DESCRIPTIONS OF GENERA AND SPECIES 



355 



as is so very generally the case with the Enchytraeidae. Both species have taste-papillae, 

 and in both the brain is convex posteriorly. 



(i) Anachaeta eisenii, Vejdovsky. 

 Achaeta Eisenii, Vejdovsky, SB. Bohm. Ges., 1877, p. 300. 

 Anachaeta Eisenii, Vejdovsky, Ench., 1879, p. 60. 

 Definition. Length, 13 mm.; number of segments, 30; four seta-glands in each segment. 



Spermathecae oval, with a duet not sharply marked off from pouch. Hah. Bohemia ; 



Germany. 



The structure of this species is described and illustrated in Vejdovsky's Monograph 

 of the Enchytraeidae. A good many of the characters of the species have been already 

 dealt with in the account of the genus. A few remain, which are either of less 

 importance or differ in the two species, to be noted here. The dorsal vessel arises, 

 according to Vejdovsky (3, pp. '^'3, and 61), in the sixth segment, and has two 

 dilated hearts, one in this segment and one in the preceding segment ; Ude, however, 

 who has more recently examined the worm, says that this vessel arises in segment viii, 

 and that there are three swellings, which, therefore, presumably lie in segments vi, vii, 

 viii. The nephridia have a long anteseptal region, which is constricted off from the 

 postseptal half of the organ by the septum; the lumen is very undulating in its course 

 in the anteseptal part of the nephridium. In a longitudinal section through the 

 body-waU (3, PI. i. fig- 2 gl) Vejdovsky represents a series of epidermic glands of large 

 size which lie at the junction of every two segments, occupying the position, in fact, 

 that is occupied in the genus Fridericia by the dorsal pores, elsewhere wanting. 

 Vejdovsky says nothing of these glands in his Monograph (24) ; it is, therefore, 

 to be supposed that there is no special peculiarity in the arrangement, but that they 

 are simply some of the numerous glands which occur in the integument generally. 

 The funnel of the sperm-duct is five or six times as long as broad; the duct 

 is spirally twisted, forming a very compact coil ; the external pore is beset with 

 prostates. The spermatheca is an oval pouch, passing gradually into the duct ; the 

 external pore is beset with glands. 



(2) Anachaeta bohemica, Vejdovsky. 



Anachaeta bohemica, Vejdovsky, Zool. Anz., 1879, p. 183. 



Definition. Only two rows of seta-glands, corresponding to the dorsal series of setae. 

 Spermatheca consisting of a small oval pouch, into which opens laterally a very long 

 diverticulum, expanded into an oval pouch at extremity. Hab. — Bohemia. 



z z 2 



