Studie o Coccidech. 21 



then a narrow zone between the groups No. 3 of cylindrical ducts 

 with slingshaped orifices. 



These cylindrical ducts open on 8 places of the whole periphery 

 of the telsou (Xo. 1. 2. 3. 4.). 



There is in the 1"^* eighth of the whole periphery one cylinder, 

 two in the 2'"' and S'*^ and finally one more in the middle of the 4"' 

 eighth; under the No 1'* we find on the ventral side generally, and 

 under the No 2"^ but rarely an ampuUaceous duet; under the No 

 3"^ and 4''' , further at the sides of medián line are two spineducts 

 on each segment. Ventrally, from the No 1, 2, 3 inwardly are 2 — 3 

 openings of the simple ducts; a similar group is above the pro- 

 jected anus. 



There are also several groups of cylindrical ducts with circular 

 openings on the dorsal side: one, composed of 2 ducts, just on the 

 beginning of the telson, the 2"*^ consisting of 3 — 5 ducts in an im- 

 pression of the curve limiting anteriorly the diífuse thickening of the 

 chitin, the 3'^' of 2 ducts on its posterior end, the 4"' also of 2 ducts 

 behind and outwardly í)f the anal apertuře. 



The first pair of lobes (sensu Comstock) is large and varies 

 greatly in form, as is showu in fig. ó'""; the 2'"^ smaller and the 3''^ 

 smallest of all are between the cylindrical ducts No 3 and 4. 



Genital apertuře in form of a íissure is found nearly in the 

 middle of the telson, ruuning into the body into a vagina (fig. 2 vg). 



The circular anal apertuře opens dorsally on the end of the 

 first fourth of the telson. 



5 groups of spinnerets : mesal group 1 — 7, the cephalolaterals 

 7 — 13, the caudolaterals 7 — 12. Each single discshaped, circular spin- 

 neret has a thick border and 6 openings, the centrál of which is 

 circular, the rest biscuitshaped ; 



Hairs on the ventral side: one of them stands always below 

 the group of cylindrical ducts No 1 and 2, one above the lobe of 

 the 3''' pair — 1 — 2 srn all near the group of the openings of simple 

 ducts, — 4 cephalad before the genital apertuře, — 3 before the 

 cephalolateral group of spinnerets — 3 — á from that to the anterior 

 end near the limit of the telson. 



Hairs on the dorsal side: one near the group of slingshaped 

 orifices of cylindrical ducts No 2 and 3, one above the lobe of the 2"^^ 

 pair, — 2 over the lobes of the 1^' pair, — one short behind and ou- 

 twardly of the anus, — one below it above the projected genital opening. 



Male unknown. 



