444 Dr. J. E. Gray on the “ Prodrome of 
14. Opegrapha Duriei, Mont. Nyl. 
O. calcarea, Rbh. Exs. Rbh. 22! 
Thallus sat tenuis, linea nigra determinatus, superficie amylaceus vel 
cretaceus albus. Apothecia innata, dispersa, simplicia vel varie 
ramosa, late linearia (1-1°5 millim. longa, 0°25 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. Sporee 8"®, elongato- 
ellipsoideze vel late clavi- vel fusiformes, 3-septatee, hyalinze (20- 
26 mik. longe, 6-8 mik. crassee). Hymenium tinctura iodii 
vinose rubens. Spermatia cylindrica, recta, vel leviter curvula 
(5-6 mik. longa, 1 mik. lata). 
Ad rupes calcareas Algerize nec non insularum maris Adriatici. 
C. Species saxicole, sporis 2-locularibus. 
15. Opegrapha Elise, Mass. 
Encephalographa, Id. Symm. 66. Exs. Anzi, Venet. 108. 
Thallus linea nigra determinatus, tenuissimus, e viridi flavo-cinereus. 
Apothecia linearia, primum solitaria, nonnihil immersa, denique 
sessilia et acervulos contortos formantia, margine rotundato, epi- 
thecio rimiformi. Hymenium hyalinum, superne denigratum, in 
hypothecio nigro, e paraphysibus gracillimis coalitis et ascis late 
claviformibus (40 mik. longis, 16 mik. latis) compositum. Sporee 
8», ellipticee vel ovales, 1-septatee, olivaceze (12-14 mik. longze, 
6-7 mik. crass). 
Ad rupes dolomiticas Italize superioris. 
16. Opegrapha aphoristica, Ny). 
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, F.R.S., 
V..PAZ:S: 
In the fifth volume of the ‘ Proceedings of the Essex Institute,’ 
published on the 7th of April, 1866, Mr. Theod6re 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 Monachus, Lobodon, Leptonyx, Ommatophoca, 
