M 1 T R A olivaeformis. 

 Olive-shaped Mil re. 



31. tcila olivaformi, glabra, nitida, spira brevissima, longitudinaliter rugain, 

 stria centrali transversa; columella A-plicata. 



M, Shell olive-shaped, smooth, polished, spire very short, longitudinally 

 wrinkled, vt^ith a central transverse stria, pillar four-plaited. 



I introduce the description of this diminutive and undescribed 

 shell from its affinity with the last, and as forming a most inte- 

 resting transition from the Mitres to tlie Olives : agreeing with 

 the former in the structure of the pillar and the sculptured spire, 

 and with the latter in its general form and prima facie appear- 

 ance. Its perfect resemblance, in fact, to a small olive, may have 

 occasioned its being hitherto overlooked. The spire is slightly 

 wrinkled and striated ; the teeth on the pillar very near each 

 other, slender, and four in number. The colour pale yellowish ; 

 the mouth darker, and the tip and base purple. 'We. whole shell 

 is scarcely half an inch long. 



It was received from the South Seas. 



