ANNULATA. 231 



Sp. Tubifex rivulorum, Lumbricus tubifex MUELL. ; TREMBLEY Polypes, PL 7 ; 

 fig. i ; Encyclop. meth., Vers. PL 34, figs. 47 j MUELL. ZooL dan. Tab. 84, 

 figs. 1,2. This reddish little worm lives at the bottom of ponds and becks ; 

 by the union of many accumulated worms of this species red spots are 

 caused at the bottom of the water, which, on being touched, immediately 

 vanish, for the worms hide themselves in the ground. 



Scenuris HoFFMEiSTER. Upper lip exsert, spoon-shaped. Cli- 

 tellum little, distinct. Four fasciculi of five to eight setae in each 

 ring. 



Comp. HOFFMEISTER Des vermibus quibusdam, ad genus Lumbricorum 

 pertinentibus, 4to. Berolini, 1842. 



Lunibriculus GRUBE. Body round, with four rows of double 

 aciculse. Mouth inferior; a lobule resembling an upper lip, not 

 distinct from the following segment. Cingulum none. Segments 

 of the body numerous. 



Sp. Lumbriculus variegatus (Lumbricus variegatus MUELL.?) GRUBE in 

 ERICHSON'S Arckivf. naturgesch. 1844, s. 200 207, Taf. vii. fig. 2 ; about 

 two inches in length ; through the transparent skin the motions of the 

 dorsal vessel full of red blood, and of its blind digitiform lateral appendages 

 which contract and expand in every segment, may be seen. 



Sub-genus Euaxes GRUBE (Rhynchelmis HOFFM.). First segment 

 (head) elongate, sometimes produced into a long thread. 



Sp. Euaxes Jilirostris GRUBE, ERICHSON'S Archiv. 1844, pp. 204 207, Taf. 

 vii. fig. i, in fresh-water like the former ; 3^ inches long. Euaxes obtusi- 

 rostris MENGE, ERICHSON'S Archiv. 1845, Taf. in. fig. i. 



Lumbricus L. (exclusive of species). Enterion and Hypogceon 

 SAV. Body cylindraceous, attenuated at both extremities, obtuse 

 posteriorly. Mouth sub-terminal, under the exsert upper lip. 

 Setae not retractile, disposed in longitudinal rows. Clitellum or 

 cingulum, L e. a tumid fleshy glandular zone mostly composed of a 

 various number of rings in the anterior part of the body (saddle or 

 girdle). 



Of this genus there are different species in Europe which were 

 formerly confounded under the name of Lumbricus terrestris. See 

 S AVION Y Analyse d'un Mem. sur les Lombrics, Comptes rendus des 

 travaux de PInstitut. 1820; DUGES Ann. des Sc. nat. xv. 1828, 

 pp. 289 294:, ibid. sec. ser. ZooL vm. 1837, pp. 18 25; FITZINGER, 

 in OKEN'S Isis, 1833, pp. 549 553 ; HOFFMEISTER Diss. de Vermibus 

 quibusdam ad genus lumbricorum pertinentibus. Berolini, 1842, 

 (ERICHSON'S Archiv f. Naturgesch. 1843, p. 183); the same: Die 



