408 Scientific Intelligence. 
Suecica , in which he describes 26 0 species of birds known to 
be inhabitants of Sweden. This work is distinguished from most 
others which have preceded it, by details on the manner of li- 
ving birds, the structure of their nest, the number and aspect 
of their eggs, their migrations, &c. 
44. Sharks and Rays. — M. Retzius has printed at Lund a 
thesis on the Anatomy of the genera Squalus and Raia. 
45. Fossil Tortoises. — While digging the Gotha Canal, in Os- 
trogothia, some tortoise shells were found at a depth of 15 feet. 
ENTOMOLOGY. 
46. Progress of Entomology in Sweden. — This branch of 
zoology is much cultivated in Sweden, but only in as far as re- 
gards description and systematic arrangement ; fewj have fol- 
lowed the footsteps of the celebrated De Geer, in studying the 
metamorphoses and manners of insects. 
47. Insects of Lapland. — Messieurs Quesnel and Thunberg 
have determined, either in the Memoirs of the Stockholm Aca- 
demy, or in the academic dissertations, the insects brought from 
Lapland. 
48. Synonymy of Insects. — We are indebted to M. Schcen- 
herr for an important work written in German, but published in 
Sweden, p on the Synonymy of Insects, forming 3 volumes 8vo. 
49. Insects in Amber. — M. Schweigger having very atten- 
tively examined the insects contained in the bits of yellow 
amber of the coasts of Prussia, and which at first sight 
might be thought to be the same as the present insects of 
that country, has found that they in fact often belong to the 
same genera, but not to the same species as those living at 
the present day. Among the small number of insects de- 
scribed and figured in the work of this author, we observe, 
in particular, an unknown species of scorpion, and a spider 
which differs from all the species living at present, in not 
having the head of a single piece with the thorax. M. Ger- 
mar, Professor at Halle, has given the result of a similar inves- 
tigation in an Entomological Journal, where he tries to deter- 
mine some species of those amber insects, the analogues of which 
are not found alive at the present day. 
