PSEUDO-SCORPIONID.fi. PH AL ANGIDJE. 



227 



Fio. 448. GALBODES INTREPIDA. 



763] The general form and aspect of the PSEUDO-SCORPIONI- 

 D2G will be best understood from the accompanying figures, which 



represent two of 

 the principal spe- 

 cies. .The Ga- 

 leodes is found in 

 the warmer tem- 

 perate and the 

 tropical regions, 

 principally of the 

 Old World. They 



run with great quickness, erect their heads when surprised, show 

 signs of resistance, and are reputed to be venomous. The 

 Chelifer strongly resembles a small Scorpion deprived of its tail ; 

 and one species, which inhabits herbaria, old books, &c., feed- 

 ing upon the minute insects which fre- 

 quent such situations, is commonly known 

 under the name of Book- Scorpion. It 

 runs quickly, and often sideways, like the 

 Crabs or the Laterigrade Spiders. The 

 effffs are united into a mass, which is said 



oo 



to be carried about under the abdomen. 



764. Here has been placed, by many 

 Naturalists, a very curious group, the 

 PYCNOGONID.E; which departs very widely 



from the other Arachnida, both in the structure of the body, as 

 well as in the residence, which is exclusively marine. It 

 appears to be destitute of any special Respiratory apparatus; 

 and cannot, therefore, be referred with certainty either to this 

 class or to the Crustacea, by characters derived from the mode 

 in which this function is performed. On the whole, however, 

 its analogies seem to be rather with the latter class ; with which, 

 therefore, it will be described (815). It may be regarded 

 as connecting the Arachnida and Crustacea. 



765. The PHALANGID^E, or Harvest-men, have two thread- 

 like palpi, terminated by a small hook ; the legs are long and 

 slender, and when detached from the body, they show signs of 



Q2 



FIG. 449. CHELIFER 

 FASCIATUS. 



