HOLOTHURIAN PLATES, 



71 



Fig. 2. — Eyes of Ljjcosa andrenivora. 

 ,, 3.— ,, Agelena Hyndmanii. 

 ,, 4. — ,, Walckeaaer a acuminata ^. 

 ,, 5.— ,, Dysdera Homhergii. 

 ,, G. — ,, Scytodes thoracica. 

 ,, 7. — Profile viev>' of Atypus Sulzeri $ . 

 ,, 8. — Falces and ceplialothorax of Tetragnatha extensa ^ , 



viewed from beneath. 

 ,, 9. — Male Palpus of Atypus Sulzeri. 

 ,,10. — ,, of Salticus scenicus. 



,, 11. — Palpus of Epeira diadema ^, underside. 



(To be CO nil fined.) 



Ibolotbuiiau platen from tbe Carboniferoua 

 Strata of tbe W.^Bt of Scotland, 



By J. Smith. 



Fio-. 10. 



Fm, 11. 



Fi^. 12. 



IN Messrs. Armstrong, Young, and Robertson's " Catalogue of 

 the Western Scottish Fossils," under the head of " Echino- 

 dermata/' on page 41, occurs the following note: — ''In 

 washing the limestone-shales from one or two localities (not 

 given), small, microscopic, perforated, wheel-like organisms have 

 been found, that are, provisionally, referred by Mr. R. Ethridge, 

 jun., to the Holothuridse." In examining under the microscope a 

 quantity of the washed shale from Orchard Quarry, near Glasgow, 

 I found a considerable number of " perforated, wheel-like organ- 

 isms," v/hich, I beUeve, are identical with those mentioned in the 

 foregoing quotation. 'I'hese little organisms measure about one 



