Miscellanies. 183 
Melania, five of Pupa, six of Paludina, seven of Planorbis, four of Lu- 
cunea, two of Cyclostoma, two of Bulimus, three of Physa, two of 
Ancylus, besides some doubtful species. He had also found speci- 
mens of the Lymneus humilis, Say, and the Anodonta Ferussaciana. 
Dr. J. Wyman exhibited a portion of the lung of a sheep, in the 
bronchi of which were vast numbers of parasites, a species of Filaria ; 
they invariably occupied those portions of the bronchi most distant 
from the trachea, and were collected together in clusters of from 
ten to twenty in number. He also exhibited a dissection of the egg 
of a snake which had partially undergone the process of incubation. 
The shell was membranous, with granules of calcareous matter scat- 
tered over its surface. When the egg was first opened, the animal 
was living; the circulation could be distinctly seen; the head was 
large in proportion to the rest of the body, and its longest diameter 
at right angles to the trunk instead of being in the same line as in the 
adult. 
Dr. A. A. Govxp had ascertained that the Scutella referred to him 
at the Jast meeting was the S. bifissa of Lamarck. The Scutelle have 
a shell extremely depressed, flat on the under surface, in the center 
of which is the mouth, and between the Jatter and the edge of the 
shell is the anus. The S. bifissa is so called from its two deep emar- 
ginations ; the portion enclosed between the emarginations varies in 
its figure, sometimes projecting beyond the surrounding parts, and 
occasionally overlapping them. There is but one species of Scutella 
common on our coast, which Dr. Gould thinks is undescribed. 
Feb. 12, 1840.—Gro. B. Emerson, Esq., President, in the chair. 
Rev, J. L. Russexx, of Chelmsford, read a paper entitled ‘ Re- 
marks on the Cryptogamia of Chelmsford,” sccompenyios which 
were specimens for the oo s herbarium. — 
to were as follows: 
Squamaria rubina, Hoff., not mentioned. in Hitchcock's asdere 
of the plants of Massachusetts. This lichen is considered rare in 
other parts of New England. In Chelmsford it is one of the most 
beautiful lichens investing the surfaces of bowlders. Its synonymy, as 
ascertained by Mr. Edward ‘Tuckerman, Jr., embraces Lichen chry- 
soleucus of Hud.; Parmelia chrysoleuca, Ach.; and Lecanora chry- 
soleuca, Ach. It is found uniformly on granite bowlders in intimate 
association with supposed to be Lecidea Japicida, Ach., which also 
is not found in Hitchcock’s catalogue. It is best distinguished by the 
apothecia chiefly occurring between the areole, and by their being 
black with a margin of the same color. 
