158 Miscellaneous. 



male immature?, May 1818 ; adult, June 1849 ; female adult, June 

 1848, July 1849. Abdomeu of the male bright purple. 



Epeira diadema. Female immature. May 1848. 



conica. Male immature, March 1848, October 1847 ; female 



immature, March, April 1848. 



Epeira cucurbit ina. INIale adult. May, June 1848, June 1849 ; 

 female immature, May, June 1848 ; female adult, June 1848. 



Epeira {i7i(dinata1). Male adult, June, August 1849; female 

 adult, July 1849. 



Epeira {Solersi). Female, September, Broadstairs, 1848. 



bicornis. Male adult, June 1848. 



Tetragnatha extensa. Immature, April, May, September (Broad- 

 stairs), October 184/. On the spruce fir. — Male immature, March, 

 May 1848; male adult, August 1849; female adult, September 

 (Broadstairs) ; female immature, June, August, October. 



Linyphia trianr/ularis. Male adult, August 1849; September, 

 Broadstairs, 1848: female? immature, July 1849. 



Linyphia {montanaX). Male immature, August 1849 ; female, Au- 

 gust 1849. 



Linyphia {rubra'!). Male adult, April, May 1848. 



cautal Male immature, July 1849. 



OoHops pulcher. Female, November 1847. 



Theridion lineatum ; var. formerly known as T. redimitum. Male 

 immature. May, June 1848, June 1849 ; male adult, June 1848, July 

 1849 ; female adult, June, July 1848, 1849 ; female immature, June 

 1849. 



Theridion Sisyphus. Female immature, August 1849. 



nervosum. Male adult. May, June 1848, June 1849 ; female 



adult, June 1848. 



Theridion pulchellum. Male adult. May, June 1848, June 1849 ; 

 female adult. May 1848 ; September, Broadstairs, 1848. 



Theridion deniiculatum 1 Male immature. Under bark of plane- 

 trees, December 1847. 



Theridion puUensI Female adult, May 1848. 



On the Circidation and Digestion in the lower Animals. 

 By Prof. Agassiz*. 



Prof. Agassiz read a paper on the circulation and digestion in the 

 lower animals, showing that the circulation in the Invertebrata cannot 

 be compared to that of the Vertebrata. 



Instead of the three conditions of chyme, chyle, and blood, which 

 the circulating fluid of the Vertebrata undergoes, the blood of that 

 class of the Invertebrata which he had particularly studied, the 

 Annelida, is, according to Wagner, simple chyle, coloured chyle ; the 

 receptacles of chyle in different parts of the body are true lymphatic 

 hearts like those found in the Vertebrata : this kind of circulation is 

 found in the Articulata and MoUusks with few exceptions, some 

 Echinoderms, &c. In the IMedusse and Polyps, instead of chyle, 

 chyme mixed with water is circulated : this circulation is found in 



* Proc. Best. Soc. Nat. Hist. 1850, p. 20fi. 



