842 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
Family TEREBRIPORIDAE D’Orbigny, 1839. 
Bibliography. — 1839. D'Orbigny, Voyage clans l’Amerique Meridionale, vol. 5, pt. 4. Zoophytes, 
p. 22, pi. 10, tigs. 16-19. — 1866. Fischer, Etucle sur les Bryozoaires perforants de la famille 
des Terebriporides, Noovelles Archives du Museum d’Histoire Naturelle, vol. 2, pp. 293-313. — 
1SS0. Jtjllien, Description cl’une nouvelle espece de Bryozoaire perforant du genre Tercbri- 
pora D'Orbigny, Bulletin Societe Zoologique de France, vol. 5, p. 5. 
Broyozoa perforating very superficially the enamel of shells. The zoarium is 
a more or less complicated network of small canals in which the zooecia are inserted. 
A 
Fig. 279. — Genus Terebripora D'Orbigny, 
1S39. 
A, B. Terebripora ramosa D’Orbigny, 
1839. A. Zoarium enlarged : primitive 
axis longitudinal, secondary axis trans- 
verse; many small anastomising canals 
between the axes of different orders are 
seen. B. Zooecium much enlarged. The 
small canals leave the sides of the zooe- 
cium toward its middle. (After Fisher, 
1S66. ) 
The latter bear an aperture provided with 
a rimule. 
The Terebriporidae are not rare on the 
present seacoasts; nevertheless they have 
never been the object of anatomical research. 
Jullien thought that they might belong to 
the Hydroids. Their place in the Ctenos- 
tomata is doubtful. 
There are only two known genera, 
Spat hip ora Fischer, 1866, and T erebripora 
D’Orbigny, 1839, differing from each other 
in the method of branching of the small 
canals. 
Genus TEREBRIPORA D’Orbigny, 1839. 
1839. Terebripora D’Orbigny, Voyage dans 
l’Amerique Meridionale, vol. 5, pt. 4, 
Zoophytes, p. 22. 
The zooecia are arranged on the axes of minute canals, which in branching 
emerge from the primary axis at the point of attachment of a zooecium. 
Genotype. — Terebripora ramosa D’Orbigny, 1839. 
Range. — Jurassic-Recent. 
TEREBRIPORA, species undetermined. 
Plate 112, fig. 13. 
Of this species we have found only a fragment, which is a rather vague imprint 
not meriting a detailed description. The zooecia are very elongate; their dorsal, 
which is as usual very thin, is sometimes broken. The zoarium is very incomplete, 
but the arrangement of the ramifications leaves no doubt as to the generic determina- 
tion. It is useless to give a name to such a poor fragment, and the present notice is 
simply to indicate the presence of the genus in the Midwayan and to call the atten- 
tion of collectors to it. 
Occurrence . — Midway (Porters Creek formation) : Three miles north of 
Scooba, Kemper County, Mississippi (very rare). 
