Scymnus Brevipinna. 479 
Observations. This spider, found on the sea shore, has 
the talent of adding to the strength of its web, in places 
where the wind ever moves it, by adding to it strong white 
threads in a zigzag manner, just as a seamstress darns stock- 
ings. This is usually done between two of the concen- 
tric lines, and also in a circular way in the middle of the 
web. 
Habitat. South Carolina, Pennsylvania. 
^ 
ART. XXXVI. — DISSECTION OF SCYMNUS BREVIPINNA. (LEsvEva.) 
By S. KNEzLAND Jr. M. D. 
The first named shark, a female, was recently caught on 
the coast of Massachusetts ; it was 7 feet 9 inches in length ; 
weight 975 pounds; branchial orifices five on each side. 
On opening the abdominal cavity, the peritoneum was white 
and shining, its fibres running obliquely across each other. 
The first organ seen was the liver, which entirely covered 
all the other viscera ; it adhered only at the top, to the dia- 
Phragm. "There were two lobes, meeting on the median line, 
Overlapping each other by their internal thin edge, the left 
overlapping the right: the external border thick and rounded. 
Each lobe 5 feet long, 6 inches wide and 3 thick at top, 
Sradually tapering to a blunt point 4 of an inch wide. Color 
Yellowish-white, with rosy tints here and there: the interior 
of the same light color, containing very little blood. The 
gall bladder, at the top of the left lobe, dipped down under 
the right: of the shape and size of an adult human heart: it 
Was full of a thin, dark yellow bile. Two large vessels, an 
tneh Wide cut open, ran along the internal borders of the liver, 
Sving off and receiving numerous branches to and from its 
Substance, 
