102 PROCEEDINGS OF THE 



them unclescribed, were occasionally found attached to the stems 

 of crinoids, corals, and shells, but in general they were rare in the 

 limestone series of our coal measures. Two of the species, how- 

 ever, to which he called the attention of the meeting, are much 

 more abundant in our upper coal measures, viz., Spirorbis carbon- 

 arius and S. helicteres. Of the former, he exhibited upwards of 

 300 specimens attached to the stem of a coal plant from Airdrie 

 coalfield, the portion of the plant being four inches in length by 

 one inch in breadth. The latter species had not been recognised 

 from this district before, and Mr Young stated that they occur 

 in great abundance, along with shells of the genus Anthracosia, 

 forming a thin mussel band at Newton, near Cambuslang. The 

 large entomostracan which he exhibited belongs to the genus 

 Cypridina, a rare form in our strata. From one fish coprolite, 

 obtained by a friend from strata near Carluke, he had extracted 

 upwards of 300 specimens of the shells, most of which were in a 

 fine state of preservation, showing that many of our carboniferous 

 fishes must have preyed largely upon these minute crustaceans. 



Mr Colin Brovni exhibited the lower jaw of an undescribed species 

 of coal reptile, from one of the Airdrie blackband ironstones. This 

 fine specimen was obtained about twelve years ago, but was 

 thought to belong to a fish. The discovery, however, of undoubted 

 reptilian remains in the same district within the last two years, 

 has thrown much light on the specimen, which appears to be 

 different from any that has yet been found. This jaw measures 

 about nine inches in length, and has a closely set row of formid- 

 able curved teeth, seventeen i)i number, showing in their structure 

 the same labryinthic character in the teeth of the genus Anthroco- 

 saurus, to which it is apparently very closely allied. 



Mr Thomas Chapman exhibited a number of liAdng specimens 

 of a new species of A cams found in the young flower buds of the 

 black currant (Naples variety), and forwarded to him by Mr David 

 Doig, Hafton, near Dunoon. Mr Doig had about twelve months 

 ago submitted specimens of diseased buds to Mr David Bowman, 

 through whose microscopic researches the existence of the Acarus 

 was first made known. 



Mr Chapman read a communication from Mr Doig, in which he 

 stated that, although he had observed the effects of this so-called 

 disease about thirteen years ago, he was unable to refer it to its true 

 cause until Mr Bowman made his discovery. He likewise 



