DE HISTORIA NATURAL. 
187 
Geological Survey (U. S.J Washington. — Monographs of the U. S. G. S. — 
Yol. i. Lake Bonneville. By G. K. Gilbert. Washington , 1890. 
Microscopical Society (Boyal). London. — Journal. 1891. Part. 6. 1892. 
Part. 1 á 5. 
— Charter and Bye-laws. List of Fellows, 1892. 
Museo cívico di Storia naturali di Genova . — Serie 2. a Volúmenes vii, yiii, 
ix. 1889-90. 
Museum of Compar ative Zoology at Harvard College. Cambridge, Mass. — 
Annual Report for 1890-91. Cambridge, 1891. 
— Observations on budding in Paludicella and some other Briozoa. By 
C. B. Davenport. Cambridge, 1891. (Bulletin. Yol. xxii. Núm. 1.) 
— Metamorphism of clastic feldspar in conglomérate schist. By J. E. Wolf. 
Cambridge. September, 1891. (Bulletin. Whole Series. Yol xvi. Nú- 
mero 10. (Geological Series. Yol. n.) 
— A Fourth supplement to the fifth volume of the terrestrial air-breathing 
mollusks of the United States and adjacent territories. By W. G. 
Binney. (Bulletin. Yol. xxii. Núm. 4.) 
— Amitosis in the embryonal envelopes of the Scorpion. By H. P. Johnson. 
(Bulletin. Yol. xxii. Núm. 8.) 
— Beports on the dredging operations of the West Coast of Central Ame- 
rica to the Galápagos , to the West Coast of México, and in the Gulf 
of California , in charge of Alexander Agassiz , carried on by the U. S. 
Fish Commission Steamer tAlbatross », Lieut. Commander Z. L. Tau- 
ner U. S. N. Commanding. II. General Sketch, of the Expedition of 
the « Albatross » from february to may, 1891. By Alexander Agassiz. 
Cambridge, TJ. S. A. February 1892. (Bulletin. Yol. xxm. Núm. 1.) 
— The mesoderm in teleosts: especially its share in the formation of the 
pectoral Fin. By E. R. Boyer. Cambridge, U. S. A. 1892. (Bulletin. 
Vol. xxiii. Núm. 2.) 
— On Nectonema agüe, Ver rill. By H. B. Ward. Cambridge, TJ. S. A., June 
1892. (Bulletin. Vol xxiii. Núm. 3.) 
rhysikalisch medicinischen Gesellschaft zu Würzburg. — Sitzungs-Berichte. 
Jahrgang 1891. Números 4 á 6, 9. Mitglieder, und Inhalts Verzeich- 
niss. Jahrgang 1892. Números 1 á 6. 
— Verhandluhgen. N. F. xxv Bd. Números 6 y 7. 
Smithsonian Institution. Washington. — Annual Report, for the year 1888 y 
1890. 
— Annual Report of the U. S. National Museum for the year 1888 y 1889. 
— Proceedings of the U. S. National Museum. Yol. xii y xm. 
— Bulletin of the U. S. National Museum . — Números 38, 41, 42. 
Sociedad científica argentina. Buenos-Aires. — Anales. Tomo xxxii. 1891. 
Entregas iv á vi. Tomo xxxm. 1892. Entregas i y n; iv á vi. Tomo 
xxxiv. Entrega i. 
