104 ACANTMODRILUS SCHLEGELII. 



of pairs on the ventral side of the body, the distance be- 

 tween the two median pairs being somewhat smaller than 

 that between the median and lateral ones. The cephalic 

 lobe is oval , with its broadest end directed forwards ; it 

 extends not only over the buccal segment , but also into the 

 second (first setigerous) ring, so that the buccal segment seems 

 to be provided with setae. There is no trace of a clitellum. 



Between the 13th and 14th segment the first dorsal 

 pore is to be found. At the ventral side of the 17th, 

 18th and 19th segment, which are shorter than the pre- 

 ceding and following rings , a depressed area is to be ob- 

 served , surrounded by an oblong wall with rounded angles. 

 In each angle of this area , on the 17th and 19th segment, 

 a pair of penial setae is situated ; they are placed just in 

 the series of the median pairs , to which they are corres- 

 ponding. These specially modified setae have a length of 

 4 m.m. , they are slightly curved , with the proximal end 

 swollen , and the distal end obtusely pointed. Their exter- 

 nal half shows a particular appearance , due to the pre- 

 sence of densely spread small pits. At the internal side 

 of the 17th and 19th ring, close to each pair of penial 

 bristles , an undulated glandular tube is situated , the pro- 

 stata. In the 12th and 13th segment, upon the posterior 

 side of the mesentery , a pair of oblong flat organs is fixed, 

 probably representing the testes; however this could not 

 be made out with certainty, as I could not find nei- 

 ther the spermatozoa nor the vasa deferentia. On the 

 boundary-line between the 7tli and 8th, the 8th and 9th 

 segment , close to the ventral mesial line , a pair of small 

 oval vesicles is situated , corresponding to the copulatory 

 pouches. 



In the 15th, IGth and 17th segments the alimentary 

 canal is provided on each side with reniform coeca , the 

 surface of which is divided by parallel grooves in numerous 

 small lobes; by a branch, given off' from the dorsal ves- 

 sel, these glands are provided with a great number of 

 bloodvessels. No doubt they belong to the same category 



Notes from the Leyclen JMiiseuni , Vol. VI. 



