Habitat ad flumen Plata (Gorriti). Mus. Brit., nost.
The eggs of this shell, contained in a transparent orbicular nidus, the size of a turtle's egg, were found thrown up on the sea-beach of the island. In the month of January they were observed in all stages of growth. A series was preserved in spirits, and presented to the College of Surgeons.
65. Columbella mitriformis.
C. testâ fusiformi, luteo-rufescente, fasciis nigro-castaneis, maculis albis tessellatâ; long. 7⁄16; lat. 3⁄16; poll.
Habitat? Mus. Brit., nost., Brod.
66. Mitra pusilla.
M. testâ ovato-acutâ, ventricosâ, fulvâ, creberrimè costatâ; costis interstitiisque striatis, basi granulosâ; spirâ brevi, anfractibus suturam supereminentibus; columellâ quinque-plicatâ; long. ⅝; lat. 5⁄16 paulo plus; poll.
Habitat? Mus. nost.
The denticules of the outer lip are arranged in pairs, at regular, and somewhat distant, intervals.