NEW GENERA AND SPECIES OP FOSSIL SPONGES. SpOUg. 11 
(g. n.) pisiforme, Myrmecium depressum , from the Great Oolite of 
Hampton Down, and Peronclla metabronnii , from the Inferior Oolite of 
Burton Bradstock. 
Lithistid^;. 
Platychonia elegans , Sollas, (42) from Inferior Oolite, Burton Brad- 
stock, and Polyrrhizophorajurassica , Link, (38) from the Malm, Sontheim, 
Schwabia, are Rhizomorina. Didymosphara steinmanni, Link, (38) from 
- same locality, is an Anomocladina. 
HeXACTI NELLI DA. 
Pocta (39) describes Cralicularia radicosa, C. grandis, C. explanata, 
C. parva, C. vulgata, C. rnirabilis , G. zitteli, Leptophragma exilis , L. cauli- 
formis [-me], L. scyphus, Petalope (g. n.) auriformis , P. foveata, Synau- 
lia (g. n.) germinata , S. patina for mis \_-nif-~\, Lopanclla (g. n.) depressa, 
Botroclonium (g. n.) arborescens , B. celatum : Ventriculites Jcorytzanensis, 
V. inolescens , Plocoscyphia insignis, Cyrtobolia (g. n.) morchella , Gcelopty- 
chium frici, from the Cretaceous formation of Bohemia. 
Sollas (42) describes Emploca (g. n.) ovata, Mastodictyum (g. n.) 
whidborni, Leptophragma fragilis , Plectospyris (g. n.) elegans , P. major , 
Calathiscus (g. n.) variolatus, from the Inferior Oolite of Burton Brad- 
stock. 
Barrois (33) describes Dictyophyton morini , from the Psammites du 
Chondroz at Jumont, = Upper Devonian of the Ardennes. Another 
species from same locality is identified with D. tuberosum , Conrad. The 
wide distribution of Dictyophyton during the Chenning Epoch is in 
striking illustration of the great uniformity which characterized the 
faunae of Palaeozoic times. 
Miscellaneous. 
Carter (6) describes the occurrence of spicules of fresh- water Sponges 
in the alluvium of the Altmuhl Valley, Bavaria. 
Sollas (43) describes the presence of spicules of marine Sponges in 
the alluvium of the Severn and its estuaries ; similar spicules are at pre- 
sent carried by tidal currents from the sides of the Bristol Channel 
(Ilfracombe and Swansea) up the Severn estuary past Gloucester. ' 
Spicules of marine Sponges also occur in the mud of the Thames at 
London Bridge. 
D 4 
1883. [vol. xx.] 
