4i8 



ZOOLOGY 



in eating, and the third leg also sends in a process towards the 

 mouth, recalling the condition of things in Scorpio. 



The abdomen consists of six to ten segments ; its sterna 

 project forward, and, as the anterior one bears the genital pore, 

 this orifice is situated at the level of the third pair of legs. 

 Just behind this are the two stigmata which open into the 

 tracheae. These are at first wide, but they soon narrow and 

 subdivide into small branches ; the whole system is strengthened 

 by a spiral thickening of chitin. 



The oesophagus is wider than in spiders, and the Phalangids 

 eat solid food; the stomach is provided with a number of 

 caeca, and there are a pair of Malpighian tubules ; the anus is 

 terminal. The coxal glands are well developed; they consist 

 of a coiled tube, which it is suggested has been mistaken for 

 the Malpighian tubules ; this opens at one end into a ventrally 

 placed sac, and at the other to the exterior at the base of the 

 third pair of legs. 



The heart is a long dorsal vessel with three chambers and 

 three pairs of ostia. The nervous system consists of a bilobed 

 supra-oesophageal ganglion and a concentrated ventral mass. 

 There are no spinning-glands. 



The Phalangids have no external indications of sex. Both 



Fig. 239. — Phalcmgium cornutwm, Linn. (Haivestman). 

 palpi truiicated. 



Profile, with legs and 



a. Bye eminence. 



i. Chelicerae. 



c. Portion of moutli apparatus. 



d. Sheath of penis protruded. 



e. Penis. 

 /. Glans. 



