British Encliytrmds. By Rev. H. Friend. 



261 



organ appears, probably the testes. This point will be considered 



again. 



The special glands found in young forms in segment 3, and 

 the fifth pair of septal-like glands in segment 8, seem to disappear 

 with maturity. Large chloragogen cells, sparsely found in seg- 

 ments 4 to 7, then in full number to the end of the body. No 

 nephridia in front of girdle ; first found in segment 9/10, with very 

 large postseptal, and a duct of similar length springing from behind 

 the septum. Vascular system intensely delicate, and difficult to 

 observe. Spermathecse large and well defined, with large gland 

 near the opening, but without diverticula ; opening into the 

 intestine. Coelomic corpuscles large and nucleated. No salivary 

 glands. 



Found in earth {Chamie) by the stump of a tree, which had 

 been cut down, and not with Bryodrihis under the moss of the 

 decaying trunk. Later found in other localities under exactly 

 similar conditions. The intestine often coloured green or yellow 

 by the living algse, on which it feeds — hence the specific name. 



Y. — Cham.edrilus, Buchholzia, and Marionina. 



Buchholz (4) in 1863 described an Enchytraeid under the name 

 EncliytTcTus appendiculatus, which differed so widely from other 

 species of Enchytraius that Michaelsen (J) founded a new genus 

 and called it Buchholzia. Later another species {B. fallax Mich.) 

 was found, and more recently still the genus has been yet further 

 extended. With the exception of B. appendiculata, however, the 

 newer species generally have the organs in the normal position. 

 Our new worm, in certain particulars, resembles the aberrant 

 Bicchholzia, and might at first be thought to be a new species of 

 that genus. The differences, however, are so pronounced that one 

 has only to place them side by side to show the impossibility of 

 coupling them together. 



Buchholzia appendicidata. 



Length 10 mm. 



Setae 3 to 6 per bundle. 



Salivary glands present. 



Brain truncated behind. 



Girdle on segment 8. 



Dorsal vessel preclitelliau. 



Postseptal of nephridium gradu- 

 ally narrowing into a duct. 



(Esophagus suddenly widening 

 in segment 7. 



Spermathecae with two glands. 



June 18th, 1913 



Chamsedrilus chlorophilus. 



Length 5 to 15 mm. 



Setae 2 to 3 per bundle. 



Salivary glands absent. 



Brain incised behind. 



Girdle on segment 9. 



Dorsal vessel postclitellian. 



Duct distinct from the post- 

 septal. 



(Esophagus not widening sud- 

 denly. 



Spermathecae with one gland. 



T 



