3 io 



ADDITIONS TO THE LIBRARY. 



Sottas, W. J.. On Stauronema, a new Genus of fossil Hexactinellid 

 Sponges, with a Description of its two Species, S. Carteri and 

 S. lobata. 8vo. London, 1877. 



. On the Changes produced in the Siliceous Skeletons of cer- 

 tain Sponges by the Action of Caustic Potash. 8vo. London, 

 1877. 



. On the Perforate Character of the Genus Webbina, with a 



Notice of two new Species, W. Icevis and W. tuberculata, from the 

 Cambridge Greensand. 8vo. London, 1877. 



■ . On the Structure and Affinities of the Genus Siphonia. 8vo. 



London, 1877. 



. On the Structure and Affinities of the Genus Catagma. 8vo. 



London, 1878. 



. On two new and remarkable Species of Gliona. 8vo. London, 



1878. 



. Observations on Dactylocalyx pumiceus (Stutchbury), with 



a Description of a new Variety, Dactylocalyx Stutchburyi. 8vo. 

 London, 1879. 



. On Plectronella papilloma, a new Genus and Species of Echi- 



nonematous Sponge. 8vo. London, 1879. 



. On Plocamia plena, a new Species of Echinonematous Sponge. 



8vo. London, 1879. 



. On some Three-toed Footprints from the Triassic Conglo- 

 merate of South Wales. 8vo. London, 1879. 



. On the Silurian District of Phymney and Pen-y-lan, Cardiff. 



8vo. London, 1879. 



. . On some Eskimos' Bone-Implements from the East Coast 



of Greenland. 8vo. London, 1880. 



. On the Flint Nodules of the Trimmingham Chalk. 8vo. 



London, 1880. 



. On the Structure and Affinities of the Genus Protospongia 



(Salter). 8vo. London, 1880. 



. The Sponge-fauna of Norway : a Peport on the Pev. A. M« 



Norman's Collection of Sponges from the Norwegian Coast. 8vo. 

 London, 1880. 



Sottas, W. J., and A. J. Jukes-Brown. On the included Pock-frag- 

 ments of the Cambridge Upper Greensand. 8vo. London, 1873 



South Australia. Public Works Peport. Peport from the Public. 



Works Department for the Half Year ended 30th June, 1878. 4to. 



Adelaide, 1879. Presented by the Colonial Government. 

 Spain. Comision del mapa geologico de Espana. Boletin. Tomo VII- 



Cuaderno 1 & 2. 8vo. Madrid, 1880. 



Spencer, J. W. Discovery of the Preglacial Outlet of the Basin of 



