OLIVA. 17 



167 of 0. guttata, seem to be the most characteristic re- 

 spectively ; the shading of the lines and spots by a different 

 colour is characteristic of the latter. — Ed. 



80. glandiformis (f. 173-175), Lamh. — 0. eleganti forma, 

 similis, maculis acute angulatis notata; plica postica calli 

 antici perelevata. — Intermediate between 0. elegans and 

 0. inflata, having the posterior fold of the anterior callus 

 much raised. 



81. bulbosa (f. 176, 184-192), Martini. — Crassa, inflata, 

 varie picta ; columella obsolete plicata, plicis calli anticis 4, 

 una postica tuberculari frequenter fusca; labio crasso, ro- 

 tundato. — Subject to great variation in form and colouring, 

 but distinguished by the tubercular elevation of the poste- 

 rior fold of the columellar callus. 



82. holoseeica (f. 178-181), Martini. — Crassa, inflata, 

 pallide fulva, lineis griseis aut fuscis angulatis castaneo 

 punctatis ornata, vel fere omnino castaneo pallide fasciato, 

 balteo postice albo aut pallido ; spira, breviter conica ; colu- 

 mella obsoletissime plicata, plicis calli antici obliquis ele- 

 vatis ; labio crasso, extus abraso. — Dark variety when small, 

 difficult to distinguish from some forms of 0. maura, but 

 is otherwise distinct. 



83. irisans (f. 123, 128, and 265.— Oblongo-cylindracea, 

 varie picta, plerumque intus violacea ; columellas callo antico 

 purpureo et aurantio frequenter tincto ; spira, plerumque 

 brevissima, callosa. — Chiefly characterized by its oblong 

 form and depressed, callous spire. The elongated spire of 

 fig. 128 is abnormal. 0. ornata (f. 102, 103) strongly resem- 

 bles fig. 127 of this species. 0. cylindriea (f. 193, 194) is 

 more rounded at the shoulders, and has more folds on the 

 columella. — Ed. 



84. cylindkica (f. 193, f. 194), Marrat. — Quam O. irisans 

 postice magis inflata, plicis anticis magis numerosis. — Com- 

 paring this shell with O. irisans, as represented by fig. 127, 

 there seems to be a greater roundness of shoulder and rather 

 more columellar folds in the former. — Ed. 



85. lignaeia (f. 195, 196), Marrat. — Quam O. irisans la- 

 tior, colore fumoso, maculis angulatim acuminatis fasciisque 



D 



