DESCRIPTIONS OF GENERA AND SPECIES 347 



ventral 6, m dorsal bundles, in posterior region 3. Aanteseptal part of nephridium short, 

 will brown pigment. SpermatJiecae with numerous diverticula, which are solid. Hab. — 



This species is to be easily known by the fact that the diverticula of the 

 spermathecae, or, to speak more accurately, the appendages of that organ, which 

 appear to correspond to the diverticula of other species, are solid, and probably 

 (Michaelsen) function as glands. The brain is concave behind. The salivary glands 

 are provided with numerous branches. The duct of the nephridium arises just 

 behind the septum ; Vejdovsky does not state whether the anteseptal part of that 

 organ has a straight or contorted lumen. 



(9) Pridericia ratzeli (Eisen). 



Enehytraeus Batzeli, Eisen, Ofv. Svensk. Akad., 1873, No. i, p. 123. 



Neoenchjrtraeus Ratzelii, Eisen, Ofv. Svensk. Akad., 1878, No. 3, p. 77. 



E. Ratzelii, Levinsen, Vid. Med., 1883, p. 237. 



E. (Neoenchytraeus) Ratzelii, Vaillant, Annelds, p. 262. 



Friderieia Ratzelii, MiCHAELSEN, Abh. Nat. Ver. Hamb., 1889, p. 44, 



Definition. Length, ^omm.; number of segments, 60; setae, 6-8 anteriorly, ^posteriorly. 

 Anteseptal part of nephridia narrow, but with contorted duct ; its duct arises just behind 

 septum. Spermathecae with 6-13 diverticula, with a few small glands at base of duct. 

 Hab. — Norway; Germany; Italy. 



The brain has a convex hinder margin. The salivary glands are branched. Ude 

 states that at the external pore of the spermathecae are two large stalked glands 

 instead of the numerous small glands figured (PI. xii. fig. xxii c) by Eisen. 

 Levinsen, on the other hand, says : ' Kecept. seminis ved Udmundigen uden 

 stilket Kjertelmasse.' For structure see, in addition to above references Ude (1), 

 Eisen (13), and Hesse, who describes ' copulatory glands ' like those of F. antarctica 

 in the thirteenth segment. 



(10) Pridericia dura (Eisen). 



Ifeoenchytraeus durus, Eisen, Ofv. Svensk. Akad., 1878, No. 3, p. 77. 

 Enehytraeus durus, Vejdovsky, Syst. u. Morph., 1884, p. 41. 

 E. (Ifeoenchytraeus) durus, Vaillant, Annelds, p. 363. 

 Pridericia dura, Michaelsen, Abh. Nat. Ver. Hamb., 1889, p. 44. 



Definition. Length, 16 mm.; number of segments, 45 {about) ; setae, 6 per bundle. Anteseptal 



Yy 2 



