1^ 



PLATE XXI. 



1. Daphnella Winchelli, la Embryo. 2. Side view of same. 



3. Polyphemus occidentalis. 3a, 1st pair of feet. 3&, 3d pair. c. jaw. 



4. Eurycercus lemellatus? 4m. foot. 4?). jaw. 



