...Gasteropoda and Pteropoda. The identity of the velum of larval Gasteropods, with the ciliated disks of Rotifera, seems to admit of little doubt, and it...provided with a polar tuft of long cilia. "The cell, polyblast (inorula), gastrula, trochosphere, and veliger phases of molluscan development are not distinctive...

...Gasteropoda and Pteropoda. The identity of the velum of larval Gasteropods, with the ciliated disks of Rotifera, seems to admit of little doubt, and it...Chiton) provided with a polar tuft of long cilia. distinctively molluscan — the last characteristic of the higher MolInsca only — the other two of...

...Gasteropoda and Pteropoda. The identity of the velum of larval Gasteropods, with the ciliated disks of Rotifera, seems to admit of little doubt, and it...Chiton) provided with a polar tuft of long cilia. distinctively molluscan — the last characteristic of the higher Mollusca only — the other two of...

...Gasteropoda and Pteropoda. The identity of the velum of larval Gasteropods, with the ciliated disks of Rotifera, seems to admit of little doubt, and it...provided with a polar tuft of long cilia. "The cell, polyblast (morula), gastrula, trochosphere, and veliger phases of molluscan development are not distinctive...

...Gasteropoda and Ptcropoda. The identity of the velum of larval Gasteropods, with the ciliated disks of Rotifera, seems to admit of little doubt, and it would be well to have one term, e, g., velum, by which to describe both. The Trochosphere is the earlier, more or less spherical form...