HOMCEOSOLEN". 
79 
Fig, 26. The obverse and reverse sides of a young zoarinm ; 
X lOi dia. Chalk: Charing, Xent. T. E. Jones Coll. D. 2831. 
Fjg, 26 . — HomKosolen ramalosus-, x 10^. D. 2831. 
Fig. 27. Thin longitudinal section through the end of a branch, 
showing the simple tubulate form of the zooecia ; X 9 dia. Upper 
Chalk : Beachy Head. Presented by J. W. Gregory. D. 7105. 
Fig. 27 . — HomcBosolen ramulosus; x 9. D. 7105. 
PI. IV. Fig. 2. A worn zoarium on which has grown a young 
lamellibranch. Fig. 2a, the specimen, x 2 dia. ; Fig. 2h, part of 
main branch, X 10 dia. Upper Chalk. Loc. ? (probably south- 
east of England). Old Coll. D. 4576. 
Affinities. 
This species is unquestionably the type of the genus Homxosohn. 
The specific name is open to question, as 'M.n.w.teW ^ Retepora flexuosa 
is six years older than K. ramulosus ; and MantelPs simple figure 
represents a specimen with the alciform, tapering branches of 
H. ramulosus. Nevertheless, as MantelPs figure was so small and 
