43 



]at. 55"' 30', and long. 122°; 1877, Dr. G. M. Dawson, Wlnpsaw Creek, 

 Similkanieen Pdvev, B.C. and "Nicola Series," Lake Nicola, B.C.; 187S 

 Dr. G. M. Dawson; Q\ieen Charlotte Islands, several localities; 1887, 

 Mr. K. G. McConnell, Liard River, lat. 59=* 16' and long. 125° 35'. 



The publication is timely and valuable, and the plates which are to 

 accompany the text, prepared by Mr. L. M. Larnbe, are all ready, and 

 will be issued shortly in conjunction with part 2 on "Fossils of the 

 Hamilton Formation of Ontario," by the same author. 



H. M. A. 



On Arch^ocyathus, Billings, and on Other Genera, Allied to 

 OR Associated with it, from the Cambrian Strata of North 

 America, Spain, Sardinia and Scotland. — By Dr. George 

 Jennings Hinde, F.G.S., &c., &c. 



Quarterly Journal of the Geological Society of London. Vol. 

 XLY, Part f. No. 177. P. 125, et seq. This paper is the result of 

 an exhaustive and critical study of the genus Archceocyathus, described 

 by Mr. Billings in 18G1 from the Potsdam limestone of L'Anse au 

 Loup, Labrador, and giving its history as well as that of the allied 

 genera Ethmophyllum, Meek, Archceocyathellus, Ford^ Protocyathus, 

 Ford, Protopharetra, Bornemann, Coscinocyathus, B. and AntJtomorpha, 

 B. Then follows an interesting chapter on the " Mineral nature of 

 Archseocyathus, and its allies," after which their " mode of growth and 

 structure " are fully described — the descriptions of Billings, Meek and 

 Bornemann having been amended by the undoubtedly ablest authority 

 on fossil sponges, so that their true nature and affinities are now 

 revealed. The new genus Spirocyathus has also been created by Dr. 

 Hinde, to receive Billings' A. Atlanticus. 



Regarding the affinities of the Archseocyathina3, Dr. Hinde holds 

 the view that they " belong to a special family of the Zoantharia 

 sclerodermata (corals) with near relationship (leaving Anthomorpha cut of 

 account) to the " Perforata." 



Dr. Hinde then describes two new Genera : Archnceoscyphia, 

 (which is proposed to include ArchceocycuJms Mingcmensis, Billings) and 

 yipterella, to include Calaihium ? paradoxicum, Billings, followed by a 

 dissertation on Trichospongia, Billings. Archcsocyatlncs is thus considered 

 to belong to the special family Zoantharia sclerodermata, Archoioscy- 

 plda, is shown to be a lithistid sponge; Nipterella, n.g., the same, and 

 the genera Calaihium and Trichospongia, to be undoubted siliceous 

 sponges. 



A double page plate (Plate V.), of illustrations of the Cambrian 

 Archfeocyathinae and sponges accompany the text and shew the micro- 

 scopic as well a!3 macroscopic characters of the species represented. 



H. M. A. 



