1893 | NEW YORK ACADEMY OF SCIENCES. 243 
larvee of Rana clamata (= R. fontinalis), I observed that the 
cloacal aperture was usually placed distinctly to the right of the 
middle line. 
Ventrally, at the point where the tail joins on to the body, 
Explanation of Figs. 1-3: Three tadpoles of Rana clamata from 
ventral aspect. Slightly enlarged; m, mouth; sp, spiraculum; f, loose 
fold of integument; r, raphe of tail; d, cloacal aperture. The dotted 
line in Fig. 1 indicates the limits of the peri-branchial chamber. 
