EXPLANATION OF PLATE X. 



Enchytraeus barkudensis , sp. nov. 



Fig. i. Longitudinal section through pharynx and part of oesophagus, a little 

 to one side of the median plane, and cutting the club-shaped salivary gland; x 145. 



Fig. 2. Longitudinal section passing to one side of the alimentary canal in 

 segments x and xi, and showing the sperm-sac suspended by septum 10/11, the testis 

 being constituted by a proliferation of cells on its inner wall; x 190. 



Fig. 3. Ventral half of a similar section, nearer the middle line, showing the 

 relations of the sperm-sac below the oesophagus (the portion of the section here 

 shown is bounded above by the ventral wall of the oesophagus); x 190. 



Fig. 4. Male déferrent apparatus, sketched from an entire specimen in cedar 

 oil. 



Cil. ep., ciliated epithelium of ventral wall of oesophagus; d.v., dorsal vessel; ep., surface epi- 

 thelium ; /., male funnel ; m., muscular coat of body-wall; mor., sperm-morulae ; m. ph., muscular bands 

 of the pharynx, mostly retractors; oes., oesophagus; p.b., penial body; peril., peritoneal cells or 

 nuclei; ph., pharynx; sac, sperm-sac; sal., salivary gland (so-called "peptonephridium ") ; sept. 

 9/10, 10/ir, 11 12, septa; t., testis; v.d., vas deferens: v.v.', ventral vessel. 



FiGS. i, 2 and 3 drawn by Abbe's drawing apparatus (Zeiss). 



