232 
THE GEOLOGIST. 
CuERENT Classification of Fossil Sponges.— The followmg classi- 
fication, certainly very erroneous, appears to be, as nearly as may be, 
that which is current amongst British geologists. The Editor would 
be much obliged by communications as to proposed and necessary amend- 
ments. 
I. OcELLARIDiE. 
Coscinopora. 
Gucttardia. 
Ventriculites {Ocellaria). 
Bi-achi elites. 
Cephalites {Cribrospongia ; Tragos, Gold- 
fuss, non Schweg.). 
Coeloptychiura. 
Eetispongia. 
Tlialamospougia. 
Palseospongia. 
Porospongia. 
Goniospoiigia. 
Marginos])ongia. 
PIt'urospougia. 
Hemispoiigia. 
Yerrucospoiigia { = Manon). 
Sparsispougia (= Stromaiopora). 
Stellispougia. 
V. Amorphospongid^. 
Cupulospongia. 
Plocoscophia. 
Meaudrospongia. 
Amorphospongia {AcJnUeum) . 
Turonia. 
Strematopora. 
Spoiigia. 
VI. Halichondrid^. 
CWowd^ {Via a ; Entobia). 
Halichoudria. 
Tiioosa. 
Spongilla. 
Alcyoaella. 
Geodia. 
Tethya. 
G\-R\\\.\d!l^{Leucalia). 
Dunstervillia. 
ir. SiPHONID/E. 
Eudea {Scyphia). 
Perispougia. 
Camerospongia. 
Verticillites. 
Cnemidium. 
Siphonia {Tlalirrhoa ; Polypothecia). 
Ilippalimus {Scyphia). 
Choauites. 
Jerea (according to Morris). 
Paramoudra. 
III. LlCMNOREIDiE. 
Lymnorea. YII. CLiONiDiB. 
Tremospongia. Cliona. 
Leiospongia. Talpina. 
Actinospongia. 
Rhizospongia. 
Mammiilopora {Lymnorea). 
IV. SPARSISPONGlDyE. 
Chenendopora {Manon). 
Porospongia. 
Jerea (according to B'Orbigny). 
Intimations from collectors 
would also especially oblige. — S. J 
Coal-beds of the Nottingham Collieries. — Eadivood Colliery.-^- 
The coal is of excellent quality, free from dust, throwing out great heat 
durable and clean in burning, and said to be very superior for general 
household purposes. _ Watnall, Beauvale, and Brinsley Collieries.— The 
" Comb Coal," the highest workable seam, is 2 feet 6 inches thick, and is 
used for household purposes in the midland counties of England. It is a 
free and bright burning coal, leaving a small quantity of red ashes. East- 
wood and Co.manliay Collieries. — The deep soft coal is most extensively ■ 
worked for household purposes ; it is about 180 yards below the " top hard= 
VIII. Uncertain. 
Conis. 
Coscinopora. 
Steganodictyuin. 
Udotea. 
? Steganodictyum. 
Stromatopora. 
to the collections they have formed, 
M. 
