CCELENTEEATA. 



19 



SUB-CLASS II. SIPHONOPHORA. 



ORDER I. CALYCOPHORID^E. Diphyes, Praya (fig. 13), 

 Vogtia. 



vs 



Fig. 14. Physophoridse. A, Physophora Philippi: p, The pneumatophore ; n n, The 

 nectocalyces ; h h, Hydrocysts ; a a, Polypites ; t, Tentacles. B, Physaliapelagica. c, VeUtta, 

 spirans. D, One of the smaller polypites (phyogemmaria) of the same, showing (o) the mouth, 

 (c) elevations studded with thread-cells, and (m) medusoid buds. 



