HOMCEOSOLEN-. 
91 
thick lateral processes, which usually project from the stems almost 
at right angles. The character of the young zoarium, in which 
the branches are all in one plane instead of in the funnel-shaped 
Supercytis form of S. gamhlei^ is well shown in D. 4367. 
LIST OF SPECIMENS. 
D. 7281. A typical zoarium and two isolated fragments. Upper Chalk— zone 
of Micraster coranguinum. Gravesend. F. Harford Coll. Figd. 
PI. III. Fig. 8. 
60,472. A large frond (50 x 69 mm. across) with both surfaces exposed. 
Upper Chalk — zone of Micraster coranguinum. Gravesend, Kent. 
Purchased of E. Charlesworih, 1874. 
60,342. An irregular broken zoarium, 55 mm. Avide. Chalk. Loc. ? Dixon 
Coll. 
D. 4367. A young zoarium, including base and a Y-shaped branch. Identified 
by Mr. Gamble as TInicytis falcata. Middle Chalk — zone of 
2[icraster cortestudinarium. Chatham. Gamble Coll. 
D. 4400. A zoarium, .36 mm. high by 38 mm. wide. Upper Chalk. Gravesend, 
Kent. Harford Coll. 
D. 4409. A small, open, irregular zoarium ; obverse surface. Chalk. Loc. ? 
Old Coll. 
D. 4489. A small broken zoarium showing reverse surface, and fragments 
showing both surfaces. Upper Chalk — zone of Micraster 
coranguinum. GraA’esend. BoAverbank Coll. 
D. 7284. Four imperfect fragments. Chalk. Loc. ? Toulmin Smith Coll. 
8. Homoeosolen virgulosus,^ Gregory, 1909. 
Synonymy. 
Momobosolen virgulosa, Gregory, 1909. XeAV Cret. Bry. : Geol. Mag. dec. v. 
vol. vi. p. 62. 
Truncaiula tetragona, non d’Orb., Vine, 1893. Compl. Eep. : Bep. Brit. Assoc. 
• 1892, p. 334. 
Homoeosolen alternatus, pars, Vine, 1893. Ibid. p. 334. 
Semicytis {francqnna? ^'Orh.), pars, Vine, 1893. Ibid. p. 333. 
Diagnosis. 
Zoarium an erect, irregular tuft, which is repeatedly branched. 
The branching is irregularly dichotomous. 
Apertures : the peristomal bundles are transversely elongated, 
and may occur in biserial ridges with as many as five apertures 
in each horizontal, transverse row. Some groups of apertures 
are irregularly triserial. 
Heverse surface fluted. 
So named from its bushy fomi. 
