HOMCEOSOLEN'. 
85 
Gonoecia ovoid ; attached to base of the pinnules on the obverse 
face. 
Dimensions. 
Zoarium : height 
, , maximum width of the frond 
,, diameter of branch (average) 
,, width of hranchlets 
,, length of hranchlets 
,, average distance of hranchlets 
(measured from successive carinse)... 
Zocecia : diameter 
B.M. B.M. 
D. 2948. D. 7095. 
Figd. hy Figd.No. 28, 
Lonsdale. p. 86. 
mm. mm. 
50 ... 10 
65 ... — 
1-5 ... 1-5-1-8 
1 ... — 
1-75 ... 1-5 
— ... '05-1 
Distribution. 
British : 
Chalk : Sussex ; Charing and Northfleet, Kent ; Salisbury ; Guildford ; 
Arreton Down, Isle of Wight. 
Upper Chalk — Zone of Micraster coranguinum : Gravesend; Bromley, Kent. 
Middle Chalk — Zone of M. cortestudinarium: Chatham. 
Foreign : 
Senonian — France. D’Orhigny gives a long list of Senonian localities, and 
includes in the species von Reuss’s H. carinata, which is Cenomanian, 
and the tw'o forms which are here divided between R, ramulosus and 
R. gamblei. 
Figures. 
Fig. 28, p. 86. A thin longitudinal section along a branch; 
XlOdia. Upper Chalk : Gravesend. Harford Coll. D. 7095. 
Affinities. 
This Bryozoan was included by Lonsdale in his Homceosolen 
ramulosus, to which it is undoubtedly very nearly allied, as the 
two forms di:ffer mainly in the character of the branching, so that 
fragments cannot be very certainly determined. The differences, 
however, appear sufficiently well marked to require specific or 
varietal separation. Its most easily recognized character is the 
branching. In S. ramulosus the tendency is for the branches 
to be often regularly dichotomous, and for the hranchlets to be 
usually short and taper rapidly to a blunt point, and to be given 
off irregularly and point in the same direction as the main stem. 
