962 MR. F. A. POTTS ON 
Posterior Region (text-fig. 2).—In the one complete animal 
which I obtained this contained 64 segments, a much larger 
number than has ever been observed in Chetopterus (Joyeux 
Text-figure 2, 
not 
A. Chetopterus variopedatus. B. Mesochetopterus taylori. 
To show difference in form of typical segments of the posterior region. 
cir., cirrus-like appendage of the neuropodium. Other lettering as in text-fig. 1. 
Text-figure 3. 
Mesechetopterus taylori. X 325. 
Uncinus from first segment of median region. 
