140 
BIBLIOaRAPHY. 
t Monthly Microscopical 
Journal, Feb. 1, 1869. 
and be perfectly free from an unsightly speck of tlie half-cleaned 
foreign material. The diatoms to be obtained from Peruvian guano 
will vary, within certain limits, with the different samples of the 
guano. The common forms of Coscinodiscus may always be found; 
Eudycta oceanica often ; Aulacodiscus scdber frequently ; sometimes 
Auliscus peruvianus may be obtained. From many different trials I 
found twice a form which I take to be Aulacodiscus Peter six, and once 
only Auliscus ovalis. These I have on clean slides, and for them and 
the clean mounting I believe I am indebted to the process of selection 
which I have endeavoured briefly to describe, and but for which 
process the material from which they were taken might have been 
thrown away as useless. It is needless to say, that in deposits where 
the diatoms are small and very numerous, as also in pure gatherings 
of living diatoms, the process of selection is out of the question ; but 
in working the Moron deposit, the different kinds of guano, shell- 
cleanings, and others, it will be found to be of the greatest utility." 
Dr. Eiggs moved a cordial vote of thanks to the lecturer, and 
passed a warm eulogy on his able address, which was seconded by 
Mr. Osborne, and carried with acclamation. 
BIBLIOGEAPHY. 
Anatomic du systeme vasculaire des cryptogames vasculaires de 
France ; par H. Fremineau, docteur-en-medecine. Paris. 
Variabilite des etres organises ; par C. H. Letourneau. In-8°, 23 p. 
Versailles. 
Die Borstenwiirmer (Annelida chaetopoda) Nach systematischen 
U. Anatomischen Untersuchungen dargestellt. Privatdoc, Prosect 
Ernst Ehlers. 2 Abth (Mit Taf 12-24 in Kpfrst) gr. 4. Leipzig : 
Engelmann. 
Ub Mikroskopische Flora und Fauna krystallinischer Massenges- 
teine. 8 gr. (Eruptivgesteine). Dr. Gust Zenzsch. Leipzig : Engel- 
mann. 
Studien iib das centrale Nervensystem der Vogel u. Saugethiere, 
Prof. Ludw. Stieda. Mit 3 (Kpfr.) Taf. (in qu. 4) qr. 8. Leipzig : 
Engelmann. 
Ub Capillargefassysteme v Gasteropoden, Prof. Dr. C. Wedl. 
Mit 2 (chromolith). Taf (in qu. gr. 4) itus d. Sitzungsber d. k. 
Akad. d. Wiss. Lex. 8. Vienna : Gerold Sohn. 
Die Miocene Foraminiferenfauna von Kostej in Banat. Mono- 
graphische Schilderg : Felix Karrer. Mit. 5 (lith.) Taf. (Aus d. 
Sitzungsber d. k. Akad. d. Wiss.) Lex. 8. Vienna: Gerold Sohn. 
Die Entwicklimg der Carcinome und Sarcome. I. Abth. Krebs 
der Haut (Epithelialkrebs). Alveolarer Gallertkrebs d. Magens. 
Dr. Karl Koester. Mit 4 (lith.) Taf. Abbildgn. (in qu. gr. 4). Wiirz- 
burg : Stuber. 
