*Cribrimorph” Cretaceous Polyzoa. 383 
II. Furrows between cost almost or 
UME TASIDIG gt. > aes ys ea ah XI. Tricolpopore. 
8. Avicularia few and generally one placed 
distally to each cecium ; proximal pair 
of apertural spines tend to be thickened. XII. Monoceratepora. 
2. Apertural bar forms a hump .......... XIII. Hybopora. 
3. An ayicularium medianly placed above 
apertural bar; secondary tissue covers 
intraterminal front wall.............. XIV. Hippiopora. 
b. Median area of fusion surrounded by a 
ring of solid spines; apertural spines 
BIER ORC ES nearer vt wh oetaiatens HR cde « XV. Aolopora, 
II, A secondary aperture more or less formed, 
a. Proximal shield of secondary aperture 
formed by the upward growth of a flat- 
tened shield-shaped apertural bar, not 
displaying a thickened median spine; 
distal shield formed by fusion of distal 
SUIS EG acy aly t's ta a spel <P aidishe ¥ Se XVI. Auchenopora. 
b. Proximal shield of secondary aperture 
formed by the general- upward growth of 
the apertural bar and the backward growth 
of its median spine, the end (at least) of 
which fuses with the median line of the 
intraterminal front wall; apertural spines 
retain their identity and do not form, 
in the absence of ovicells, a complete 
PRIESTER io ratia stots cco =| spo jeiafese wlan) XVII. Pancheilopora. 
C. Erect, cylindrical. 
I. Intraterminal front wall not so completely 
fused ; ovicells with radial sculpture .... XVIII. Lekythoglena. 
If. Intraterminal front wall completely fused. XIX. Holostegopora. 
I. ANDRIOPORA, gen. Nov. 
Genotype. A. homunculus. 
Tabular Diagnoses of the Species. 
A. Apertural spines not markedly thickened. 
I, Apertural bar not produced vertically nor much 
compressed in a vertical plane. 
a. Costal fusions less perfect ; costee about 16. 
1. Shorter; apertural bar not very wide. 
«. Caude short or none; capitula rounded. 1. A. brevis. 
8. Caude longer; capitulanotso rounded. 2. A. méckleri. 
2. Longer; apertural bar very wide; caudz 
shorter ; capitula long and narrow...... 3. A. arion. 
b. Costal fusions more perfect ; a tendency to 
solid spines at median area of fusion; cost 
PE 8) Meese a ay ploy aie stay ates 2.6 as. 4"6: woe eee 4. A. gallica. 
proximal] apertura] shield. 
a. Apertural bar much flattened in a vertical 
26* 
