346 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
The recent species of this genus are: 
Lacerna hosteensi-s Jullien, 1888. 
Lacerna (/ ‘Schizoporella ) eatoni Busk, 1879. 
Lacerna ( Schizoporella ) ornata Cal vet, 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, 1895. 
Lacerna (Schizoporella) nitens MacGillivray, 1895. 
Fig. 103. — Genus Lacerna Jullien, 1888. 
A-D. Lacerna hosteensi-s Jullien, 1888. A. Zooecia, X 25. (After Jullien, 18S8. ) 
B. Zooecia with ancestrula, X 25. C. Ovicelled zooecia, X 25. D. Operculum, X 85. (After 
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) nitidi’ssima Maplestone, 1901. 
Lacerna (Schizoporella) cavolini Neviani, 1895. 
Lacerna (Schizoporella) ovalis Maplestone, 1901. 
This genus is very closely related to Stephano sella. L,acerna 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 
