INVERTEBKATE ANIMALS. 85 



H Examples of about 22 species of scorpions, 

 including the Black or Eock-scorpion of Africa, 

 the most formidable of the family. Several 

 species of Phnjnus. Observe in the largest 

 example, which is probably of an undescribed 

 species, the extreme length and slenderness of 

 the many-jointed tarsi of the first pair of legs. 

 Thelypkonus, the Whip-scorpion, is found in 

 Mexico, Brazil, India, Java, and other hot 

 countries. Its bite is poisonous (Packard). 



Upper Compartment. 

 Scorpion articulated. 



Group 196.— Order ARANEIDA. Spiders. Head and tho- 

 rax amalgamated; abdomen not segmented; eyes six or 

 generally eight. The life-history of spiders is deeply 

 interesting; that of the British species has been well 

 told by E. F. Staveley. 



Space is here deficient, but some of the more 

 remarkable forms are exhibited, including Gasteracan- 

 tha and Acrosoma, with bodies armed with long spines 

 and glittering during life with brilliant metallic colours. 

 Estimated number of species, 1,120 (Walckenaer) ; 

 British, 303. (Blackwall). 



1[ Small series of British Spiders presented by J. 

 Blackwall, F. L. S., author of " A History 

 of the Spiders of Great Britain arid Ireland." 



Upper Compartment. 



About 14 species of Mygale, /xuyaA>i, a Field-mouse ; 

 tubular nests of Mygale, showing the trap- 

 door ; female Mygale, with egg-cocoon, kc. 



