134 Scientific Intelligence. 
Trachynemidz, has published, in a recent number of Leonhard & Geinitz 
alrbuch, a second notice of two other species of Medusz so well pre- 
served that the family to which they belong can be ascertained beyond 
doubt. They are from the same locality, and belong to the Iaoophonty 
to the family of Rhizostemide. The restoration which Professor Heckel 
has been able to make from the specimens in his possession is quite satis- 
factory, pe the attention of geologists hevleg been called to this subject 
lephze, since it is now well known that even at the present time a kind of 
petritaetion of jelly-fishes when thrown upon sandy beaches pesdlily takes 
lace. a dhs 
9. Polym 
dissertation, oa Nihod at Upsala in 1863, has shown ee the ex- 
istence of polymorphism amoung Bryozo i 
upon the marine species of the Scandinavian coast. He shows that there 
are no less than six different forms of cells, which are probably never all 
found on the same stock. According to his view the Avicularia are only 
moins cells. Stoliczka was the first to call attention we es polymorph- 
m of Bryozoa in his studies of fossil Bryozoa. The r by Smith is 
peer behets not illustrated, and is written in a shee pusilable to 
but few any ts. 
10. Anatomy and Physiology of the Vorticellidan Parasite ne i at 
ichodi Prof. H. J. Crarg. (16 
.S 
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Feb., 1866.)—Prof. Clark, through his microscopic investigations, makes 
this parasite of the Hydra reveal much that is important with regard to 
the general structure of - b cipenert while correcting many details 
hitherto published respecting the species. One of the points ascertained 
is, that the so-called vostibelss ia te the Vorticellide, described by 
some microscopists, is an optical delusio 
11. Baird’s American Bir = A IR 21, 22, 23, pages 320-368, of 
Professor Baird’s work on American Birds have been issued. They treat 
of the Vireonidz, including the ene Vireosylvia and part of Vireo. The 
pages exhibit the same complete command of the department of Ameri- 
ae penthology so well manifested in those that have preceded them. 
Pips s On & Embryology of Star fishes—Tornaria ; by ALEXAN- 
8 pp. 8vo, with a large plate. (From the a of the 
tes Nat Hist, N. Y., vol. viii, Apr. 1866.)—This paper illustrates some 
points of special spicrest connected with the relations of starfishes to 
other Echinoderm 
IV. ASTRONOMY. 
@), whose ae 3 was emp in determining. This planet has re- 
neg Soheiaig letiene have been furnished 
by Dr. Tlatien.. 
