100. 
101. 
103. 
104. 
106. 
106. 
107. 
BIBLIOGRAPHY. 19 
1868 Biasny, J. J. Thesaurus Siluricus. 
Under Amorphozoa a list of 119 species is given, but about 70 of these 
may be definitely excluded from Sponges, and many others are undetermined 
or doubtful forms. 
1868 Lanxester, EH. Ray. On the Discovery of the Remains of Cephalaspi- 
dian Fishes in Devonshire and Cornwall; and on the Identity of 
Steganodictyum, M‘Coy, with Genera of those Fishes (Quart. Journ. 
Geol. Soc., vol. 24, p. 546). 
Records that Mr. Salter determined that M‘Coy’s supposed Sponges, placed 
under Steganodictywm, are actually the cephalic plates of Pteraspidian fishes. 
Confirms this determination, and places the Steganodictywm cornubicum, M‘Coy, 
under Scaphaspis, and S. Carteri, M‘Coy, as allied to Cephalaspis. 
. 1868 Merk and Wortuen. Paleontology of Illinois, vol. 3. 
Species of Receptaculites and Astr@ospongia are described and figured. 
1869 Traurscnorp, H. Palaeontologischer Nachtrag (Bull. de la Soc. Imp. 
des Natwralistes de Moscou, p. 230, Pl. il). 
Describes under the name of Siderospongia sirenis a platter-shaped body 
whose surface is covered with star-like canals. The nature of the organism is 
very doubtful. 
1869 Bownrzank, J. 8. Monograph of the Siliceo-fibrous Sponges (Proc. 
Zool. Soc.). 
Describes, amongst others, Purisiphonia as a new genus intermediate 
between Dactylocalyx and Farrea (p. 342). The only species, P. Clarkei, is 
probably from the Cretaceous strata of Queensland, 
1870 Romer, Ferp. Geologie von Oberschlesien. 
Numerous siliceous Sponges are referred to and figured ; for the most part 
they belong to species already known. 
1870 Parrirt, HE. Fossil Sponge Spicules in the Greensand of Haldon and 
Blackdown (Transact. Devon. Assoc., vol. iv, pp. 138—144, 1 Pl.). 
Detached spicules, resulting from the disintegration of tetractinellid and 
hthistid Sponges, are described and figured, and they are compared with the 
spicules of existing Sponges. 
1870 Coun, F. Ueber das Vorkommen von Kieselschwammnadeln in einem 
dichten grauen Kalkstein (Jahresb. Schlesch. Gesell., vol. xlviii, 
pp. 63, 64). 
Records the occurrence of hexactinellid and lithistid spicules from a well- 
boring at Inowraclaw. The rock is believed to be of Cretaceous age. 
