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PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [Dec. 14, 



coleopterous insect ; but a careful microscopic examination of the 

 specimens convinces me that it is a chilognathous Myriapod, allied 

 to lulus. It may be described as follows : — 



Body crustaceous, elongate, articulate, when recent cylindrical 

 or nearly so, rolling spirally. Feet small, numerous ; segments 

 30 or more ; anterior segments smooth, posterior with transverse 

 wrinkles, giving a furrowed appearance. In some specimens traces 

 of a series of lateral pores or stigmata. Labrum ? quadrilateral, 

 divided by notches or joints into three portions. Mandibles two- 

 jointed, last joint ovate and pointed. Eyes ten or more on each 

 side. 



I have endeavoured, in figs. 4-9, to represent these characters 

 as they appear in several specimens. They leave no room to doubt 



Figs. 4-9. — Xylobius Sigillariae from the Coal-measures of Nova 



Scotia. 



Fig. 5. 



Fig. 4. 



Fig. 9. 



Fig. 4. Specimen of the natural size. 5. The head, magnified ; showing the 

 eyes. 6. The labrum (?), magnified. 7. The mandible (?), magnified. 



8. The anterior part of the body, magnified ; showing the lateral pores. 



9. The posterior part of the body, magnified ; showing the longitudinal 



the aflinities of the creature ; but I have not the means of comparison 

 with the various genera into which the Chilognaiha have been di- 

 vided by some modern authors. For this reason, in the hope that 

 some one who has made these animals a special subject of study will 

 institute such comparison, I send several of my best specimens with 

 this paper. 



The Xylobius Sigillarice must have burrowed among the vegetable 



