422 
CLAUSA. 
Fig. 60. A longitudinal section througli a specimen of var. 
imbedded in flint; X 12dia. Upper Chalk: ‘Ludston’ 
(?Ludsdown, west - south - west of Eochester). Eowerbank Coll. 
D. 4561. 
Fig. 61. A transverse section across a stem of var. crassicaulatii, 
X 12 dia. Middle Chalk : Chatham. Gamble Coll. D. 4119. 
Fig. 60 . Fig. 61 . 
Clausa glohulosa (Orb.), var. crassicaulata. Longihidiual and transverse sections. 
LIST OF SPECIMEXS. 
D. 3089. A long-stalked zoariuni, var. tenuicanlata. Upper Chalk. Bromley. 
Bowerbank Coll. Figd. PI. XYII. Fig. 1. 
D. 4555. A zoarium with the stalk long and irregular, var. crassicaulata. 
Middle Chalk. Chatham. Presented bv M. Gamble, Esq., 1889. 
Figd. PI. XVII. Fig. 2. 
D. 4100. A young zoarium growing attached to a stem oiNodelea durohrivcnsls, 
Greg. Middle Chalk. Chatham. Gamble Coll. Figd. PI. XVII. 
Fig. 6. 
D. 4566. The heads of two zoaria. Upper Chalk. S.E. England. Toulmiu 
Smith Coll. Figd. PI. XVII. Fig. 3. 
D. 4119. A specimen in flint, and a slide with a thin transverse section. 
Middle Chalk. Chatham. Gamble Coll. Transverse section figd. 
No. 61. 
D. 4206. A zoarium 14 mm. long, var. crassicaulata^ with a stem as thick as 
the head, but marked by two constrictions. Middle Chalk. 
Chatham. Gamble Coll. 
