Turner, Notes Upon the Gallery Spider. 107 



A. — After two days had elapsed, the spider constructed a 

 web the main sheet of which extended from the top of the pa- 

 per to the top of the central post. There was no guard sheet. 

 The spider concealed himself in a crevice between the paper 

 and the side of the jar. There was no true gallery. But the 

 main sheet, which extended over the top of the paper angle to 

 the side of the jar, was pierced at one place by a cicular hole. 

 Through this hole the spider came and went. At first this web 

 occupied only half-of the available space. But the next night 

 the web was increased until it formed a complete horizontal 

 partition in the jar. I destroyed this web. 



B. — The w^b was reconstructed. In all essentials it agreed 

 with the web first constructed. I destroyed this web. 



C. — The web was reconstructed, but in a different part of 

 the jar. This time the main sheet extended obliquely upwards 

 from the floor to the side of the jar opposite the paper angle. 

 The lowest portion of the web was near the central post, while 

 the highest was opposite the paper angle and about three inches 

 above the level of the sand. There was no guard web. The 

 vertical gallery was built against the glass at the highest point of 

 the web. This web was not disturbed. 



D. — The above web had not been completed two days, be- 

 fore the spider remodeled it. The main sheet was extended 

 horizontally from what had been the highest point of the web to 

 the central post. The upper portion of the gallery was increased 

 by the addition of a horizontal tube about one inch long and a 

 half inch in diameter. Near the side of the jar the gallery 

 expanded into a large room with a diameter, along the side of 

 the jar, of from two to three inches The roof of the gallery 

 was supported by tension strings which extended from the distal 

 edge of the roof to the opposite side of the jar. 



Example XXXVI. — An arachnarium was arranged as 

 above ; but, instead of having one central post and a paper 

 angle, four posts were arranged so as to form a square. 



A. — One spider was placed in the jar. After the lapse of 

 a few days a web was constructed. The main sheet was hori- 

 zontal and attached to the side of the jar and the top of one 

 post. A vertical gallery was constructed against the side of the 



