194 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Nov. 30, 



Nautilus. 

 *N. laevigatus.... 



N. Farringdonensis. 



DiADEMA. 



fD. dubium 



Salenia. 

 *S. punctata .. 



GONIOPYGUS. 



•J-G, peltatus, var. 



NUCLEOLITES. 

 *ClDARlS. 



CEPHALOPODA. 



d'Orb. Terr. Cret. t. 17; Sharpe, 

 Pal. Soc. t.2. f. 1. 



n. s. PI. VI. fig. 1. 



ECHINODERMATA. 

 Gras 



Agassiz 



Agassiz,MoD. des Salen.t.3. f.9-18; Neocomien. 



2 species. 



Plates and Spines of more than one species 



Upper & Lower 



Chalk. 

 Upper Green 



Sand. 



Lower Green 

 Sand. 



Lower Green 

 Sand. 



Passim. 

 France. 



Switzerland. 



Atherfield. 



Neufchatel. 



Notes on some of the Farringdon Fossils, and Descriptions of 

 some New Species of the Zoophytes and Molluscs. 



,■,» ■+frf.ri,Trr^fp Manon peziza. 



Goldfuss has described several different sponges under this name, 

 which do not all possess the distinctive character of the genus of 

 having the mouths of the canals circumscribed ; of these the sponges 

 (pi. 1. fig. 7 & 8) do not now concern us as they are not found at 

 Farringdon. The cup-shaped sponge (pi. 5. fig. 1) is very common 

 at Farringdon ; its inner surface is covered by a tolerably compact 

 integument Avithout distinct openings, and its outer surface consists 

 of loose spongy tissue, in which the canal openings are distinguished 

 by larger irregular openings. As this should not be called a Manon, 

 I have called it Spongia peziza ; in its structure it is closely allied 

 to the Spongia Trigeris. Its form is always a very regular cup. 

 Manon peziza, Goldf. pi. 29. f. 8, is a good Manon, with small, well- 

 defined round openings to the canals ; it is found either lobate and 

 spreading, or irregularly cup-shaped. 



Chenendopora fungiformis. 



Dr. Mantell has figured this species in the 'Wonders of Geology' 

 as found at Farringdon ; but his figure is obviously copied from 

 Blainville. Lamouroux's figure has a general resemblance to several 

 of the Farringdon sponges, but is not in sufficient detail for me to 

 identify it with either of them. j\Ir. Lonsdale is quoted in Mr. 

 Morris's Catalogue as the authority for its occurrence at Warminster. 

 The identification must remain in doubt till we can compare our 

 specimens with the original of Lamouroux, as his figure and descrip- 

 tion would apply equally well to several of the Farringdon sponges. 



