ANNULATA. 231 
Sp. Tubifex rivulorum, Lumbricus tubifex MUELL. ; TREMBLEY Polypes, Pl. 7; 
fig. 2; Encyclop. méth., Vers. Pl. 34, figs. 4—7; 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. 
Senuris HOFFMEISTER. Upper lip exsert, spoon-shaped. Cli- 
tellum little, distinct. our fasciculi of five to eight setee in each 
ring. 
Comp. HorrmnisterR Des vermibus quibusdam ad genus Lumbricorum 
pertinentibus, 4t0. Berolini, 1842. 
LIumbriculus GruBE. Body round, with four rows of double 
acicule. 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 Muruu.?) GRUBE in 
Ericuson’s Archiv f. naturgesch. 1844, 8. 200—207, Taf. vil. 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 Huaxes GRUBE (Lthynchelmis Horrm.). First segment 
(head) elongate, sometimes produced into a long thread. 
Sp. Euaxes jfilirosiris GRUBE, ERtcHson’s Archiv. 1844, pp. 204—207, Taf. 
vil. fig. 1, in fresh-water like the former ; 33 inches long. uazxes obtus- 
rostris MENGE, ERIcHSON’s Archiv, 1845, Taf. 111. fig. 1. 
Iumbricus 1. (exclusive of species). Enterion and Hypogeon 
Say. Body cylindraceous, attenuated at both extremities, obtuse 
posteriorly. Mouth sub-terminal, under the exsert upper lip. 
Sete not retractile, disposed in longitudinal rows. Clitellum or 
cingulum, ¢.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 
Savieny Analyse @un Mem. sur les Lombrics, Comptes rendus des 
travaux de UInstitut. 1820; Duces Ann. des Se. nat. xv. 1828, 
pp. 289—294, ibid. sec. ser. Zool. vit. 1837, pp. 18—25 ; Frrzincur, 
in OxeEn’s Jsis, 1833, pp. 549—553 ; Horrmetster Diss. de Vermibus 
quibusdam ad genus lumbricorum pertinentibus. Berolini, 1842, 
(Ericuson’s Archiv f- Naturgesch. 1843, p. 183); the same: Die 
