64 WwW. C. MCINTOSH. 
In Spinther ganglionic enlargements and transverse com- 
missures similarly placed are shown by von Graff. He also 
describes optic, pharyngeal, esophageal, and other nerves 
from the cephalic ganglia. 
Circulatory System.—Schmarda was of opinion that in 
Euphrosyne polybranchia the circulation agreed with the 
general type of the Annelids. In the midventral line a large 
vessel occurs, with two smaller lateral trunks which supply the 
ovaries. The unpaired vessel gives many branches to the 
alimentary canal. On the dorsum of the alimentary canal are 
two vessels, from each of which large branches go to the 
branchie. He finds that the vessels have two coats, an outer 
longitudinal and an inner circular (his transverse) ; while the 
blood is red, and shows corpuscles ;4,™™ in size. Ehlers 
adds nothing to this description except to observe that the 
blood in Euphrosyne racemosa is colourless. 
In E. foliosa the ventral vessels are distended by the yel- 
lowish and minutely granular blood (in the preparations), and 
various branches are observed amongst the reproductive ele- 
ments, but the sections are less satisfactory as regards the 
dorsal vessels. All that can be said is that a dorsal trunk was 
seen in certain sections over the alimentary canal, and most 
frequently in a state of contraction. The inner coat of the 
larger vessels appears to be a homogeneous elastic one, no cir- 
cular striz having been observed, though such may be present 
in other forms. The outer coat certainly has longitudinal 
fibres. 
At the anterior part of the intestine the sections’ of four or 
five trunks are seen in the mid-dorsal line close to the gut or 
amongst the reproductive elements. All these are empty, the 
collapsed vessel having a dotted or cellular appearance, and 
thus different from those distended with blood in the other 
parts of the reproductive masses. Proceeding forward so as 
to bring the duodenal channel with its dense walls and 
inner surface covered with cilia into view, a grouping of these 
1 Which, unfortunately, are less complete than 1 could have wished, and no 
additional examples could be procured. 
