Colleneytes, [474]
Commissure, anterior, [49]
Comm"ssure, œsophageal, [14]
Comm"ssure, posterior, [48], [280]
Comparison of brains of Ammocœtes and Arthropod, [61]
Comp"rison of br"ins of invertebrate from Branchipus to Ammocœtes, [54]
Comp"rison of br"ins of vertebrate, [40]
Comp"rison of branchial circulation in Ammocœtes and Limulus, [174]