MEM. M. C. Z., IX. No. 3. — ACALEPHS, POLYPS, 13 



bulls in various conJitions of growth. la.-Ufi. Tentacles, lb. ta. Chymiferous tube, which lies in the 

 same spheromere as the cluster of tentacles. 



22. Medusa just escaped from its hydroid connection with a single well developed tentacle, mn. crc. Circular 



canal, man. Manubrium, r. tb. Radial tube. ta. Tentacle, ta'. Cluster of small bodies at the ten- 

 tacular base. tb. ta. Tentacular tube. vd. Velum, f. A symmetrical development of the umbrella 

 near the origin of the tentacle. 



23. The same, a day after freedom fiom hydroid (seen from oval side), can. crc. Circular canal, man. Jlanu- 



brium. pig. Pigment ? to. Tentacle, ta'. Cluster of bodies at the base of the tentacle, tb. ta. Ten- 

 tacular tube. vcl. Velum. 



