64 LUMBRICID^. 



Desc. Worm an inch in length, filiform, narrowed at both ends, 

 white, smooth and glossy, annulose, the segments longer than their 

 diameter, most distinctly defined at the extremities. Head obtuse, 

 semiovate ; the mouth inferior, between the first and second seg- 

 ments. Anal segment truncate, the vent round, wide and terminal. 

 Spinets very short, proportionably stout, 3 to 5 in each fascicle. 

 There is, on most specimens, a milk-white spot near the first third 

 of the body, which seems rather to indicate the position of the 

 stomach than to be a clitellus. The intestine is much convoluted 

 and divided by strictures corresponding to those in the skin. 



(a) Berwickshire, Dr. Johnston. 



3. SiENURIS, Hoffmeister, 1843. 

 Ssenuris, Hoffmeister, Ann. Nat. Hist. xii. 432. Grube, Fam. 103. 

 Char. Body filiform, smooth, distinctly segmented, the segments 

 separated by a simple line ; armed with spinets only in four small 

 fascicles, which are consequently quadriserial, a series along each 

 side and one on each ventral margin : spinets slightly curved, from 

 3 to 9 in a fascicle, the segments towards each extremity having 

 fewest : head a small conoid lobe : mouth between it and the second 

 segment, eproboscidian : anus terminal. Blood red : no muscular 

 stomach. Tenants of wet mud or sand. 



* Freshwater. 



1 . S. tubifex, dorsal blood-vessel simple ; tubicolous. 



Sommerwormes, Mouf. Theatr. Insect. 325. 



Vermes minimi rubri aquam stagnalem colore sanguineo infieientes, 



unde valgus dira portendit, Merret, Pinaw, 207. 

 Vers qu'on trouvent souvent rassembles en grande quantite au fond 



de I'eau, Tremhley, Polyp. 98, 99, 105 & 147. pi. 7. f. 2. 

 Vers qui se tiennent dans des fourreaux faits de boue. Bonnet, In- 



sectol. ii. 208. pi. 2. f. 9, 10. 

 Small red Water-worms found plentifully in the mud of the river 



Thames, Baker, Polype, Q2. 

 Lumbricus tubifex, Milll. Zool. Dan. Prod. 2605; Wurm. 102; Verm. 



i. ii. 27; Zool. Dan. iii. 4. tab. 84. f. 1, 2. Bosc, Vers, i. 255. 

 Lumbricus rivalis?. Fabric. Faun. Grant. 278. 

 Tubifex rivulorum, Lam. An. s. Vert. v. 225; 2de edit. iii. 676. 



Blainv. Diet, des Sc. nat. Ivii. 497 ; Atlas, pi. fig. 5. Templeton 



in Loud. Mag. Nat. Hist. ix. 235. Schweigg. Handb. 590. 

 Freshwater Polypus, Loudon's Mag. Nat. Hist. v. 387-388 & viii. 



620. 

 Saenuris variegata?, Hoffmeister, De Vermib. 9. t. 1. f. 29, t. 2. f. 19, 



20, 21 ; Ann. Nat. Hist. xii. 432. Rep. Zool. Ray Soc. 1843, 510. 



Hab. Common in shallow ditches with a bottom of fine mud, in 

 which the worm constructs an erect cylindrical tube for its pro- 

 tection. Gregarious. 



