380 Reports and Proceedings — Linnean Society 



A complete analysis of the rock is given, which bears out the 

 petrographical evidence that it is a very basic lamprophyre belonging 

 to the monchiquite group. It is compared with other rocks of the 

 group, and in particular with the monchiquites and camptonites of 

 Colonsay, with which it has many points in common. Finally, its 

 age and possible connexion with the only other known intrusion into 

 the Old lied Sandstone of the South Wales area — that of Bartestree, 

 near Hereford — are referred to. 



2. "Notes on the Culm of South Devon: Part I — Exeter District." 

 By Frederick George Collins, F.G.S. ; with a Report on the Plant- 

 remains by E. A. Newell Arber, M.A., F.G.S., and Notes on the 

 Cephalopoda, by George C. Crick, Assoc. R.S.M., F.G.S. 



The object of this paper is to show that the fauna of the Culm 

 Measures of South Devon proves these beds to be the equivalents 

 of the Pendleside Series of the Midlands, as has been shown by 

 Dr. Wheelton Hind to be the case with the Culm Measures of North 

 Devon. The area from which these fossils have come may be roughly 

 described as a narrow strip of country 17 miles long, running from 

 south-west to north-east, having the city of Exeter as its centre. 

 The work has extended over ten years, and innumerable sections have 

 been examined without result. The actual fossiliferous localities are 

 eighteen in number, but often the fossils are too poor for determination. 

 Plant-remains are abundant, but determinable specimens very rare ; 

 the preservation of the fragments is often excellent, although the 

 fragments themselves are insufficient for specific determination. Such 

 fossils as have been determined show a sequence from below upwards 

 as we go from south to north ; but it seems advisable to seek more 

 evidence, and an attempt will be made by working due north from 

 Waddon Barton, a point farther to the west, when, if the attempt is 

 successful, another communication will be offered to the Society. 



II. — Linnean Society. 

 June 1, 1911.— Dr. D. H. Scott, F.R.S., President, in the Chair. 



Dr. A. Smith Woodward, F.B.S., read a paper on "The Fauna of 

 the Carboniferous Period, so far as it has been discovered in the same 

 deposits as the Carboniferous flora". 



The fauna agrees with the flora in consisting, for the most part, of 

 highly specialized representatives of the lower groups, but is singularly 

 modern in some respects. Some of the freshwater and land mollusca 

 are scarcely distinguishable from genera still existing. All the 

 Crustaceans are of primitive groups, and some of the most interesting 

 are related to Anaspides, which still survives in Tasmania. The 

 myriapods, scorpions, and spiders are similar to those of later date, 

 but a few of the scorpions retain obvious remnants of the characters 

 of their aquatic ancestors. Limuloids also occur. Insects are numerous, 

 but all belong to the lower groups in which there is no complete 

 metamorphosis, and there are many generalized types which can 

 scarcely be referred to existing orders. Cockroaches are numerous, 

 but have transparent fore- wings. Primitive dragon-flies occur, and 

 some of these are the largest known insects, with a span of wings 



