BIBLIOGRAPHY. 19 



100. 1868 Bigsby, 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. 



101. 1868 Lankestee, E. 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 Steganodictyum, are actually the cephalic plates of Pteraspidian fishes. 



Confirms this determination, and places the Steganodictyum cornubicum, M'Coy, 



under Scaphaspis, and S. Carteri, M'Coy, as allied to Gephalaspis. 



102. 1868 Meek and "Worthen. Palaeontology of Illinois, vol. 3. 



Species of Beceptaculites and Astraospongia are described and figured. 



103. 1869 Trautschold, H. Palaeontologischer Nachtrag (Bull, de la Soc. Imp. 



des Naturalistes de Moscou, p. 230, PI. i). 

 Describes under the name of Siderospongia sircnis a platter-shaped body 

 whose surface is covered with star-like canals. The nature of the organism is 

 very doubtful. 



104. 1869 Bowerbank, J. S. 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. Clarlcei, is 

 probably from the Cretaceous strata of Queensland. 



105. 1870 Roemer, Ferd. Geologie von Oberschlesien. 



Numerous siliceous Sponges are referred to and figured ; for the most part 

 they belong to species already known. 



106. 1870 Parfitt, E. Fossil Sponge Spicules in the Greensand of Haldon and 



Blackdown (Transact. Devon. Assoc, vol. iv, pp. 138 — 144, 1 PI.). 

 Detached spicules, resulting from the disintegration of tetractinellid and 

 lithistid Sponges, are described and figured, and they are compared with the 

 spicules of existing Sponges. 



107. 1870 Cohn, F. Ueber das Vorkommen von Kieselschwammnadem 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. 



