ANTICOSTI ISLAND FAUNAS. 
29 
spires were seen although the preservation was such that traces 
of them were to be expected had they been present. On the 
contrary the internal structure is rhynchonelloid and as no 
vestige of a cardinal process appears to be present the species 
apparently is to be referred to the genus Camarotoechia. Through 
the kindness of Professor Johan Kiaer the writer was able to 
obtain specimens of Rhynchonella decemplicata from etage 6 
(Zone, with Rhynchonella 10-plicata ) of the Silurian Ringerike 
section of the Kristiana region and the identity of the two species 
was clearly shown. As the European name has priority by 
over twenty-five years, the American name must yield. 
Horizon and Locality. Silurian ; Gun River (4-5), Cape Sand 
Top bay, East cliff, and west of Jupiter river. In Norway the 
species is limited to Kiaer’s zone c of etage 6, the topmost zone 
of the Lower Llandovery. 
Anticosti plesiotypes of this species are in both the Victoria 
Memorial (No. 2449) and Peabody Museums. 
Superfamily, Terebratulacea Waagen. 
Division, Terebrattjloids Schuchert. 
Family, Protozeugidae new family. 
Primitive Terebratuloids with loops like that of Magellania 
but developing without metamorphosis. The shells are small, 
smooth, biconvex with the ventral valve subcarinate and the 
dorsal with a sinus. 
Protozeuga new genus. 
(Protos, first; zeugos, a yoke). 
1882. Waldheima Davidson, Suppl. Sil. Foss. Brach., p. 76. 
This new genus is proposed to include a group of small Palaeo- 
zoic brachiopods which constitute the oldest known terebratulids 
and which are characterized by the possession of a long loop 
similar to the matured structure seen in Waldheimia or Magel- 
lania to which these little shells have been erroneously referred. 
