510 RETORT ON ZOOLOGY, MDCCCXLIV. 



five to eight together. To the genus Lumbricus are assigned 

 the six species : Lumb. ayricola, rubellus, anatomicus, riparius, 

 olidus, and ayllls i all of which occur in North Germany. To 

 Enchytreeus albidus, Hcul., to which Lumb. vermicularis, 

 Miill., is said to belong, Hoffmeister has added, besides, the 

 Ench. Galba ; Rhynchelmis limoseUa and Haplotaxis Meukeana 

 are interesting on account of their long upper lip. Scenuris 

 varieyata and lineata are said to be identical with Miiller's 

 Lumbricus varieyatus and Hneatus, which the Reporter doubts, 

 because, according to Hoffmeister (Dissert, p. 11), Seen. 

 varieyata inserts itself into the mud, and Avaggles about with 

 the projecting caudal extremity, which Lumbr. varieyatus, 

 Miill., never does. Seen, varieyata is certainly identical with 

 Lumbr. tubifex, at all events, with the worm figured by 

 Schaffer (vid. his Memoir : Die griinen Armpolypen, die 

 Wasserflohe und eiue besoudere Art kleiner Wasseraale, 

 Taf. iii), which last supposition has also been broached by 

 Grube. (Archiv, 1841, Bd. i, p. 213.) The latter naturalist 

 describes a new worm under the name of Lumbricus varie- 

 yatus (ib. p. 198), which is most probably the Lumbr. varie- 

 yatus of Miiller. This worm is remarkable by its vascular 

 system. The dorsal vessel in it, at each segment, gives off' 

 a branch at right angles, which terminates in a digitate 

 manner in crecal twigs, as in fact Treviranus had already 

 noticed (Beobachtungeu aus der Zootomie und Physiologic, 

 1839, p. 59) in the Lumbricus varieyatus of Miiller. Grube 

 recognised a vascular system, in all respects similar, also in 

 Euaxes filirostis, which new genus he characterizes by a 

 long, uiijointed proboscis and the want of a clitellum. Bock 

 also (Isis, 18-13, p. 287) expresses himself with respect to 

 the uncertain characters of the species of Earthworm, insti- 

 tuted by Savigny and Duges, and maintains that he has 

 observed seven different species of the genus Lumbricus in 

 Norway. 



In a marine worm allied to Nais Quatrcfages (Comptes 

 rendus, 1841, p. 193 ; or Froriep's n. Notiz. Nr. 674, p. 215) 

 observed three eyes on the head, and besides these also an eye 

 on each side of each segment of the body, together witli rudi- 



