12 PERMIAN FOSSILS. 
existence of Halinidas or Sponges with siliceous spicula in the Greensand ;’ and 
lately, Mr. Lonsdale has described a genus (Conis, a granulo-calcareous Sponge) 
belonging to the order Leuwconida, from the same formation.” 
Genus Scyphia, Oken. 
Diagnosis.—“ Stirps affixa, cava, simplex vel subramosa, cylindracea, ore aperto, 
e fibris reticulatis.”* (Goldfuss.) 
This genus, which is typified by the recent Spongia fistularis, Esper, embraces Sponges 
“ with a reticulated tissue, and whose general form resembles a cylindrical or ex- 
panded tube, terminated by a large opening.”* Goldfuss has figured several Jurassic 
species. 
ScyPHIA TUBERCULATA, King. Plate I, figs. 1 and 2. 
ScyPHIa TUBERCULATA, King. Catalogue, p. 5, 1848. 
Diagnosis.—Form cylindrical. Surface tuberculated. With an axial excurrent 
canal, from which several smaller ones strike off to the surface; the superficial tubercles 
forming their apertures. 
This Sponge appears to be scarce. It occurs in the Shelly Limestone at Humbleton 
Hill and Dalton-le-Dale. 
Genus Mammillopora, Bronn. 
Lymnorea, Lamouroux. 
Diagnosis.—“ Masses mammillated, finely porous and reticulated, agglomerated 
within a common calciform, wrinkled, adherent base.’” 
This genus was originally proposed by Lamouroux, whose name Lymnorea being 
preoccupied, Bronn was led to replace it in his ‘ Pflanzenthiere’ and ‘ Lethzea’ by the 
one herein adopted. The above diagnosis, from the ‘ Penny Cyclopzedia,’ has been 
used in preference to the one in German given by this author. 
MAMMILLOPORA MAMMILLARIS, A7zvg. Plate II, figs. 3 and 4. 
MANON MAMMILLARIS, King. Catalogue, p. 5, 1848. 
Diagnosis.—Form mammillary polymorphous. Pores minute and polygonal. 
This Sponge has some resemblance to the Jurassic Mammuillopora protogea, Bronn 
1 Proceedings of the Geological Society of London, vol. iii, p. 280. 
2 Quarterly Journal of the Geological Society, vol. v, part i, pp. 63-6. 
3 Petrefacta, Heft i, p. 4. 
4 Milne Edwards, in Lamarck’s ‘ Animaux sans Vertébres,’ vol. ii, p. 578, 2d edition, 1836. 
> Penny Cyclopeedia, vol. xxii, p. 376. 
