438 
CHARLES L. BOULENGER. 
Fig. 3. — A part of the distal extremity of an extended tentacle of 
L. rh o d e si se. This shows the nematocyst batteries situated at the ends 
of distinct, elevated x>apill8e of the ectoderm. ( X 260.) 
Fig. 4. — A portion of the umbrella-edge of Limnocnida tanganicse 
for comparison with fig. 2. The sense-organs marked a, a and b, b are 
pairs developed at the bases of the two tentacles bearing the same 
lettering. ( X 45.) 
Fig. 5. — A piece of the manubrium of a mature specimen of 
Limnocnida rhodesise. The ovary is developed as a ring round the 
base of the organ. ( X 45.) 
Fig. 6. — Ova of L. rhodesise as seen under a higher magnification, 
(x 260 .) 
