Reports and Proceedings — Geological Society of London 233 



In the work before us 662 genera are enumerated, containing 

 1534 species recognized as well founded, and 54 not specifically 

 determined. The figures quoted show that about 800 new forms 

 have been added to our extinct Vertebrate fauna since 1854; a 

 fairly large number, having regard to the comparatively small area 

 of the British Isles. But these new species only represent a portion 

 of the large number actually described in the interval ; for many, 

 as a result of subsequent examination, or the acquisition of new 

 evidence either by their authors or other paleontologists, have been 

 incorporated with species previously established. The voluminous 

 and valuable descriptive literature relating to them is distributed in 

 many works specially devoted to the subject ; Transactions and 

 Journals of numerous scientific societies — metropolitan and pro- 

 vincial — and publications devoted to science, that it is difficult 

 without the assistance of a system of comprehensive reference, such 

 as the writers of this Catalogue have produced, to realize how 

 extensive it is. 



To have rendered their work absolutely complete as one of ready 

 reference, the authors should have inserted a list of Families with 

 the genera appertaining to each. A list of this description would 

 be of immense service to many curators of provincial museums, and 

 also to others having a general knowledge of one or more of its 

 classes. So many revisions of the earlier — and also of some of the 

 later — families and genera have been made by specialists, that with- 

 out a library containing all recent memoirs relating to the subject at 

 hand, it becomes difficult to ascertain their systematic position. 



It is with reluctance we direct attention to this omission — 

 probably an oversight — but it can be easily rectified in a future 

 edition ; and will add still further value to this already most valuable 

 work. 



IR.IEIE'OIR-TS J^JSTJD PBOCEEDIUGJ 



Geological Society of London. 



March 26. 1890.— J. W. Hulke, Esq., F.R.S., Vice-President, in 

 the Chair. — The following communications were read : — 



1. " On a new Species of Cyphaspis from the Carboniferous Bocks 

 of Yorkshire." By Miss Coignou, Cambridge. Communicated by 

 Professor T. McK. Hughes, M.A., F.R.S., F.G.S. 



The author describes a fairly perfect head of a Trilobite found in 

 the Pendleside limestone of Butterhaw, near Cracoe, which appears 

 to belong to the genus Cyphaspis, though it differs from the typical 

 species of that genus in possessing two pairs of glabellar lobes. The 

 name Cyphaspis is proposed for this form. 



2. " On Composite Spherulites in Obsidian from Hot Springs, 

 near Little Lake, California." By Frank Butley, Esq., F.G.S. , 

 Lecturer on Mineralogy in the Royal School of Mines. 



The spherulites which form the subject of the present communica- 

 tion have been previously noticed, and it was then suggested that a 



