334 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
front wall at which the slope of the front wall changes; distally it coincides with 
the lateral and distal edges of the orifice, and bears one or more pairs of spines; 
extraterminal front wall comparatively small and slightly arched; intraterminal 
front wall entirely calcareous, highly arched, often bearing 
a median ridge; aperture semicircular or slightly cribrilinid. 
(After Lang.) 
Genotype. — Dacryopora gutta Lang, 1914. 
Range. — Cenomanian-Senonian. 
Genus HARMERIA Norman, 1903. 
1903. Harmeria Norman, Notes on Natural History of East Fin- 
mark, Annals and Magazine Natural History, ser. 7, 
vol. 12, p. 107. 
“ The zooecia lack a covering membrane ; the cal- 
careous matter is very thin and brittle and there are no 
spines. They present a larger or smaller distinctly 
defined frontal area, provided with numerous pores. A 
compound operculum, feebly cliitinized. Rosette plates 
with few pores. No ovicell and no avicularia. The disci- 
form colony presents two different sizes of zooecia, larger 
inner and small outer.” (Levinsen, 1916.) 
Genotype. — Harmeria ( Lepralia ) scutulata Busk. Recent. 
Family ESCHARELLIDAE Levinsen, 1909. 
The ovicell is hyperstomial. The operculum is rigid and chitinous; it closes 
the aperture, the compensatrix and often the ovicell; its form is in rapport with 
the hydrostatic system and the 
passage of the eggs into the ovi- 
cell. 
Historical. — This family is the 
reunion of the old families of 
Microporellidae, Myriozoidae and 
Escharidae (part) of Smitt and 
Hincks. Levinsen, in 1909, having 
proved the identity of the larvae 
formed the family of Escharelli- 
doe, but the name is badly chosen, 
for it is based on an archaic 
genus which the more recent 
work will not permit us to em- 
ploy. 
Division. — According to the form of the operculum we may class the numerous 
genera of this family in the following four large groups, although there are some 
aberrant genera : 
Schizoporellae. Microporellae. 
Hippoporae. Peristomellae. 
Fig. 98. — Genus Harmeria Norman, 1903. 
A, B. Harmeria scutulata Busk. (After Levinsen, 1916.) 
A. Colony with an ovate membraniporoid aneestrula sur- 
rounded by five large and three smaller zooecia. B. An- 
cestrula with the five surrounding larger zooecia. 
Fig. 97. — Genus Dacryopora 
Lang, 1914. 
Dacryopora gutta Lang, 
1914. (After Lang.) Two 
zooecia, X 20. Senonian, 
Chatham, Kent, England. 
