444 Dr. J. E. Gray on the " Prodrome of 14. Opegrapha Buricei, Mont. Nyl. 0. calcarea, Rbh. Exs. Ubh. 22! Thallus sat tenuis, linea nigra determinatus, superficie amylaceus vel cretaceus albus, Apothecia innata, dispersa, simplicia vel varie ramosa, late linearia (1-1*5 miliim. longa, 025 millim. lata); epithecio albo-suffuso, rimiformi. Hymenium (100 mik. altum) in hypothecio fere incolori e paraphysibus liberis et ascis clavatis (70 mik. longis, 18 mik. latis) compositum. Sporse 8"*, elongato-ellipsoidese vel late clavi-vel fusitormes, 3-septatte, hyalinse (20-26 mik. longse, 6-8 mik. crassse). Hymenium tinctura iodii vinose rubens. Spermatia cylindrica, recta, vel leviter curvula (5-6 mik. longa, 1 mik. lata). Ad rupes calcareas Algerise nee non insularum maris Adriatici. C. Species saxicolaj, sporis 2-loculanbus. 15. Opegrapha Elisce, Mass. Encephalographa, Id. Symm. 66. Exs. Auzi, Venet. 108. Thallus linea nigra determinatus, tenuissimus, e viridi flavo-cinereus. Apothecia linearia, primura solitaria, nonnihil immersa, denique sessilia et acervulos contortos formantia, margine rotundato, epi-thecio rimiformi. Hymenium hyaliuum, snperne denigratum, in hypothecio nigro, e paraphysibus gracillimis coalitis et ascis late claviformibus (40 mik. longis, 16 mik. latis) compositum. Sporse 8"®, ellipticse vel ovales, l-septatse, olivaceae (12-14 mik. longse, 6-7 mik. crassse). Ad rupes dolomiticas Italise super ioris. 16. Opegrapha aphoristica, Nyl. In lit., descriptione ampliori non addita. Ad rupes insularum Canariensium (non vidi). XLVIII. — Observations on the "Prodrome of a Monograph of the Pinnipedes, by Theodore Gill." By Dr. J. E. Gray, E.R.S., V.P.Z.S. In the fifth volume of the 'Proceedings of the Essex Institute/ published on the 7th of April, 1866, Mr. TheodSre Gill has published a " Prodrome of a Monograph of the Pinnipedes." He states that it is founded on the examination of the skins, skulls, and skeletons possessed by the Smithsonian Institution, the Academy of Natural Sciences of Philadelphia, the museum of the Essex Institute, and of Professor Wyman. It may be observed that the " Prodrome " founded on the examination of these museums does not furnish the author with a single species that has not been described in Europe; and the author informs us that they did not afford him any specimens of several well-known genera, as Monackus, Lobodon, Leptonyx, Ommatophoca,
BioStor
