68 
OSCULirOKlD^. 
ridges ; the ridges are in places reduced in length into short tufts. Ridges 
separated by wide valleys. 
Distrib. — S enonian — Couiacian : Yendorae, Loir-etrCher. 
3. radiata (d’Orbigny), 1854. 
Syn. Meandrocavea radiata, d’Orbiguy, 1854. Bry. Cret. p. 985, pi. 780, 
tigs. 7-10. 
Char. — Zoariura of a thick sheet. Zooecia arranged with their apertures opening 
in short elliptical groups, which are well raised above the rest of the surface. 
Distrib.— S enonian — Campanian: Meudon, near Paris. 
HOMCEOSOLEN, Lonsdale, 1850. 
[In Dixon, Geol. Sussex, p. 307.] 
SY^"ONYMY. 
Truncatula, pars, von Ilagenow, 1851. 
,, d’Orbigny, 1854; Vine, 1893. 
Supercytis, d’Orbiguy, 1854 ; non IMacgillivray, 1895. 
Unicijtis, d’Orbigny, 1854 ; Gamble, 1896. 
Diagnosis. 
Osculiporidse with zoariiim erect and llabellate ; it is composed of 
cylindrical branches, usually in one plane. The branches are 
pinnate or dichotomous. The sub-branches may be reduced to 
mere lateral processes. The young zoaria (the Supercytis 
stage) are vase-shaped, having a flat base, narrow cylindrical 
stem, and cup- shaped head. 
Apertures confined to the anterior surface, over the whole of 
which they are irregularly distributed. 
Apertures appear crescentic in well-preserved specimens, as the 
zooecia emerge obliquely. When the lower lip is worn away 
the aperture becomes elliptical. 
Type Species. 
Homceosolen ramulosus, Lonsdale, 1850. In Dixon, Geol. Sussex, 
p. 307, pi. xviii b, figs. 3, 5 {non fig. 4). Chalk : Sussex. 
Affinities. 
This genus was described in detail, and the structure illustrated 
in a series of excellent figures, by Lonsdale in 1850. His account 
was overlooked by von Hagenow and d’Orbigny, and the name 
