On new species of North American Fungi. 417 some force to move it with the fingers. On changing' the water, small holes would appear in the sand, from which afterwards the siphons of the Tellens were protruded. These holes were in pairs, and about the tenth of an inch in diameter; one was a little funnel, into which the grains of sand kept sliding, the other a miniature crater of sand. After the siphons were ex-tended, they frequently bent them down and explored the surface, being evidently dissatisfied with their circumstances. Slender as the branchial siphon is in Tellina and Syndosmya, it frequently attracts particles too large to pass freely, and which after oscillating for an instant halfway down, are suddenly ex-pelled with a jerk. Besides watching the Bivalves, we sketched them whilst living, and dissected them— or at least cut them up in every possible way — when dead, and examined them with the microscope. Everything we saw confirmed the accuracy of the account given by Messrs. Alder and Hancock in the ' Ann. Nat. Hist.' XLI. — Centuries of North American Fungi. By the Rev. M. J. Berkeley, M.A., F.L.S., and the Rev. M. A. Curtis, D.D. It is proposed in this and a series of similar memoirs to cha-racterise a number of new North American Fungi, which have rewarded the researches of Curtis, Ravenel, Bennett, Michener, Olney, Peters, Sartwell, Lindheimer, Wright, and other botanists. It was intended at first to publish the whole in an especial work dedicated to North American Mycology, but it was found im-r possible to prepare so voluminous a book as a complete account of the Fungi of the United States within any fixed time, and we have therefore thought it right to publish the multitudes of new species which exist in our Herbaria by way of Prodromus, trusting that the larger work may not be put off to the Greek Calends. We ought to observe that a considerable portion of Mr. Ravenel's specimens were accompanied by copious notes, of which we have constantly availed ourselves. Indeed his name might almost uniformly have been associated with our own, were it not for the inconvenience of giving three authorities for each new species. 1. Agaricu^ (Amanita) polgpyramis,n.s. Pileo expanso nitido areolato verrucis centralibus crassis pyramidatis; stipite radi-cante, basi incrassato squamuloso, lamellis attingentibus. Curt, no. 2854. In thin woods, Nov., South Carohna. Pileus 6 inches across, pure white, shining, areolate, beset with thick, rather small, pointed pyramidal warts, especially in the centre. Stem 6-8 inches high, 1-2 inches thick, solid, iucras-Ann. S^ Mag. N. Hist. Ser. 3. Vol. xii. 29
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