400 
CAVAEIA. 
FiaUEE. 
Pig. 54. Longitudinal section of a branch, X 1 1 dia. Maastrichter 
Kreide : Maastricht. Busk Coll. D. 7090. 
Fig. b^.— Cavaria ramosa,TL 2 L^. Longitudinal section. 
LIST OP SPECIMEXS. 
D. 1351. A thin branch (on slide) . Maastrichter Kreide, Maastricht. Vine 
Coll. Apparently identified by Pergens. 
D. 6394. Six fragments (on slide) . Maastrichter Kreide. Bemelen. Busk Coll. 
D. 7090. Transverse and longitudinal sections (on slides). Maastrichter Kreide. 
Maastricht. Busk Coll. Fig. 54. 
D. 6392. A fragment, on slide with Retecava carinata (Rom.). Maastrichter 
Kreide. Maastricht. Busk Coll. 
D. 3721. Two fragments (in tube). Maastrichter Kreide. Maastricht. 
Gamble Coll. 
D. 3775. A fragment (on slide) . Maastrichter Kreide. Falkenberg. Gamble 
Coll. 
D. 6306. A thin fragment (on slide) . Mucronatenkreide. Riigen. Laur Coll. 
D. 6282. A branch (on slide) . Mucronatenkreide. Riigen. Lairr Coll. 
DOUBTFUL AND UXBEPRESEXTED SPECIES. 
1. ? hagenowi, Kade, 1852. 
Syn. Cavaria hagenowi^ Kade, 1852. Los. Verst. Schanzenb. p. 32. 
Char. — Thin, cylindrical stems with spiral apertures and longitudinal furrows. 
Distrib. — Drift : Schanzenberg, North Germany. 
2. ? heteroporacea, Kade, 1852. 
Syn. Camria heteroporacea, Kade, 1852. Los. Verst. Schanzenb. p. 32. 
Char. — Thick branched stems : on one surface there are large and small apertures. 
Distrib. — Drift: Schanzenberg, North Germany. 
