12 Structure of seme of the Organs of a Spider. 



pearance of the maxillae would carry us, it is easily separable 

 by the size of the eyes, the greater curvature of the rows, 

 the lip, mandibles, and palpi, and, above all, the great length 

 of the legs. It weaves, in the corners of unfrequented build- 

 ings, a coarse irregular net with a recess, in which it awaits 

 its unlucky prey. When at rest, it is usually supported by 

 the legs, as represented by the outline p ; and then the tibiae, 

 standing perpendicularly, present the appearance of a series 

 of columns. 



In examining the insect minutely with a magnifying power 

 of about 30, I was struck with the appearance presented by 

 the hairs about the claws : these (the tip of one is seen at I) 

 were very stiff, spine-like, and serrated along the edges, 

 especially at the apical extremity (/), and nearly all arose from 

 the under surface of the tarsus, enveloping the claws (seey). 

 A single claw is figured at g, to show its form, and the pec- 

 tinated teeth, thirteen or fourteen in number. I found that, 

 along the whole legs, the hairs had more or less of this 

 appearance (/); the serrae, however, diminishing in sharpness as 

 I approached the body ; and among these, and lying close to 

 the limb, were other finer downy hairs, from the sides of 

 which proceeded alternate secondary hairs : a representation 

 of one of these is given {n). The leg itself is shown at h and 

 i, the latter being the tarsus. The discovery of these ano- 

 malies (anomalies from anything I had before observed) in- 

 duced me to examine other portions of the body ; and I 

 found that some of the hairs, or rather spines, jutting out 

 from the mandibles, had hairs differing from the former : from 

 these innumerable little processes proceeded in a spiral direc- 

 tion, as seen at Jc, being most strongly marked towards the 

 tip of the spine. On the palpi the spines were merely ser- 

 rated (see o), and only on the last three joints. I could not 

 find any elsewhere. On the exterior portions of the maxillae, 

 both kinds of hairs or spines were detected ; but along the 

 inner edge, the tufts were found to have hairs quite flat and 

 smooth until within a little of the apex, where they became 

 plumed mostly on one side alone. The longer curved ones 

 at the extremity of the maxilla were exactly similar : they 

 are represented at e, and a few detached have this portion 

 represented at m, A singular appearance also presented itself 

 in a row of sixty-eight minute blunt teeth extending the whole 

 length of the curved extremity of the maxilla: two of these, 

 highly magnified, are shown at e\ I now recollected having 

 once before observed teeth similarly situated, but I have for- 

 gotten in what species; but it would seem likely, if detected 

 in a few, to offer characters which might be appropriated for 



