346 



BULLETIN 106, UNITED STATES NATIONAL MUSKUM. 



The recent species of this genus are : 



Lacerna hosteensis Jullien, 1888. 



Lacerna (Schizoporella) eatoni Busk, 1879. 



Lacerna (Schizoporella) ornata Calvet, 1909. 



Lacerna (Schizoporella) insignis Hincks, 1881. 



The fossil species are : 



Lacerna (Lepralia) sequenzai Reuss, 1869. 



Lacerna (Lepralia) siissi Reuss, 1869. 



Lacerna (Schizoporella) fissa Koschinsky, 1885. 



Lacerna (Lepralia) fuchsii Reuss, 1874. 



Lacerna (Schizoporella) convexa MacGillivray. 18!)5. 



Lacerna (Schizoporella,) nitens MacGillivray, 18!)f>. 



O 



C '25 



1888.) 

 (After 



D 



E'8s F 



FIG. 103. Genus Lacerna Jullien, 18SS. 



A-D. Lacerna hosteensis Jullieu, 1888. A. Zooecia, X 25. (After Jullien, 

 B. Zooecia with ancestrula, X 25. C. Ovicelled zooecia, X 25. D. Operculum, X 85. 

 Waters, 1904.) 



E, F. Lacerna eatoni Busk, 1879. E. Operculum, X 85. (After Waters, 1904.) F. Oper- 

 culum of the variety areolata, X 85. (After Calvet, 1910.) 



Lacerna (Schizoporella) nitidissima Maplestone, 1901. 



Lacerna (Schizoporella) cavolini Neviani, 1895. 



Lacerna (Schizoporella) ovalis Maplestone, 1901. 



This genus is very closely related to Stephanosella. Lacerna differs in the 

 larger and more numerous areolae, the presence of spines, and the place of the 

 avicularium below the aperture. 



LACERNA JACKSONENSIS, new species. 

 Plate 44, figs. 13-16. 



Description. The zoarium incrusts other bryozoa. The zooecia are distinct, 

 very little elongated, separated by a furrow; the frontal is somewhat convex, 

 smooth, and bordered by a line of large closely arranged areolae; a pleurocyst 



