The Conchologist will find a full description of the three Mitras here figured in the Journal above mentioned. They are all of singular rarity, more particularly _strigata_ and _carinata_, as of these we have never seen second specimens. _M. strigata_ belongs to that group which contains M. _melaniana_, _scutulata,_ &c. Its country is unknown. ---- MITRA bicolor. ---- _Shell smooth, polished, fusiform, white, with a brown central band; upper part of the body whorl and spire with cancellated punctured striæ: base with simple striæ_. ---- This pretty shell seldom exceeds three-quarters of an inch in length; our figure is consequently enlarged: the pillar has four plaits. This, in conjunction with M. _casta_, _olivaria_, _dactylus_ (Lam.), and _olivæformis_ (Sw.), constitute a particular group, allied to _Conoehelix_, having the plaits extending far beyond the aperture. Inhabits the South Seas. In the Manchester Museum, and in our own. ---- MITRA carinata. _Shell slender, fusiform, brown; whorls with a single carinated ridge, and striated transversely near the suture; pillar 4-plaited._ ---- The habit of this Mitra will place it with the fusiform species; from all of which, however, it differs in not having exterior plaits, nodules, or impressed sculpture. The aperture is smooth within, and white. We have only seen one specimen, received by Mrs. Mawe, from Sierra Leone, and this was covered with a brown epidermis. * * * * * * [Illustration: TELLINA. P.I. _T. latirostra._] TELLINA latirostra. _Wide-beaked Tellen._ ---- Order Acephala.--Tribe Dimiaria (_Nob._). GENERIC CHARACTER.--Lam. Sys. 5, 519. ---- SPECIFIC CHARACTER. _Shell oblong; anterior side narrowed and angulated; both valves glossy, smooth, equally convex, and marked by very delicate radiating striæ._ _T. testâ oblongâ, purpurascente, subradiatâ, anteriùs sinuato-angulatâ, rostri margine infimo ascendente._ Lam. Syst. 5, p. 523. ---- There are few groups in Conchology, more particularly among the bivalve shells, possessing so great a union of delicacy and beauty as the Tellinæ; and perhaps there is none in which the species, from their general similarity of shape, and variability of colouring, are so little understood. For these reasons, we intend to illustrate this elegant genus very fully. The _Tellinæ_ appear to hold a station with the most typical groups of the Bivalve Mollusca; or those in which the animal can freely remove, from place to place, by the foot. In all such the shells are solid, regular, and not attached to other substances.