VINELLID^E. 13 
Vinella? multiradiata Ulrich and Bassler. 
PL IV, fig. 1. 
Vinella? multiradiata Ulrich and Bassler, Smithsonian Miscell. Coll. (Quart, issue), XLV, 1904, p. 276, 
pi. 68, fig. 8. 
But two specimens of this interesting and peculiar organism have been found, and, as no 
additional facts have been observed, the remarks by Ulrich and the writer in describing the 
species are quoted below. 
Original description.— The specimen on which this peculiar species is founded incrusts a crinoid col- 
umn about three-fourths of an inch in length, about two-thirds covered with the supposed Vinella. 
At intervals varying from little more than 0.5 mm. to about 2 mm. the surface of the incrusting sheet 
presents subcircular, cup-shaped depressions, 0.12 mm. to 0.2 mm. in diameter, inclosed by a low rim 
from which 14 to 20 closely arranged threads proceed in all directions. The radii are commonly disposed 
in sets of three to five, those emanating from neighboring centers overlapping and interweaving in the 
interspaces. The sheet seems to consist in most parts of at least two superposed layers. Minute 
details of structure not preserved. 
At first sight, under a low power of magnification, the specimen recalled the attached basal disks of 
articulating bryozoa, like Arthropora and Escharopora, but it soon became evident that the resem- 
blance was deceptive and extended only to the common possession of cup-shaped depressions and fines 
radiating from them. Under a higher power the radii proved to be simple threads and not radially 
arranged walls separating rows of elongated zocecial apertures, which is the structure of the attached 
disks of the articulating bryozoa referred to. Of course the much smaller size of the Vinella was appar- 
ent from the beginning of our investigations. Though now thoroughly satisfied that we are not deal- 
ing with bases of zoaria, we think it quite possible that they may prove to be the bases of isolated 
zooecia. Whatever the future may prove it to be, it impresses us as a very interesting organism, and 
it is the hope that other collectors may succeed in finding more and better specimens that has induced 
us to describe it. 
Occurrence. — Rochester shale, Lockport, N. Y. 
Catalogue number, 43144, U. S. National Museum. 
Genus ALLONEMA Ulrich and Bassler. 
Original description.— Fossil zoaria of which only the creeping base is known. This attaches itself to 
foreign bodies and consists of strings of sausage-like, bulbous, fusiform or pear-shaped internodes or 
vesicles varying greatly in size in different species. Surfaoe of internodes minutely punctate, while a 
number in each colony exhibit a larger pore-like depression, usually near one end of the vesicle or inter- 
node that is regarded as marking the point where erect zooecia were attached.* 
Allonema waldronense Ulrich and Bassler. 
PI. IV, fig. 9. 
Allonema waldronense Ulrich and Bassler, Smithsonian Miscell. Coll. (Quart, issue), XLV, 1904, p. 283, 
pi. 67, fig. 5. 
A single small example of this rather uncommon species was found incrusting the epitheca 
of a fistuliporoid in the Rochester shale at Middleport, N. Y. This specimen agrees so 
closely with the type that for purposes of identification the original description is repeated 
below. 
Original description.— Colonies small, consisting of an irregular, winding series of comparatively few 
and rather large, inflated internodes. The series branches occasionally, and a few of the internodes 
appear to be quite isolated. The internodes vary greatly in form, some being globular or elliptical, 
others pyriform, and a few of the largest bilobate. The last probably consist of two partially confluent 
vesicles. With all this variation, the internodes still remain within reasonable distance of the average 
size that we consider characteristic of the species. The average length may be placed at about 0.5 mm., 
the width at 0.3 mm. 
Occurrence. — Waldron shales of the Niagaran group, Waldron, Ind.; Rochester shale, 
Middleport, N. Y. 
Catalogue number, 43128, U. S. National Museum. 
a Ulrich and Bassler, Smithsonian Miscell. Coll. (Quart, issue), XLV, 1904, p. 279. 
