792 G. R. VINE ON POLYZOA (BRYOZOA) FOUND IN 
branches varying in size from +4, to = inch in thickness, bul- 
ging at the nodes immediately beneath the bifurcation, where 
the measurement in breadth is about three quarters of a line. 
Zoccia disposed all round the branch in obliquely linear or trans- 
verse series, occasionally irregularly placed on the branch; about 
seven cells to the line in a longitudinal, and ten cells to the line 
in the direction of the zocecia, whether oblique or transverse ; 
mouth circular; peristome distinct, slightly tufted or raised above 
the general surface of the branch; cells tubular, punctate, and 
bounded by their own walls, occasionally produced on the margins 
of the branch. Owcia a clustering of certain cells, some of which 
are covered by a solid opercular lid. 
Richmond series, Prof. Judd, slides 8a—-d. Not represented in 
C. Moore’s series, but 1/31 is closely allied. 
I regard as allies of this species the British Great-Oolite form of 
Spiropora stramimea, Phill. (Haime, op. cit. pl. ix. fig. 1; Phill. 
Geology of Yorkshire), the S. cwspitosa, Lamx., from the Bradford 
Clay and Forest Marble, and the Hampton Cliff specimens of S. ba- 
jocensis. The S. bajocensis from the Inferior Oolite is related to this 
group; butit differs in certain peculiarities of structure from the 
forms indicated above. 
It may be well now to direct attention to some specimens or 
forms of incrustation called by authors Terebellaria, which cover with 
a thin layer of growth colonies of Entaiophora richmondiensis, and 
mimic the various outlines of its surface. This form, which will 
be presently considered, has a very different cell from that of the 
Entalophora described above; and I cannot help expressing my 
opinion that the character of Diastopora ramosissima (Haime, 
pl. ix. figs. 3a, 6) has been drawn up from a specimen of Hntalo- 
phora veecmnetl by a colonial growth of 7’. increscens, Vine, and that 
the species itself has been much misunderstood by authors who have 
not entered so minutely into details as I have been compelled to 
do with these Richmond fossils. I have in my cabinet specimens 
of the species described by Haime from the Forest Marble and also 
from the Bradford Clay and Cornbrash series, and upon the study of 
these I found the opinion now expressed. It is quite possible, 
too, that some of the specimens included under 7’. increscens may be 
regarded by other authors as Diastopora ramosissema, D’Orb. - 
10. ENnTALOPHORA RICHMONDIENSIS, Vine, var. pustulopora. 
It may be well to note the peculiar characters of colonial growth 
in this series, and to distinguish the forms by a varietal name. I 
regard these as the early stages of H. richmondiensis; but the habit 
somewhat approaches that of Pustulopora clavata, Busk (Crag 
Pol-p, 107, pli scare he) 
Richmond series, Prof. Judd, slides 9 a,b,c. Early and advanced 
stages of growth. 
