222 Proceedings of Scientific Societies. [ February, 
— The deaths are announced of two renowned physiologists, 
viz: Professor von Vierordt, of Tiibingen, and Professor von 
Wittich, of Konigsberg. 
— Dr. Thomas Wright, F.R.S., of Cheltenham, in whom 
geology and palzontology lose a distinguished student, died in 
December last. 
— Professor D. S. Jordan has been appointed president of the 
University of Indiana, at Bloomington, 
— Erratum: on p. 109, line 15, for dogs read days. 
A’ 
e 
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
PHILADELPHIA ACADEMY OF NATURAL Sciences, May 29.—Mr. 
Ford announced the discovery of Pholas truncata in peat near 
Sea Isle city. Mr. Redfield said that he had found this species 
thirty years ago, closely packed in salt-water turf, near Rye, Long 
Island sound, and He believed the species might be found in sim- 
ilar locations all along the coast. 
June 12.—Professor H. C. Lewis gave the results of his exam- 
ination of dust from Krakatoa, taken from the rigging of the bark 
William H. Besse. By far the greater part is powdered glass, but 
crystals of transparent plagioclase, and irregular fragments of 
_pyroxenic materials, probably augite and hypersthene, as well as 
grains of magnetite, occur. The dust does not at all resemble 
that described by Mr. Wharton, and collected in Philadelphia. 
The same speaker described a curious round, rock-like exposure 
of basalt at Blue Rock, Chester county, Pa. 
June 19.—Professor Heilprin spoke of the great difference be- 
tween the Foraminifera of the rotten limestone of Northeastern 
Mississippi and that of the ooze of the Gulf of Mexico. He also 
showed an example of Calymene niagarensis, taken from the 
Eocene above Vicksburg, but evidently washed down from the 
Silurian. Dr. McCook called attention to certain globular nodules 
of earth which were the cocoons of a tube-weaving spider of the 
genus Micaria. Spider cocoons, covered with scraped bark, old 
wood, etc., had been found before, but this was the first occasion 
in which a covering of mud had been found. The specimens 
were gathered upon fallen boards by Mr. F. M. Webster, assist- 
ant State entomologist of Illinois. 
_July to.—Professor Heilprin showed the tail-piece of a trilo- 
_ bite found at the Delaware Water Gap. He proposed to name 
a2 : the species Phacops broadheadii, Itis near P. nasutus. Its hori- 
