io6 Journal of Comparative Neurology. 



of the web. The distal corners of the patch were attached to 

 the supports a little above the former web. 



Example XXXIII. — A small hole was made in the main 

 sheet of nine different triangular webs. In each case the web 

 was patched. Tlie new spun web usually extended beyond the 

 border of the hole but in no case did it cover the entire web. 



Example XXXIV. — A large circular hole was made in 

 the main sheet of three different triangular webs. A slender 

 post was erected in the centre of each hole, care being taken 

 not to allow the post to come into contact with the main sheet. 

 One spider did not patch its web. The second spider partly 

 patched it. The patch being attached to the main sheet and to 

 two adjacent sides of the post. The third constructed a com- 

 plete patch, attaching it to the main sheet and to the post 



The' three preceeding examples teach us that, as in the orb 

 weaving spider ' and in the purseweb spider, - so here, the 

 spider patches its web whenever circumstances render it 

 necessary. 



Exa.mple XXXV. — .\n arachnarium was constructed in 

 the following manner. Took a large battery jar and covered 

 the bottom with moist sand to the depth of about one inch. 

 Moist sand was then smeared on the sides of the jar, to within 

 three inches of the top Such a jar formes an excellent 

 arachnarium. Ordinary spiders can ascend the glass only so 

 far as the sand extends. In the centre of the bottom a slender 

 four inch post was erected. An angle was formed of paper and 

 placed in the jar. The apex touched the side of the jar. The 

 two extremities touched the j ir on opposite sides of the apex and 

 at a distance of about one fourth the circumference of the jar 

 from the apex. This angle vvas about four inches high. A 

 spider was taken from a triangular web and placed in this jar. 



1. F. Dahl — Versuch einer Darstellung der psychi.schen \'organge 

 in den Spinner. Vierteljahrsschrift f. IViss. Philosophie. Bd. IX, \y. 162. 



George J. Romanes — Animal Inlelligence. pp. 211 (1883) 



2. Henry C. McCook — Nesting Habits of the American Purseweb 

 Spider. Proc. Academy of Natural Sciences of Philadelphia. 1888, part 

 II, \i\>. 206. 



