Lma.r Scn^oerhyi of Ferussac, 6^3 



me when making these observations twenty years ago, which 

 might possibly now be removed, I seized the first opportunity 

 of reexamining a net of Epeira diadema, which presented 

 precisely the appearances which I have described, namely, 

 the rays free from all gum, and not at all adhering to a splinter 

 of wood brought into contact with them ; but the concentric 

 circles thickly studded with drops of gum, and adhering so 

 closely to the splinter as to be pulled by it a full inch out of 

 the plane of the net. 



Such being the facts, to what are we to attribute Professor 

 Rennie's inability to verify them ? I can only conjecture, to the 

 circumstance of his having examined an old net ; for in such 

 the gum is partly evaporated by the sun and air, and some of 

 the globules may possibly, in some cases, be transferred by 

 the struggles of the entrapped flies to the rays. But let Pro- 

 fessor Rennie examine (as surely he ought to have done) a 

 perfectly recent net, or, still better, one in the process of 

 making, before its rays have had all the circles attached to 

 them; and if he (or any of your readers who wishes to judge 

 between us) does not then see as I have seen, and as we have 

 described in our book, 1 shall, indeed, marvel. 



I am, Sir, yours, &c. 

 Como, Sejpt. 3. 1832. W. Spence. 



Art. 1 1. Some Account of the Umax So'voerhyi of Ferussac, By 

 John Denson, Jun. A.L.S. 



Some of the Bays water gardens are rich enough in slugs ; 

 and among these are numerous individuals of a species very 

 distinct from any species that inhabits the limited portions 

 of Cambridgeshire and Suffolk with which I happen to be 

 acquainted. By submitting living individuals of this slug to 

 Mr. James de Carle Sowerby (5. Camden Terrace West, 

 Camden Town), I have learned the following facts respecting 

 it. Mr. G. B. Sowerby, being unable to identify it with any 

 species described, sent specimens of it to Paris, where it had 

 not been before seen, and was determined to be an undescribed 

 species. Subsequently, the Baron de Ferussac has published 

 a description of it, and named it Zyimax Sowerb// [Sowerby?] 

 in his Histoire Naturelle des Mollusques terrestres etjluviatiles. 

 Mr. Sowerby referred me to his copy of this work, and thence 

 (from the Supplement to the Genus Zunax, p. 96. ?) the follow- 

 ing description is copied : — 



" Limas de Sowerby. iimax Sowerbw nobis. PI. VIII. D. figs. 7, 8. 

 Lutescens, fusco tesseratus ; capite et tentaculis nigris ; clypeo granuloso, 



Y Y 3 



