334 OLIGOCHAETA 



vessels ; Michaelsbn pointed out that the gland is formed of a mass of glandular 

 tubes in connection with the lumen of the gut, which are suiTOunded by a blood- 

 sinus continuous on the one hand with the sinus surrounding the alimentary canal 

 lying behind the divei-ticulum, and on the other hand with the dorsal vessel ; the 

 tubes appear to be intracellular, hut do not seem to be ciliated ; the whole gland 

 is covered by a layer of peritoneum. In transverse sections its paired character 

 becomes apparent, but the two halves are enclosed within one peritoneal sheath. 

 This genus Buchholzia is the only genus with ' Pachydrilus-setae ' which has salivary 

 glands ; these glands are small and formed of a short duct which expands at the 

 blind extremity into a group of oval sessile diverticula ; they open some way behind 

 the pharynx. 



(i) Buehliolzia appendiculata (Buchholz). 



Enchytraeus appendiculatus, Buchholz, Schr. Phys.-Oek. Ges. Konigsb. i86a, 



P- 93- 

 E. pellucidus, Vejdovsky, SB. Bohm. Ges. 1877, p. 301. 



E. (Mesenehytraeus) appendiculatus, Vejdovsky, Syst. u. Morph. 1884, p. 40. 

 E. (Mesenehytraeus ? Eisbn) appendiculatus, Michaelsen, Ench. Mob. 1886, p. 47. 

 B. appendiculata, Michaelsen, Arch. mikr. Anat. 1886, p. 393. 



Definition. Length, 10 mm.; numher of segments, about 2,S ; setae, ^ in lateral hundles, 4-6 

 in ventral ; clitellum on Til, Till. Testes in VII; spermathecae in V with long duct 

 to which are apperuled two large glands. Hai. — Germany; Denmark; Bohemia; Italy. 



As may be inferred from the above list of references, the present species has been 

 the subject of a considerable amount of study. It is indeed one of the best known 

 of the Enchytraeidae. The differences which it shows from Buchholzia fallax will 

 be mentioned under the description of the latter species. For its anatomy see also 

 Vejdovsky (3), Michaelsen (1). 



(2) Buchholzia fallax, Michaelsen. 



B. fallax, Michaelsen, Arch. mikr. Anat. 1887, p. 374. 



Definition. Length, 10 mm. ; setae, 4-6 per bundle of different lengths. Sexual organs 

 occupying the usual situation ; spermathecae with diverticula near to distal swollen 

 extremity, two large glands at external pore. Hob. — Germany. 



This species has been investigated by Michaelsen. Its chief difference from the 

 last species is that the sexual organs occupy the position which these organs occupy 



