-. Isevigatus, Martini, cxli, 1319, Io20;Mur. Ion- 

 gissimus, lb., 1344; 3fur. undatus, lb., 1343; Mur. coins, L., List, 917, 10; 

 Mur. striatulus, lb., 1351, 1352; Mur.pusio, List., 914, 7; Mur. verrucosus, 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; 3Iur. despecius. 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. babilonius, L., List., 917, 11; Mur. javanus, Martini, IV, 138, and thQ 

 immense number of fossil species described by Lamarck and other conchyliologists. 



(5) Mur. rapa, Martini, III, Ixviii, 750, 753; Buccinutn bezoar, Gm., Martini, 

 III, Ixvlii, 754, 755. 



(6) Bulla Jicus, L., List., 750, 46; Murexficus,lh., 74.1. 



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

 canaliculatus, Martini, III, Ixvi, 738, 740, and lx\ii, 742, 3; Mur. spirillus, Mar- 

 tini, III, cxv, 1069; Pyrula canaliculuta, Lam., Montf., 502, whlcli appears to me 

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



(8) Mur. tulipa, L., List., 910, 911; Mur. trapezium. List., 93, 26; Mur. poly- 

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

 tini, IV, cxlvi, 1351, 1353; Mur. versicolor, lb., 1348; Mur. pardalis. Id. cxlix, 

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

 1347. 



