HETEKOPOKA. 
195 
Keeping remarks in the specimens from the Lower Greensand 
of Upware and Brickhill that a zonal arrangement of the apertures 
may be detected in parts of the zoaiium. 
LIST OF SPECIMENS. 
Var. lohata series, with lobate branches. 
D. 7399. 
D. 7402. 
D. 7403. 
D. 7404. 
D. 7406. 
D. 7407. 
D. 7408. 
D. 7411. 
D. 7412. 
A large zoariura, 70 mm. long by 45-50 mm. high, Avith lobose to 
blunt branches; the cylindrical branches are about 15mm. thick. 
The mesopores number about four or a feAV more in each circle. 
Upper Greensand — zone of Sclilcenhachia rostrata. Haldon, Devon. 
Bequeathed Vicary Coll. F’igd. PI. IX. Fig. 1. 
A zoarium Avith some longer branches and many blunt lobate branches. 
IMie base is incrusting and Avas probably attached to seaAveed. 
Upper Greensand — zone of Schioenhachia rontrata. Haldon, Devon. 
Bequeathed Vicary Coll. 
A zoarium with a narrower base and longer and more regular branches, 
Avhich occasionally anastomose. The branches are 8 mm. in 
diameter. The surface is preserved in patches, shoAving the plan 
of the mesopores to be the same as that of D. 7399. Upper 
Greensand — zone of Schloenhachia rostrata. Haldon, Devon. 
Bequeathed Vicary Coll. 
Zoarium of a thick branch, 14 mm. long and 10 mm. thick, which 
biturcates at intervals of 8 mm. ; it bas a broad incrusting base 
that has groAvn around a cylindrical stem. Mesopores uniserial 
and about four in a circle. Upper Greensand — zone of Schlcen- 
hachia rostrata. Haldon, Devon. Bequeathed Vicary Coll. 
A thick branch, 15 mm. wide, 10 mm. thick, and 25 mm. long ; it 
has a hollow axis. Mesopores as in D. 7404. Upper Greensand 
— zone of Schlamhaclna rostrata. Haldon, De\mn. Bequeathed 
Vicary Coll. 
Part of a zoarium Avith irregular branches, all in one plane from a 
broad base. Mesopores as in D. 7404. Upper Greensand — zone 
of Schloenbachia rostrata. Haldon, Devon. Bequeathed Vicary 
Coll. 
Zoarium Avith a broad base, partially incrusting a shell ; the zoarium 
is broad and compressed, Avith a series of blunt lobate projections, 
all in one plane. Mesopores as in D. 7404. Upper Greensand — 
zone of Schloonhachia rostrata. Haldon, Devon. Bequeathed 
Vicary Coll. 
A flattened nodular zoarium, very corroded and with a hollow base. 
The lobate branches anastomose above, leaving a liinule. Upper 
Greensand — zone of Schloenbachia rostrata. Haldon, Devon. 
Bequeathed Vicary Coll. 
An irregular zoarium with an incrusting base, from which rise short 
thick projections, with short blunt branches from 4 to 7 mm. in 
diameter. Upper Greensand — zone of Schloenbachia rostrata. 
Haldon, Devon. Bequeathed Vicary Coll. 
