OLIVA. 5 



ciata; spira concavo-acuminata ; columella obscure plicata ; 

 callo antico parvo, plicis paucis ; labio crasso, extus abraso. 

 — The enamel of the spire is remarkably rich and pellucid 

 in this species. 0. obesina, Duclos, not Reeve, is the shorter 

 and more rounded var. of this, f. 17. 



11. oblonga (f. 14), Marrat. — Oblongo-subfusiformis, cras- 

 sa, lactea lutescens, cinereo nebulata, fusco angulatim notata, 

 ad suturam fasciculata ; spira conica, balteo lineato et punc- 

 tate ; columella laevigata,, callo antice angusto, plicis 5 ad 6 

 carneis, baud prominentibus ; labio crasso, extus abraso. 



12. splendidula (f. 18, 19), Sowb. — Solida, subcylindracea, 

 lactea, maculis angulatis cajruleo vel albo marginatis, in 

 fasciis latis duabus majoribus notata; balteo flammulato et 

 punctate ; columella postice plicata, plicis cirrhiformibus, 

 calli antici plicis 4 purpureis, postica distanti ; labio crasso 

 abraso, extus punctato. — The plaits on the ventral part of the 

 columella are peculiarly thread-like, and the form and trian- 

 gular spots are constant. 



18. ustulata (f. 23-25), Lamk. — Subcylindracea, utrinque 

 obtusa, fusca, angulariter notata, fasciis pallidis distantibus 

 latis cincta ; spira brevi mucronata, sutura, punctata ; colu- 

 mella medio posticeque valide plicata, plicis calli antici 5, 

 anticis pictis ; apertura angusta, tumida; labio intus abraso. 

 — An obtuse, thick-set shell, banded with cream or brownish- 

 white on a dark-brown ground. 



14. hepatica (f. 27, 28), Lamb. — Quam 0. ustulata magis 

 elongata, antice magis arcuata, postice magis acuminata, 

 lactea, fasciis et lineis fuscis eleganter cincta. — A more 

 gracefully-formed and delicately-coloured shell than 0. ustu- 

 lata. 



15. Cumingii (f. 39, 40), Reeve. — Subturbinata, brevis, 

 postice subtruncata, griseo-subaurantia, lineis interruptis 

 obscuris cincta; columella, postice lasvigata, plicis calli an- 

 tici 4 latis validis purpureis ; apertura intus subcasrulea. — 

 An easily recognized shell, without the angular markings 

 which characterize the great majority of Olives. 



16. Formosa (f. 29, 30), Marrat. — Fusco-cinerea, fasciis 

 pallidis cincta, quam 0. hepatica magis fusiformis, antice 

 subexpansa, postice subattenuata. — Not so straightly cylin- 

 drical as 0. hepatica or 0. ustulata. Of an ashy complexion, 

 with the dark brown covering the greater surface. 



