84 Mr. W. D. Lang—Revision of the 
C. Coste stout, with a lateral row of pelmata 
and a median row of pelmatidia ........ g. Diacanthoporine. 
D. Coste stout, with one or more series of 
pelmata ....cecicceec esse enenenceerens h. Pelmatoporine. 
a. Francoporrw2, subfam. nov. 
Tabular Diagnoses of Genera and Species. 
A. Pelmatidia sometimes visible; intraterminal 
front wall arched and not sunk in secondary 
PiBsle isso. SEIU AE Sg ieee nae I. Francopora. 
B. Pelmatidia quite obliterated by secondary 
tissue in the median area of fusion; cecia 
tend to be immersed in secondary intercecial 
PIBSG ese eee Matsa tie oe ese eee een se Re Se II. Baptopora. 
a. Smaller, about 3 mm.; secondary aperture 
proximally formed by a process of the 
apertural bar which probably fuses with 
the proximal pair of apertural spines to 
form hoop-like structures ............+- 1. B. immersa. 
6. Larger, more than 3 mm. ; secondary aperture 
proximally complete, probably formed as 
in (@), but with the “ hoops” infilled with 
Secondary Hissut. it oo esc ee = 2. B. insignis. 
I, Francopora, gen. nov. 
Species. Francopora canui; Senonian [Coniacian] ; Fé- 
camp, N.E. of Le Havre, France. 
Type-specimen. In the collection of F. Canu [a photograph 
of type-specimen in the British Museum |. 
II. Bapropora, gen. nov. 
Genotype. B. immersa. 
1. B. ummersa, sp. n. 
Type-specimen. British Museum, D. 28419; Coniacian ; 
Yours, France. 
2. B. [Escharipora] insignis (d’Orbigny), Pal. France. 1851, 
pl. 687. figs. 1-3, 1852, p. 231 ; Senonian [Santonian ]; 
France. 
b. OpvisrHORNITHOPORINZ. 
OPISTHORNITHOPORA, gen. NOV. 
Species. O. | Reptescharella] flabellata (d’Orbigny), Pal. 
Franc. 1852, pl. 716. figs. 9-12, 1853, p. 469 ; Senonian ; 
France. Interpreted according to M. Canu’s identification 
of a specimen in his collection. 
