92 Mr. W. D. Lang—Revision of the 
1. A. specus, sp. 0. 
Type-specimen. British Museum, D. 15362; mucronatus- 
zone; Riigen. 
2. A. spelunca, sp. n. 
Type-specimen. British Museum, D. 14972; mucronatus- 
zone; Riigen. ; 
3. A. cavernosa, sp. 0. 
Type-specimen. British Museum, D. 15438; mucronatus- 
zone; Riigen. 
4. A. lunaris, sp. n. 
Type-specimen. In the collection of M. Canu (a_photo- 
graph of type-specimen in British Museum) ; Campanian ; 
Meudon. 
e. Pywreroporin®, subfam. nov. 
PNICTOPORA, gen. nov. 
Genotype. P. sujfocata. 
Tabular Diagnoses of the Species. 
A. Secondary tissue like bark, but not very 
rugose. 
1. Secondary tissue well developed, but not 
enough to swamp the avicularia to a great 
extent. 
@. IACresing cr. cp ene aan ch see ote 1. P. alligata. 
b.wHirech cylindrical 07 anos ccc rr sea 2. P. suffocata, 
2. Secondary ‘tissue more developed, so that 
even the avicularia tend to be swamped.. 3. P. strangulata, 
B. Secondary tissue very rugose ............0. 4. P. obstructa. 
1. P. alligata, sp. n. 
Type-specimen. British Museum, D. 8283 ; coranguinum- 
zone ; Gillingham, Kent. 
2. P. suffocata, sp. n. 
Type-specimen. British Museum, D. 28525 ; cortestudina- 
rvium-zone; Luton, Kent. 
3. P. strangulata, sp. n. 
Type-specimen. British Museum, D. 21180; coranguinum- 
zone; Span Hill, Oxon. 
