ll, 



68 GENUS BUCCINUM. 



68. BJJCCINUM OLIVIFORME, NOBIS. The Olive-formed Buc- 



. MASS.) 



PL XXV, fig. 99. 



B. testa ovoi'da, subgranulosa, crassiuscula, olivacea ; spira altiuscula, 

 longitudinaliter exilibus, transversim multiplicibus striis ornata ; aperturS. 

 ovata, intus ccerulescente ; labro dextro laevi, tenui, intus striato. 



Shell ovoid, subgranular, somewhat globular, not very thick, 

 spire moderately raised, composed of six rounded whirls, 

 furnished with longitudinal striae, slightly marked and crossed 

 by numerous transverse striae ; suture indistinct. Aperture 

 ovate, of a bluish gray within, and somewhat truncated at the 

 base, which is slightly emarginated : right lip smooth, thin, 

 delicately striated internally. Columella smooth, somewhat 

 excavated. This shell is of an uniform olive color ; the 

 distribution of the striae which cover it, is constantly the 

 same. 



Length 10 lines. Width 5 lines. 

 Inhabits North America. 4 



This shell was brought from New York, without its precise 

 locality being pointed out. The texture of the shell, and the 

 upper whirls, which are often carious, would indicate that this 

 species inhabits fresh water, like the Melanopsides. 



4 Wood, in the Supplement to his Index, published in 1828, figures 

 this species, plate 4, as the BUCCINUM JYoveboracensis. A very accurate 

 description of this shell, which abounds in brackish water along our whole 

 northern coast, at least, together with the organization and habits of its 

 inhabitant, was read by the lamented Thomas Say, before the Academy of 

 Natural Sciences of Philadelphia, in 1821, and published in their Journal 

 the following year, under the name of NASSA obsoleta this name will 

 undoubtedly be retained by the American Conchologist. The transverse 

 striae are constant, but the longitudinal striae are usually wanting, and 

 are often replaced by folds running the whole length of the shell, re- 

 sembling in these respects B. undatum. Kiener's description applies to 

 the young shell. TR. 



