70 



MOLLUSCA. 



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*. M. 

 Delamarck calls 



Eburna, Lam., 



Those, wliich 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 Olivee. Their animal is unknown f. 



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 suhated. The 

 animal of several species resembles that of the Olivee, the foot being 

 still more developed :J:. The same naturalist calls 



DoLiuji, Lam. 



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

 whorls, render the margin undulated; the inferior vvliorl is ample and 

 ventricose. Montfort subdivides them into 



DoLiuM, properly so called, where the lower part of the columella 

 is twisted§, and into 



Perdix, where it is trenchant. || 



Their animal has a very large foot, widened before ; a proboscis 

 longer than its shell, and slender tentacula, on the external side of 

 which, and near the base, are the eyes; the head has no veil, nor has 

 the foot an operculum. 



Harpa, Lam. 



The Harpae are easily recognized by the projecting, transverse ribs 

 on the whorls ; the last of which forms a lip on the margin. The 

 shell is beautiful, and the animal has a very large foot, pointed behind, 



* Buccinum arcularia, List., 970, 24, 25 ; — B. pulbts, List., 971, 26; — B. yib- 

 hosulum, List., 972, 27, and 973, 28 ; — B. tesseUutum, List., 975, 30 ; — B./ossile, 

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

 fMw, List., 966. 21: — B. vuhjatum, Martini, IV, cxxiv, 162, 166; — B. stolatum, 

 lb., 1167, 1169 ; — B. glans, List., 981, 40; — B. pajnllosum, List., 969, 23 ; — B. 

 nifidulum, Martini, IV, cxxv, 1194, 1195. 



f Buccinum ylahralum, L.\st., 974, 29; — B. spiratum, List., 981, 41 ; — B. zey- 

 laniaim, Martini, IV, cxxii, 1119. 



X Ancillaria cinnamomea, Lam., Mart., II, pi. 65, f. 731 ; I'oluta ampla, Gm., 

 Mart., lb. f. 722, and the species described by M. de Lamarck and figured in the 

 Encyc. Method., 393. See also the Monograph, No. 36, p. 72, of the Ancillarise by 

 M. W. Swaiason, Journ. of the So. and Arts, No. 36, p. 272. 



§ Buc. oleurium, List., 985, 44, and Sowerb., Gen. of Shells, No. 29 : — B. galea, 

 List., 898, 18 ; — B. dolium. List., 899, 1 9 ; — B. fasciatum, Brug., Mart., Ill, cxviii, 

 1011 ; — B. pomutn, Id., II, xxxvi, 370, 371. 



II Bucc. perdix, List., 984, 43. 



