20 XLIX. K. Sulc: 



Papillar ducts (fig. 4a). 



AmpuUaceous ducts (fig. 4&). 



Spině ducts (fig. 4c, (í) hitherto called „spines" are decidedly 

 ducts of ceriferous glands, because there open into them, as into the 

 ampullaceous and papillar ducts small, shorter or longer tubes (v, tr), 

 inílated, and bearing „crown" on centrál end (nd, kr). 



On the prothorax (fig, 1. I) there are : 9 — 15 small ventral cy- 

 linders ; 



on the mesothorax (fig. 1. II) 15 — 20 ventral cylinders, 3 — ^6 

 hairs ; 



on the raetathorax (fig, 1. III) 13 — 24 ventral, 3 — 7 dorsal cy- 

 linders ; 2 — 4 hairs and 6 — 8 papillar ducts ventrally. 



Two pairs of stigmata ; tlie first of which is prothoracal and has 

 2 — 3 parasťigmatal spinnerets; the second metathoracal is without 

 them. 



1«* abdominal segment (íig. 1. etc.) bears: 9 — -14 ventral, and 

 5 — 9 dorsal cylindrical ducts; 7 — 16 papillar ducts: 3 dorsal and 2 

 ventral hairs. 



2"^ abdominal segment is provided with: 7— ^12 dorsal, 4 para- 

 median cylinders, 4 — 6 ampullaceous ducts; 2 — 3 ventral hairs; it 

 raises towards the 3''' abdominal segment forming a law protuberance, 

 on which opens one cylinder. 



3'*^ abdominal segment: 5 — 8 dorsal, 6—8 paramedian cylindrical 

 ducts, 3 — 6 (usually 4) ampullaceous ducts; 2 — 3 ventral hairs. 



4**' abdominal segment : 2 — ^5 dorsal, 6 — 7 paramedian cylinders, 

 3 — 4 ampullaceous ducts, 2 — 3 ventral hairs ; between them a group 

 of 2 — 3 pores of the simple ducts; 3 hairs medially of it; on the 

 periphery one strong hair. 



The simple ducts can appear singly on the ventral side of every 

 part of abdomen. 



Telson (fig. 2) is hyperbolic on the anterior limit, truncate po- 

 steriorly; the length is equal to 3 foregoing abdominal segments to- 

 gether ; cuticula not everywhere of the samé thickness ; on the dorsum 

 it is diífusely thickened towards the end from a parabolic line, which 

 is impressed under the apex and proceeding' anterior to the anal 

 apertuře — on the ventral side from the genital apertuře towards 

 the end again. 



Circumscribed thickened are „thickenings of the body wall" ven- 

 trally, which are the continuation of the lateral parts of the lobi — 



