Lamarck's Genera of Shells. 59 



The dolium is distinguished from the harpa, and the other shells 

 just alluded to, by having no longitudinal ribs, by their ventricose, 

 inflated and subglobularform, the spire being much shorter than the 

 lower whorl, whence the aperture is very large, and always occu- 

 pies more than two thirds of the length of the shell. Although 

 thin, some of these shells attain a very large size. They are all 

 encircled externally by transverse bands, which render the margin, 

 of the right lip crenate, from one end to the other. 

 Type. Dolium per dix*. (Buccinum perdix. Linn.) 

 Shell oblong-ovate, inflated, thin, reddish yellow, marked with 

 rows of white, crescent-shape spots ; ribs rather convex, crowded ; 

 spire slightly prominent, conical. Indian Seas. PI. v. Fig. 194. 



7 Species. 



9. Buccinum t. 



Shell oval, or ovate conical. Aperture longitudinal, with a 

 notch at the base, but no canal. Columella not flattened, turgid 

 at the upper part. 



The numerous species of which this genus still consists, although 

 much reduced by the separation of the harpa;, dolia, &c, present 

 considerable differences of aspect ; they are, however, all connected 

 by great leading characters. 



The buccina are marine, shore shells, the greater part very small, 

 though some species attain a mean, or ordinary size. Those which 

 have a callous columella, Lamarck had separated into a distinct 

 genus, under the name of nassa, but he has since reunited them to 

 the buccina. 



Type. Buccinum imdatum%. (Idem. Linn.) 



Shell ovate-conical, ventricose, transversely sulcated and striated, 

 and decussated with very delicate longitudinal strise ; longitudi- 

 nally plicate ; whitish, or yellow gray ; folds thick, oblique, wavy ; 

 whorls convex ; aperture white or yellow. Seas of Europe. PI. v. 

 Fig. 195. /58 Recent species, and 2 fossil. 



* Partridge. Lamarck's tevcuth species ; his type is D. galea. 



t A trumpet. The term is also used by Pliny, to denote a certain bhcll fish. 



t Wavy, 



