Reports and Proceedings — Geological Society of London. 91 



Dr. Stolterfotk follows with an account of his work at " Sur- 

 face Dredging in the Dee." This paper is especially interesting 

 to microscopists, as it deals entirely with diatoms and the lower 

 forms of animal life, and shows how very abundant are the lower 

 forms of life in the estuary of the Dee. Then four papers by 

 Mr. G. W. Shrubsole. The first a note on the Polyzoon, " Glanco- 

 nome disticha, from the Bala beds of Glyn Ceiriog." In this paper 

 Mr. Shrubsole describes a new genus of Polyzoon, which for some 

 time has been regarded as identical with Glauconome disticha from 

 the Dudley beds. The new name proposed is Pinnatopora Sedgwichii. 

 There is a list of land and freshwater shells compiled by Mr. 

 Shrubsole " from local collections sent in from time to time at 

 the annual conversaziones." It consists of 93 species and 19 varieties, 

 and is followed by a few interesting remarks. A paper " On the 

 Occurrence of Galcisphcera (Williamson) in the Mountain Limestone 

 of the Eglwyseg rocks, near Llangollen," by Mr. Shrubsole, follows 

 next. In this paper Mr. Shrubsole has brought together in a clear 

 and concise manner all that is known about these curious fossil 

 Rhizopods, about which there has been so much dispute as to whether 

 we should classify them with the Foraminifera in virtue of the 

 calcareous material of which their remains are composed, or with 

 the Eadiolaria in virtue of their minute structure. There is also a 

 brief note by Mr. Shrubsole on the occurrence of Venus mercenaria. 

 Then follows a paper, by Mr. Ruddy — " A List of Caradoc or Bala 

 Fossils, found in the Neighbourhood of Bala, Corwen, and Glyn 

 Ceiriog " — one of the most valuable in this number of the Pro- 

 ceedings, giving evidence of years of patient work, and which no 

 one who wishes to work at the Bala beds can possibly afford to be 

 without. The last paper is a botanical one by Mr. J. D. Siddall, on 

 " The American Water- weed, Anacharis alsinastrum, Bab.," illustrated 

 by a carefully drawn plate. 



EBPOETS .A-ZCsTX) IPIROOiEIEIDIlsrG-S. 



Geological Society of London. 



I. — Dec. 16, 1885. — W. Carruthers, Esq., Vice-President, in the 

 Chair. — The following communications were read : — 



1. "Old Sea-beaches at Teignmouth, Devon." By G. Wareing 

 Ormerod, Esq., M.A., F.G.S. 



The author stated that while old records show that no important 

 changes have taken place in the level of the Teignmouth district 

 during the historical period, the excavations made in recent drainage- 

 operations in the present year showed the existence of at least two 

 series of beaches. The oldest sea-beach, which is a few feet above 

 the present sea-level, was partly washed away and then covered up 

 by later deposits exhibiting evidence, in a number of delicate bivalve 

 shells in an unbroken condition, of having been deposited in a calm sea. 



2. " On the Gabbros, Dolerites, and Basalts of Tertiary Age in 

 Scotland and Ireland." By Prof. John W. Judd, F.R.S., Sec.G.S. 



