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BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
examination of the young zooeeia. In most of the species of Galeopsidae the spira- 
men, if it be in rapport with the hydrostatic system, might have another use, another 
function, unfortunately still unknown. It is not possible, for example, to compare 
the size of the spiramen of Galeopsis with the smallness of the orifice of the com- 
pensatrix simply closed by a rimule or by a poster of an operculum. On the other 
hand, it is quite frequent to find on the same zoariiun some zooeeia deprived of 
spiramen and which nevertheless are still living and contain a polypide. 
In the family of the Tessaradomiclae Jullien, 1903, the spiramen opens into 
the peristomie just at the level of the operculum; exteriorly it is placed much lower, 
always eccentrically and may be confused with the 
ascopore of the Acroporidae. 
We have no knowledge of the larva of the Gale- 
opsidae and Tessaradomiclae, and we think that it 
is preferable to unite them provisionally in a single 
family ; the distance of the spiramen from the oper- 
culum does not seem to us a character sufficient to 
influence the larval system. 
In the species with thick frontal the tubules cover 
the ovicell, which becomes invisible exteriorly; the 
sections permit of their discovery in the vicinity of 
the zoarial axis. 
Genus GALEOPSIS Jullien, 1903. 
1903. Galeopsis Jullien, Bryozoa provenant des Cam- 
pagnes de VHirondelle, p. 94 
The spiramen is very large and salient. The 
apertura has two cardelles. The frontal is a tremo- 
cyst or an olocyst. 
Genotype. — Galeopsis rabidus Jullien, 1903. 
Range. — Maestrichtian — Recent. 
The nature of the frontal is not always evident 
in this genus. As we have not been successful with 
our tangential sections, we have accepted the genus 
as it was defined by its author. 
The known fossil species of this genus are: 
(\ale op sis, new species. Cretaceous (Vincentown) , New Jersey and Delaware. 
Galeopsis ( Eschara ) heterostoma Reuss, 1869» Priabonian. 
Galeopsis (Eschara) duplicata Reuss, 1869. Priabonian. 
Galeopsis ( Porina ) cribraria MacGillivray, 1895. Miocene of Australia. 
Galeopsis (Porina) tuberculosa Maplestone, 1902. Miocene of Australia. 
Galeopsis (Porina) columnata Waters, 1881. Miocene of New Zealand. 
Galeopsis , new species, Plaisancian of England (Collection, Canu). 
Fig. 146. — Genus Schizotheca 
Hincks, 1877. 
Schizotheca fissa Busk, 1858. Zooe- 
cia, X 45, with and without ovicell. 
(After Hincks, 1880.) 
