Astronomy. 445 
Gould) is C. ——_ (Gr.). Mucula tenuis of Gould is WV. nsa 
Reeve, and not the fenuis of Europe. Leda tenuisuicata of Stimpson is 
LL. pernula, “Teda sapotilla is L. hyperborea Lovén (?) One new genus 
is described, Dacrydium, for a shell which is supposed to be the Modiola 
vitrea of Moller. It differs from it in its “ dentes cren nulati, antico tuber- 
culiformi, postico elongato, cristis suffulti decurrentibus,” ete. The oc- 
currence of an Arca (A. glacialis) in so high a latitude is siemsiages 
9. ig gar Meddelelser fra den naturhistoriske Tomine a " Kjv- 
benhaun for Aaret 1858, With 2 plates. Copenhagen, 1849.—This 
number contains the following — :—Plante Centroamericane ; A. 
S. Oersted. Ad Bryologiam Norvegicam annotationes aliquot; ZA. Jen- 
sen. Some remarks on the soca species of the genus Aega, and on 
the i limits of the genus; C. Listken. On Stegophilus insidiosus, 
a new rom Brazil, and on its habits; J. Reinhardt. Description of 
. new s jade of Serolis, 8. Schythei; C. Liitken. Annulata Oerstediana, 
: Enumeration of the Annelides collected by Oersted and Kroyer in 
rea "West Indies and Central America; 2. Grube. Description of the 
entral American serpent-stars ; Winter-flora of Nice; C. 
Vaupell, On the dwelling of the ae Cymothoe uths of va- 
rious fishes ; Procee of the scientific meetings of the 
Natural History Society in the coe 1858. . 8. 
10. Bidrag titl Kinnedomen om Skandinaviens Amphipoda Gamma- 
ridea af R. M. Bruzenivs. (Kong. Vet. Akad. Handl. 1858,) pp. 104 
and 4 plates—A most valuable contribution to our knowledge of that 
difficult. order ea Amphipoda. 77 species are described, of which 18 
ie new. The n w genera are oe (fam. Dolichide), Autonoe 
each s 
Iii, ASTRONOMY. 
. Supposed planet between Mercury and the Sun.—At a session of the 
ieee Academy of Sciences, Sept. 12, 1859, a paper by M. LeVerrier 
was read, giving the result of his researcMes undertaken in order to ascer- 
tain the cause of the discrepancies between the gringo of Mercury as de- 
termined by observation of its transits across the sun and as required — 
theory. He finds that by adding 38 seconds to the secular motion of the 
perihelion of Mercury, these o within abou 
he cause of this disturbance. he presumes to to be either one 
Nore.—In this connection it may be worth while to state that there 
are e-alveady on record observations which make it highly probable that 
ts an 1 intra-Merearial avradee with a satellite. “Wartmann reports 
