286 report — 1865. 



"We have here a larger proportion of blind Trilobites, and those without 

 facial sutures, than in higher formations. Agnostus, Microdisms, and Erin- 

 nys are destitute of facial suture, and probably of eyes. HolocepTudina seems 

 to have been furnished with very minute eyes, so far out as nearly to be lost. 

 And Anopolenus, while it has immense eyes, has a most singular restriction 

 in the development of the free cheeks, and is in many respects abnormal. 



The Braehiopods are such as we were led to expect. Minute and almost 

 rudimentary forms of Lirigulce and Discince, with some kindred genera, form, 

 with Theca, the whole of the shells. The Sponge seems to be a peculiar form ; 

 yet not so different from the Silurian ones as at first supposed. The fibres are 

 very rudimentary in structure. The Cystidean is as yet imperfectly known. 



Perhaps the most curious point about this fauna is the greater resemblance 

 it bears to the Bohemian primordial group than is borne by any other 

 member of the Lingula-flag. Tbe Paradoxides which mark several distinct 

 horizons here, are not known in the Upper Lingula-flag. The species of 

 Conoeoryplie resemble Bohemian and Spanish types. Erinnys or Harpides 

 is like the Bohemian species. Holocepludina resembles Arionellus, &c. 



If from such scanty indications we may judge anything, it would be that 

 the Bohemian primordial group represents our Lower, and not our Upper 

 Lingula-flags. These last are rich in (Menus, a genus absent altogether from 

 Bohemia, but abundant in Northern Europe. It is accompanied, according 

 to Angelin, by Paradoxides in Sweden. But with us, the genera follow a 

 very regular order. Paradoxides appears first, Anopolenus second, and then 

 various species of Olenus last. 



Several of the forms above catalogued (Microdiscus, Erinnys, &c.) are 

 found in beds' of the same age near Ffestiniog in North Wales ; and the great 

 Paradoxides Davidis occurs in black slates on the same horizon at the gold- 

 mines of Dolgelly, North "Wales (see Decades, Geol. Survey, No. 11, PI. 10). 

 We have included in our list those species found in the uppermost grey beds 

 of the Lower Cambrian ; but all may for the present be included provisionally 

 in our ' Meneviaw group. 



Report of the Lunar Committee for Mapping the Surface of the Moon. 

 By W. R. Birt, at the request of the Committee, consisting of James 

 Glaisher, F.R.S., Lord Rosse, F.R.S., Sir John Herschel, Bart., 

 F.R.S., Professor Phillips, F.R.S., Warren de la Rue, F.R.S., 

 President of the Royal Astronomical Society, Dr. Lee, F.R.S., Rev. 

 W. R. Dawes, F.R.S., Rev. T. W. Webb, F.R.A.S., J. N. Lockyer, 

 F.R.A.S., H. S. Ellis, F.R.A.S., and W. R. Birt, F.R.A.S. 



The first object of the Committee appointed at Bath in the year 1864 was to 

 prepare forms suitable for the registration of lunar objects, for recording 

 original observations, for facilitating the formation of a catalogue, and for 

 computing the coordinates of the positions of objects. The results of the 

 labours of the Committee are now presented to the Association in the shape 

 of Form No. 1, for recording observations ; Form No. 2, for facilitating the 

 arrangement of objects in a catalogue ; Form No. 3, for recording the posi- 

 tions, extents, heights and depths, brightness and alignments of lunar objects, 

 with descriptions, synonyms and references to existing authorities ; and Form 

 No. 4, for computing positions of the second order. The annexed form is 

 that for recording general observations of the moon. 



