134 Dr. Carl Matzdorff: Bericht über die wissenschaftl. Leistungen 



llyodrilus; sperm duct much coiled, opening by an atrium also much coiled on 

 to Segment XII; atrium and the greater part of sperm duct inclosed in a 

 muscular sac drived from muscnlar tunic of atrium; sperm duct furnislied with a 

 long convoluted diverticulum ; oviducts opening ou to intersegmental groove 

 XII/XIII; alimentary tract ciliated troughout the entire length with the exception 

 of the buccal cavity. 



Phreodrilus n. gen. A single pair of owy elongated and coiled spermathecae, 

 opening on to exterior in front of dorsal setae of segment XITl. Septal glands 

 present, connected with pharynx. Nephridia wantiug in anterior segments. No 

 special sperm sacs or egg sacs. (?j 



Ph. subterraneus n. sp. Etwa 2 Zoll lang. Die Chloragogen- 

 zellen auf dem Oesophagus beginnen am Ende des 6. Segmentes. 



Pelodrilus n. gen. Moderately long, tbin worms, inhabiting marshy soll. 

 Setae simple in shape and strictly paired; absent only from the XII th segment 

 in the sexually ripe individuals. Clitellum extendinglover segments XI — XUI 

 (inclusive). Testes, two pairs in X and XI. Vasa defereutia opening by two 

 distinct pores on each side, placed one in front of the other upon the XII th 

 segment, greatly coiled, with funnels in the X th and XI th segments. No atria. 

 Sperm sacs occupying segments IX— XII. Ovaries in XIII; oviducts consisting 

 of little more than a funnel opening inimediately on to the exterior in groove 

 between segments XII/XIII. Ova large and few, euclosed in thin-walled egg sac, 

 Spermathecae, a Single pair in VIII. Septal glands present. Nephridia in all 

 segments after the VI th with the exception of XI and XII. Some of anterior 

 septa thickend. 



P. violaceus n. sp. Kurzes Prostomium. Nephridioporen vor 

 den ventralen Seten. Pelodrilus nähert die Familie der Phreoryctiden, 

 zu der er gehört, noch mehr, als die Gattung Phreoryctes das selbst 

 schon thut, den höheren Oligochaeten (F, S.). 



Derselbe (10). A New Branchiate Oligochaete (Branchiura 

 sowerbyi). — Quart. Journ. Micr. Sei., N. S. XXXIII, p. 325—341, 

 Taf. XIX. 



Vgl. Ber. f. 1891, p. 168. 



„Branchiura, nov. gen. Hinder 50—80 segments furnished with a series of 

 branchial processes, a pair to each segment, arising one from the dorsal and one 

 from the ventral median lines. Setae capilliform and uncinate, the former kiud 

 only found in the dorsal bundles of the anterior segments. An integumeutal 

 capillary plexus present. Atria consisting of a large oval sac enveloped, as in 

 Lumbriculidae, by a thick layer of peritoneal cells, and of a narrow tube leading 

 to exterior; vas deferens opens at junction of glandulär and non-glandular part 

 of atrium. Branchiura Sowerbyi, n. sp. Two pairs of specially dilated hearts 

 in Segments 9, 10. Intestine begins in 11; pigmented peritoneal cells appear 

 first in Segment 6." 



Die Gesammtzahl der Segmente ist mehr wie 120 und steigt 

 bis 170. Vor allem sind die Kiemenfäden des hintersten Körper- 

 abschnittes auffallend (s. o.). Cilien tragen sie nicht. In ihrer 

 Achse liegt ein Fortsatz der Körperhöhle. Unter der Epidermis 

 liegen Muskeln, darunter das Peritoneum. Branchiura steht den 



