PLATE XXIII. 



FIG. 



1. VORTICLAVA HUMILIS, p. 132, nat. size. 



1 a. The same, magnified. 1 b. One of the capitate ten- 



tacles, mnch enlarged. After Alder. 



2. YORTICLAVA PROTEUS, p. 133, contracted. 



2 a, 2 b, 2 c, .2 d. The same, in different states. 2 c. Dia- 



gram of the tissues of the polypite. After Dr. 

 Strethill Wright. 



3. ACHARADRIA LARYNX, p. 134, magnified. 



3 a. An immature polypite. After Dr. Wright. 



4. PODOCORYNE FROBOsciDEA, p. 317 (Appendix),, highly 



magnified. 



4 a. A gonophore. 46. The oral extremity of the probos- 



cis of the polypite. c. A tentacle when con- 

 tracted. 4 d. One of the marginal tentacles of the 

 gonozooid : all magnified. From drawings by the 

 Author. 



