170 PROCEEDINGS OF THE 



genera, as well as many of the larger turbinated corals found 

 in our limestone strata, had been free organisms, and had 

 grown in the sediments in which they are now entombed without 

 any visible mode of attachment, being possibly supported by 

 the surrounding mud in an upright position. Only in a few 

 rare instances have any of the larger turbinated corals been 

 found with marks of attachment, and these were seen to have 

 been in the younger state ; these, therefore, differ from the 

 adherent form of Cyathaxonia now exhibited, in this respect, 

 that the latter is not known to have had a free existence in 

 any later stage of its history. 



PAPERS READ. 



I. — Notes on some Spiders collected in the West of Scotland in 1876. 



By Mr Henry C. Young. 



Very little has yet been done in collecting, or forming a 

 catalogue, of Scottish spiders, the only published local lists I know 

 of being those of Messrs Hardy in Berwickshire and Traill in 

 Aberdeenshire, while up to the present time there is no general 

 list of Scottish spiders published. The specimens I exhibit to- 

 night comprise 20 genera and 39 species, which form but a very 

 small proportion of the known British spiders. I hope, however, 

 to make considerable additions to this number from time to time, 

 as I am convinced that the district will produce a much greater 

 variety of species than those I have already taken, there being 

 many spiders common in other parts of Scotland which I have 

 not yet seen in the vicinity of Glasgow. 



The principal authority on the order in this country, the Rev. 

 O. P. Cambridge, has examined my specimens, and I have fol- 

 lowed the arrangement published by him in the Transactions of 

 the Linnaean Society. 



Harimctes Homhergii, Scopoli. — Of this species I took several 

 specimens at Arthur's Seat in May, but have not yet found it near 

 Glasgow. It is common in the North of England. 



Segestria senoculata, Linnaeus. — This species is very common in 

 the district, and seems to be generally distributed in Great Britain. 

 It is longer lived than most spiders, not attaining maturity for 

 two years. It passes the winter in a kind of silken tube under 

 stones, where it may be found at all times. 



