58 PROCEEDINGS OF THE jSTATIONAL MUSEUM vol.72 



confirm this because our specimens had become dried. The ectocyst, 

 moreover, is very thin. The opercular valve is semielliptical, trans- 

 verse, and measures about 0.12 mm. by 0.07 mm.; on our prepara- 

 tions it appears thicker in its median portion. The small avicularia 

 measure at the maximum 0.10 mm. by 0.05 mm.; we do not under- 

 stand their utility for zooecia relatively so large. 



Affinities. — This recent species differs from Dacryonella odonaria 

 Canu and Bassler, 1917, of the Eocene (Jacksonian) in its oval ope- 

 sium, its deeper opesiular indentations, and its unilamellar zoarium. 



Biology. — The colonies have a light rose color. Our specimens 



nwere dredged alive 

 /- — \ and were in repro- 

 1/ \ ^—7-^ duction January 17, 

 H B c o 1885. Thisisaspe- 



Fia. 8.— Opekcular valves of Opesiulae. A. Daceyonella typica, ^^^^ ^^ Cieep WatCrS 

 NEW SPECIES. Valve somewhat thickened in the middle. /?• and a COmmcnsal of 



FLORIDINELLA TYPICA, NEW SPECIES. C, D. FLORIDINA ANTIQUA ,1 • . 



smitt, 1873. E. MicROPORA cosiacea esper, 1791 '^"^ marmc currents. 



We have observed 



some cases of total regeneration in the vicinity of the ancestrula. 



Occurrence. — Albatross Station D. 2319, north of Cuba; 23° 10' 



37" N.; 82° 20' 06'' W.; 143 fms.; gray coral. 



Albatross Station D. 2320, north of Cuba; 23° 10' 



39" N.; 82° 18' 48" W.; 130 fms.; fine coral. 

 Albatross Station D. 2160, off Habana, Cuba; 23° 10' 



31" N.; 82° 20' 37" W.; 167 fms.; coral. 

 Pliocene: Minnitimmi Creek, Bocas Island, Almi- 

 rante Bay, Panama. 

 Cotypes.— Cat. Nos. 7484, 7485, 70838, U.S.N.M. 



Genus FLORIDINELLA Canu and Bassler, 1917 



The ovicell is endozooecial and separated from the zooecia by a 

 fold. The polypidian convexity is not prominent. The opesiular 

 indentations are large and rounded. The opesium is constricted by 

 two symmetrical lateral teeth at the level- of the opercular articula- 

 tion. 



Genotype. — Floridinella viclcsburgica Canu and Bassler, 1917. Re- 

 cent genotype, F. typica, new species. 



We based this genus on fossil specimens from the Oligocene (Vicks- 

 burgian), but the study of recent specimens has not caused us to 

 make any changes in our diagnosis. As in similar cases, the recent 

 species should be accepted as a second genotype. 



The opercular valve is supported on two small lateral condyles, but 

 it is always adjacent to the mural rim. In Floridina, on the con- 

 trary, it is isolated from the mural rim. Moreover, on our specimens 



