500 



ABACHNIDA. 



dorsal surface of the cephalic region behind the frontal margin. 

 Their arrangement is very regular, and is characteristic for the 

 different genera (figs. 398 and 399). 



K 



O 



o 



oo 



o o 



o 



O 



o 







00 



ooo o 



o o 

 OGO 



d 



FIG. 399. Arrange- Fio. JOO. Alimentary canal 

 ment of the eyes in of Mygate fregne animal). 

 G, Cerebral ganglion; Ms, 

 diverticula of stomach ; 

 X, hepatic ducts ; N, Mai- 

 pighian vessels; S, rec- 

 tum. 



different spiders 

 (after Lebert). <?, 

 Epeira ; b, Tegenaritt ; 

 c, Dolomedei ; d, Sal- 

 ticus. 



(). 



FIG. 397,Mygale from the ventral 

 side, part of the skin is turned aside 

 (regne animal). K, Chelicera : Bg, m . . . 



thoracic gangiionic mass; p, t', fhe alimentary canal (fig. 400) 

 lungs; F, lamellae of the lungs; begins beneath the upper lip with an 



St, St', stigmata; On, ovary; Stc, 



spinning papilla. ascending pharyngeal portion of the 



oesophagus, into which a saccular pha- 

 ryngeal gland opens (salivary gland). 

 The narrow oesophagus, before passing 

 into the midgut or intestine, is dilated 

 to form a suctorial stomach, which is 

 furnished with powerful muscles aiising 

 from the dorsal part of the cephalo- 

 thorax. The midgut is divided into 



FIO. 398. Anterior part of the cepha- an anterior part, lying within the 



1 cephalo thoracic region and provided 

 with two anterior and four lateral pairs 

 of caeca, and into a narrower abdominal small intestine, into which the 

 ducts of the branched hepatic tubes pour their secretion. The latter 



