348 BRITISH ENTOMOSTRACA. 
cesses like rudimentary legs, rising from beneath the first 
joint of the tail.” At this time Mr. Salter had not seen 
a specimen with ova. Shortly afterwards, however, he 
had an opportunity of examining a female loaded with 
eggs, upon which he remarks : “ Another use, perhaps 
the especial use, of these two little appendages at the 
base of the tail seems to be shown ; their position exactly 
fits them to become a means of supporting and keeping 
in its place the cluster of eggs. Now with regard to the 
eggs themselves, the great size of the cluster, and the 
unyielding nature of the integuments of the animal, seem 
to be the causes of their external position. I think the 
cluster consists of two layers, the one continuous, the 
other with an intermission down the middle, forming a 
sort of fossa for the tail. You will see from the figure 
(f. 4 a) that it has a more semi-transparent line down the 
middle, corresponding in size with the tail, and in the 
same position. Doubling then the number of a single 
layer, and subtracting for the intermission (40+40 — 10), 
the number of ova would be about 70. Its abdomen, 
for such its tail clearly is, is evidently simple, and merely 
bifurcated at the end. It has a canal, the contents of 
which had a very singular and regular up-and-down 
movement, synchronous with what appeared to be a cir- 
culatory or respiratory movement of the viscera near the 
head.” 
