Plate 6 



Page 



Fig. 1. Floridina antiqua Smitt, IS7 3 60 



The incrusting zoarium showing typical features; X 20. 

 Albatross Station D. 2405, Gulf of Mexico. 

 2-5. Cwpularia doma D'Orbigny, 1852 64 



2. Lateral view of a colony having few initial zooecia; 



X 20. 



3. Superior view (apex) of a colony with initial zooecia; 



X 20. There are eight zooecia around the ances- 

 trula. 



4. Tuberose base of a colony; X 20. 



5. Lateral view of a colony having numerous initial cells; 



X 20. 

 Albatross Station D. 2639, Straits of Florida. 

 6, 7. Floridinella typica, new species 59 



6. The incrusting zoarium, X 20, with ectocyst removed. 



7. Zooecia covered by ectocyst and showing the inter- 



zooecial tuberosities; X 20. The opercular valve 

 is supported on the mural rim. 

 Atlantic Ocean, 15 miles south of Miama, Fla. 



8, Floridinella parvula, new species 59 



The incrusting zoarium showing the small trifoliate zoo- 

 ecia; X20. 

 Albatross Station 2S39, Straits of Florida. 



9, 10. Velumella americana, new species 54 



9, The incrusting zoarium with ovicells; X 20. Some- 

 times the onychocellaria have lost their mandibles. 

 10. Zoarium in which many of the zooecia are covered by 

 the ectocyst; X 20. 

 Albatross Station D. 2405, Gulf of Mexico. 



171 



