87. 
88. 
SWE 
90. 
oN. 
92. 
BIBLIOGRAPHY. ily 
like tissue, and it is likewise composed of spicules. Thus, whilst hexactinellid 
Sponges are, for the most part, by themselves, lithistid and calcisponges 
are united into one group. Numerous species are described and figured, but 
the characters given are very brief and inadequate for satisfactory recognition. 
. 1864 Satrer, J. W. On some new Fossils from the Lingula Flags of Wales 
(Quart. Jour. Geol. Soc., vol. xx, p. 238, Pl. XIII). 
Describes, as a new genus and species, Protospongia fenestrata, from Mene- 
vian strata. It is stated to possess a reticulate skeleton of large cruciform 
spicula. 
1864 Fromenret, E. pe. Polypiers Coralliens des Environs de Gray (Mém. 
de la Soc. Linn. de Norm., vol. xiii). 
Various species of calcisponges are figured on Pl. xv. 
1865 Bitnines, HE. Palaxozoic Fossils, vol. i (Geological Survey of Canada). 
An elaborate description is given of the characters of the genus Recepta- 
culites, which is regarded as probably a Sponge. The spicules are compared 
with the birotulate forms in the gemmules of the freshwater Spongilla. 
Archeocyathus, Calathium, and Eospongia are also described provisionally as 
Sponges. 
1865 De Ferry. Note sur les Crustacés et les Spongitaires de la base de 
l’étage Bathonien des environs de Macon (Bull. de la Soc. Linn. 
de Normandie (Caen), vol. ix, pp. 865—375). 
Silicified bodies of irregular form are referred to the genera Siphonocelia 
and Discelia. Their affinities appear to be very doubtful. 
1865 Lauze, G. C. Die Fauna der Schichten von St. Cassian (Denkschrift 
d. k. Akad. d. Wiss. Wien, Bd. 24. 
Numerous species of calcisponges are described, but no information is 
given respecting their skeletal structures. 
1865 Tarr, R. On the Correlation of the Cretaceous Formations of the 
North-East of Ireland (Quart. Journ. Geol. Soc., vol. xxi, p. 43, 
Pl. VY). 
Two new genera of hexactinellid Sponges are proposed, Htheridgia and 
Celoscyphia; and two species of Celoptychium are regarded as new forms. 
1866 Mackiz, 8. J. An Illustrated Catalogue of British Fossil Sponges, Part 
II, pp. 1—32, Pls. I—IV. 
Only the second part of this extraordinary work appeared. It consists of 
numerous extracts from the writings of Mantell, Toulmin Smith, and other 
authors on fossil Sponges, mingled with desultory remarks of the author him- 
self. None of the figures on the four plates appears to be original. 
co) 
