GASTEROPODA PECTINIBRANCHIATA. 375 



The name of Buccinum is especially applied by M. de Lamarck to 

 those in which the colum.ella is convex and naked, and the margin 

 without plicae or varix. Their foot is moderate, their proboscis long 

 and thick, and their penis, frequently, excessively large(l). In the 



Nassa, Lam., 

 The side of the columella is covered by a more or less broad and 

 thick plate, and the emargination is deep, but without a canal. The 

 animal resembles that of a true Buccinum, and there are gradual 

 transitions among the shells, from one subgenus to the other(2). M. 

 Delamarck calls 



Eburna, Lam., 



Those, which to a smooth shell without a plicated margin, add 

 a widely and deeply umbricated columella. The general form of 

 their shell is closely allied to that of the Olivae. Their animal is 

 unknown(3). 



Ancillaria, Lam. 



The same smooth shell, and at the lower part of the columella a 

 marked lip; there is no umbilicus, neither is the spire sulcated. 

 The animal of several species resembles that of the Olivae, the foot 

 being still more developed(4). The same naturalist calls 



DoLiuM, Lam. 

 Those in which projecting ribs, that follow the direction of the 



(1) Buccinum undulatum, L., List., 662,14; — Bucc glaciale,'L.-^ — B. anglicum. 

 List., 963, 17; — B. porcatum. Martini, IV, cxxvi, 1213, 1214; — B.lsevissimum, Id., 

 cxxvii, 1215, 1216; — B. igneum, lb., 1217; — B. carinatum, Phips, Voy., XII, 2; — 

 B. solutum, Naturf., XVI, ii, 3, 4; — B. strigosum, Gm., No. 108, Bonan., Ill, 38; — 

 B. glabeirimum, Martini, IV, cxxv, 1177, 1182; — B. strigosum, lb. 1183, 1188v — 

 B. obtusum, lb., 1193; — B. coronatum, CXXl, 1115, 1116. 



(2) Buccinum arculariu, List., 970, 24, 25; — B. pullus, List., 971,26; — B. gib- 

 hosulum, List., 972, 27, and 973, 28; — B. tessellatum. List., 975, 30; — B. fossile. 

 Martini, III, xciv, 912, 914; — B. marginatum, Id. cxx, 1101, 1102; — B. reticula- 

 turn. List., 966, 21; — B. vulgatum.. Martini, IV, cxxiv, 162, 166; — B. stolutum, 

 lb., 1167, \\.&9;—B.glans, List, 981, 40;— 7?. papillosum, Ust., 969,23;— B. niii- 

 dulum. Martini, IV, cxxv, 1194, 1195. 



(3) Buccinum glabratum. List., 974, 29; — B. spiratum, List., 981, 41; — B. 

 zeylanicum. Martini, IV, cxxii, 1119. 



(4) Ancillaria cinnumomea, Lam., Mart., II, pi. 65, f. 731; Voluta ampla,Gm., 

 Mart., lb. f. 722, and the species described by M. de Lamarck and fig'uredin the 

 Encyc. Method., 393. See also the Monograph, No. o&, p. 72, of the Ancillariae 

 by M. W. Swainson, Journ. of the Sc. and Arts, No. 36, p. 272. 



