DESCRIPTIONS OF GENERA AND SPECIES 345 



Definition. Length, 12 mm.j number of segments, 45; setae, 3-4 per bundle. Anteseptal ])art 

 of nephridia not large, but with a convoluted duct, and covered with brown pigment. 

 Spermathecae with two large diverticula, without glands at base. Hab. — Bohemia; 

 Italy. 



The brain of this species is nearly twice as long as broad, with a convex posterior 

 margin; the salivary glands are sparely branched. The funnel of the male efferent 

 duct is about three times as long as broad; the ducts themselves very long and 

 thin; there are spermiducal glands, but Vejdovsky has given no details as to their 

 size, &c. This species is not identical with Michaelsen's (4, p. 47) Enchytraeus 

 leydigii (for which see above, p. 344). 



(6) Pridericia perrieri (Vejdovsky). 



Enchytraeus Perrieri, Vejdovsky, SB. Bohm. Ges., 1877, p. 30a. 

 E. (Neoenehytraeus) Perrieri, Vaillant, Annelds, p. 256. 

 Ifeoenchytraeus Perrieri, RosA, Boll. Mus. Zool. Torino, 1887, No. 29. 

 ?E. (Neoenchytraeus, Eisen) Perrieri, Michaelsen, Ench. Mob., 1886, p. 47. 

 Pridericia Perrieri, Michaelsen, Abh. Nat. Ver. Hamb., 1889, p. 43. 



Definition. Length, 15 mm.; number of segments, 58; setae, 4.-6 per bundle, more numerous in 

 ventral bundles. Anteseptal part of nephridium long and tian-ow, but with contorted duct. 

 Spermathecae with two diverticula, dilated at their blind extremity. Salivary glands with 

 two whorls of branches. Hab. — Denmark ; Germany ; Italy. Terrestrial. 



This is a very marked species, on account of the peculiar arrangement of the 

 branches of the salivary glands ; these branches form two sets, which are inserted 

 on to the duct of the organ at the same level, in segments iv, v ; another remarkable 

 character of the species is in the presence of dilatations of the dorsal vessel in 

 segments v, vi, and vii; this suggests, as Michaelsen has pointed out, that the 

 dorsal vessel is ante-clitellian in origin, since such swellings seem to be invariably 

 found at the commencement of the dorsal vessel. Vbjdovsky's figure of the male 

 efferent organs (3 PI. viii. fig. 9) looks as if there were no spermiducal glands; 

 he figures a number of strands which suggest retractor muscles attached to the 

 integument round the external orifice of the duct. These important differences from 

 other species of Fridericia almost seem to necessitate the creation of a new genus. 

 The brain is convex behind ; it is nearly twice as long as broad. There are three 

 perivisceral trunks uniting the dorsal and ventral vessels : the two anterior of these 

 spring from a common trunk, which is very, short. 



