236 . Obituary — George Jennings Hinde. 



bead-like (often perforated) organisms from the Chalk, of which (aided 

 by Dr, Arthur llowe) he collected no fewer than 2,900 specimens. 

 After examination of their minute structure under the microscope he 

 showed them to belong to a group of Lithonine Calcisponges, of 

 which he described and figured six species (see Journ. Eoy. Micr. 

 Soc, 1903). 



By the investigation of chert rocks of Lower Palaeozoic age from 

 every part of the world Hinde demonstrated their geological impor- 

 tance and truly organic origin, built up of millions of microscopic 

 siliceous skeletons, often of exquisite forms, of E,adiolaria. He 

 devoted twentj' papers to their description : those from the Cherts of 

 the Dutch East Indies he collaborated with Dr. G. A. F. Molengraafl, 

 and those of Devon, Cornwall, and Somerset, with Mr. Howard Fox, 

 F.G.S., of Falmouth. 



Of the class Annelida, the naked wandering marine worms, 

 without hard parts (save very minute toothed jaws and spines), 

 were formerly known only by their tracks upon the Palaeozoic rocks ; 

 but jaws of Annelids were found by Hinde in Cambro-Silurian 

 formations in America, Britain, Sweden, etc., often mixed, as inthe 

 Ludlow "Bone-bed", with parts of various other microscopic 

 organisms, such as the teeth of cartilaginous fishes, Ifyxine, etc.). 

 Crustacean remains, etc. He separated many of these and figured 

 them, and also the Annelid jaws,^ for the first time since their 

 discovery by Dr. Pander in Russia in 1854.- 



In connexion with the Royal Society he communicated a paper 

 on "Beds of Sponge-remains in the Lower and Upper Greensand 

 Formation of the South of England", published in the Phil. Trans., 

 1886 (pp. 403-53). He also reported to the Royal Society's 

 Committee on Coral Reefs the result of his investigation of the 

 organisms obtained by him from the cores extracted from the 



^ The author determined seven genera of Annelids, and enumerated fifty-five 

 different forms. 



^ Professor Owen, Dr. Harley, and H. Woodward also drew attention to 

 them; see "Conodonts", Murchison's Siluria, 5th ed., 1872, pp. 134, 356, 

 542, 544. 



