Titles of Papers read in Section C. at the British Association. 455 



compared ; in the London slab they measure 2-5 cm. and 2-9 cm. ; 

 in the Berlin slab 1-7 and 2-8, but the longest Berlin digit is 4-3 cm. ; 

 so that notwithstanding its smaller size the Berlin animal appears to 

 have had digits as long as the London specimen. The Berlin scapula 

 measures 4 cm. and may be imperfect ; the London scapula is 

 4-2 cm. The London ilium is 4-3 cm. long, in the Bei'lin slab it 

 does not appear to exceed 3 cm. The ribs appear to be longer in the 

 Berlin slab, some measuring 4-8 cm., while the longest in the London 

 slab is 3-7 cm. 



The Berlin tail measures 16'5 cm., and appears to include 21 

 vertebrae ; the London tail measures 20*8 cm., and appears to include 

 23 vertebras, of which the first 9 have transverse processes. The 

 London animal probably had 5 sacral and 8 dorsal vertebrae, with a 

 length of 8-0 cm., though number and length are uncertain. In the 

 Berlin animal the length of this region is 8 "5 cm. Vogt counts 10 

 in the back. The neck is imp)erfect in the London slab, the vertebras 

 lie in curve, five at least are preserved ; a centrum measures 1 cm. 

 In the Berlin slab the neck measures about 6'8 cm. Vogt estimates 

 8 vertebrae, but there are probably more. The head of the London 

 animal as preserved measures 4 cm. in length ; the Berlin head to 

 the occipital articulation is 4*7 cm., and to the limit of the occipital 

 crest about 6-1 cm. These differences are supported by details in the 

 forms of the bones, which also prove the species to be distinct. 



isroTiGiBS oip Jy^E!lv^OI:E^s. 



I. — British Association for the Advancement of Science, 



Fifty-First Meeting, 31st August, 1881. 



[Sir John Lubbock, Bart., M.P., D.C.L., LL.D., F.E.S., etc., Fresident.'] 



1. — Titles of Papers Eead in Section C. (Geology). 



President: Professor A. C. Eamsay, LL.D., F.R.S., etc. 



Address by the President. (See p. 459.) 



Prof. E. JBJull, LL.D., F.B.S. — On the Laurentian Beds of Donegal 



and of other parts of Ireland. 

 G. H. Kinahan, M.R.LA. — On the Laurentian Rocks of Ireland.^ 

 C. Moore, F.G.S. — Life in Irish and other Laurentian Eocks. 

 A. B. Sunt, M.A., F.G.S. — On the Occurrence of Granite in situ 



about 20 miles S.W. of the Eddystone. 

 Professor J. Prestioich, M.A., F.R.S. — Some observations on the 



causes of Volcanic Action. 

 Professor W. J. Sollas, M.A., F.G.S. — The connexion between the 



Intrusion of Volcanic Rocks and Volcanic Eruptions. 

 Baldwin Latham, M. List. C.E., F.G.S. — On the Influence of Baro- 

 metric Pressui'e on the Discharge of Water from Springs. 

 J. E. Clarh, B.Sc. — Glacial Sections at York. 

 G. W. Lamplugh. — On the Bridlington and Dimlington Glacial Shell 



Bed. 

 J. B. Mortimer. — On Sections of the Drift obtained by the new 

 drainage works of Driffield. 



1 See Geol. Mag. Sept. p. 427. 



