59 



entire ; the opening oblong, and notched at the bottom ; the columella 

 umbilicated, and slightly grooved at its base. 



Buccinum glabratum, Linn. Lister, Tab. 974, Fig. 9, is given as the 

 type of this genus by Lamarck, who mentions this genus only in his 

 Systeme dcs Animaux sans vertebres, not noticing it at all among the fossils 

 of the environs of Paris. A shell, however, exists among the Essex 

 fossils, which, except in having the columella hardly umbilicated, seems 

 very nearly to approximate to this genus, and to the particular shell 

 B. glabratum, which is given as its type. 



This shell, which I will venture to call E. glabrata, is figured 

 Plate'V, Fig. 25. 



XXIII. Terebra. A turreted and subulated univalve : the opening short, 

 and notched in the lower part. The basis of the columella twisted. 



Two species of this genus are found in the environs of Paris : T. pli- 

 catula and T. scalarina. T. plicatula is represented Plate V. Fig. 7. 



XXIV. Dolium. A subglobular ventrose univalve, ribbed circularly 

 across; the right lip dentated or crenulated through its whole length. 

 The opening oblong, ample, and notched at the bottom. 



No shell of this genus appears to have been found fossil. 



XXV. Harpa. An ovate, ventricose univalve, with longitudinal 

 compressed ribs, terminating superiorly in an angle or a point; the 

 opening notched in the lower point, and with no canal; the colu- 

 mella smooth, with an acute base. 



This genus comprises those shells which had been referred by Lin- 

 naeus to the genus Buccinum, and entirely to the species Biiccinum harpa. 

 These shells, like most of those which have been already mentioned, 

 are sea shells, and are inhabitants of the warmer climates. The only 

 shell which I have' of this genus, is one which, although it possesses suf- 

 ficient characters to mark its genus, is too much injured and involved in 

 pyrites, to allow its species to be determined. Its parallel compressed, 

 and obliquely inclined ribs, with the pointed angle at their summit, and 

 the smooth columella, completely, however, determine its genus. This 



