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Show 1868.] COMMANDER KNOCKER ON PELAGIC SHELLS. 621 rounded on both surfaces ; the terminal point strongly but gradually curved. Being damaged on the anterior part, I cannot describe it further. I do not find anything similar in Rang's work. It is the only specimen I obtained. HYALEA. 19th April 1868. This is probably a variety of H. longirostra; the rostrum much more compressed, more elevated, and curves up sooner than in the true H. longirostra. HYALEA (name not made out). 19th and 30th April. The only two days I got this shell, and I find no Hyalea corresponding to it in the work of M . Rang. The terminal and lateral points truncated and very little developed ; the dorsal plate prolonged considerably in a gentle curve and forming an obtuse point; dorsal markings three ; ventral plate much rounded (globular), striated, nearly square anteriorly. It resembles more H. quadridentata in shape, except the points and projecting plate; it is also wider in proportion. IANTHINA? 3rd and 8th April 1868. Aperture very large; spire depressed, umbilicated ; lip reflected over umbilicus; no notch ; colour deep blue and strongly striated. LITIOPA. 29th November and 4th December 1867. Resembles much the Litiopa bombyx of the Saragossa weed; and if of this species, it is worthy of notice that it should occur on both sides of the American continent, although not in quite similar latitudes. LITIOPA. 4th December. Another species, light yellow horn-colour; body-whorl very large ; sutures deep and very marked ; spire short, mam-millated (not acute as in the other) ; whorls five; aperture nearly complete. CHELETROPIS, NO. 1. Whitish cream-colour, aperture and sutures brownish ; spire short, obtuse; whorls five, the last large, strongly marked spirally, less so but very finely transversely, giving a granulated appearance; claws in three points. CHELETROPIS, NO. 2. Deep brown or horn-colour. These I found most plentifully near the Line on the Atlantic side. |