32 MOLLUSCA. TRACHELIPOIM. 



B. reticulatum, Lin. Shell ovate-conical, longitudinally plicate, *de- 

 cussated with transverse striae,, subgranular, whitish or brownish ; 

 the turns somewhat flattened ; aperture dentate. 1^ iEch long. 

 Pen. Brit. Zool iv. pi. 75, fig. 2. 



B. Icevigatum, Lin. Shell ovato-oblong, smooth, glossy, reddish yel- 

 low, ornamented with longitudinal flexuose brown lines ; the last 

 turn longer than the spire, marked with an articulated band of 

 black and white ; aperture smooth, white. \ inch long. Inha- 

 bits the Mediterranean Lam. vii. 274. 



** Columella callous. 



B. arcularia, Lin. Shell ovate, ventricose, thick, grayish or bluish 

 gray ; the last turn turgid, crowned with tubercles ; spiral turns 

 longitudinally plicate ; outer lip striated within. 1 J inch long. 

 Inhabits the Indian seas. Lister, pi. 970, fig. 24. 



Gen 15. DOLIUM, Lam. Buccinum, Lin. 

 Shell thin, ventricose, inflated, more commonly subglobose, 

 rarely oblong, transversely ribbed ; the outer lip dentate or 

 crenate ; aperture longitudinal, emarginate at the base. 



The shells of this genus are remarkable for their gibbous and rounded form and 

 their transverse ribs. Some of them are of very large size. 



D. galea, Lam. Shell ovato-globose, extremely gibbous, umbili- 

 cate, thin, brownish- white, with convex ribs, and anteriorly with 

 intermediate smaller ones j the whorls near the sutures excavated. 

 9 inches long. Mediterranean Sea Bonan. Recr. 3, fig. 183. 



D. olearium, Lin. Shell ovato-globose, ventricose, thin, reddish- 

 brown, with broad flattened ribs, separated by a groove ; whorls 

 channelled near the sutures. 5 inches long. Inhabits the In- 

 dian Ocean. Rumpk. Mus. pi. 27, fig. D. 



D. perdix, Lin. Shell ovato-oblong, inflated, thin, yellowish-red, 

 marked with white spots in irregular longitudinal rows; the 

 ribs crowded, somewhat convex. 4 inches long. Equatorial 

 seas of Asia, Africa, and America Lister, pi. 984, fig. 43. 

 The shell of this species is extremely thin, and its form is more elongated than 



the other individuals of the genus. 



Gen. 16. HAJIPA., Lam. Buccinum, Lin. 

 Shell ovate, more or less turgid, with parallel compressed in- 

 clined longitudinal ribs ; spire short ; aperture longitudinal, 

 emarginate below; no canal; columella smooth, flattened, 

 and pointed at the base. 



The Harps are very beautiful shells, some of which are rare and highly prized 

 by collectors. They inhabit the Indian and American seas. They have their generic 

 name from the regularity of the longitudinal ribs presenting an appearance analo- 

 gous to the strings of a harp. 



H. imperial**. Shell ovate, turgid, furnished with numerous small 

 compressed ribs ; whitish,, with interrupted reddish yellow zones ; 

 spire short, mucronate ; a small keel round the spire. 4 inches 

 long, Indian seas D'Argenv. App. pi. 2, fig. F. 



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