70 NAIDES. 



7. ST YL ARIA. 



Stylaria, Lam. An. s. Vert. iii. 223 (1816). Ehrenberg hi Lam. An. 

 s. Vert. 2cle edit. iii. 612. Oersted in lib. cit. 133. 



Char. Body linear, round, flattish in front: four first segments 

 divided by a stricture from the body, and the first or head prolonged 

 into a filiform appendage : eyes 2 : superior bristles capillary, pro- 

 truded ; the inferior forked spinets. 



1 . S. lacustris. 



Mille-pied a dard, Trembley, Polyp. 144. pi. 6. f. 1, 



A very small and slender Worm, Baker, Employm. Microse. 317- 



pi. 12. f. 24. 

 Nereis lacustris, Linn. Syst. 1085. Rossel, Insect, iii. 477- tab. 78. 



f. 15 a, 16, 17, 18^, h, i; tab. 79. f. 1. Penri. Biit. Zool. iv. 46. 

 Nais proboscidea, Mull. Wurm. 14. tab. 1. f. 1-4; Zool. Dan. Prod. 



no. 2649; Verm. i. ii. 21. Turt. Gmel. iv. 91; Brit. Faun. 137. 



Stew. Elem. i. 390. Blumenb. Man. 246. Penn. Brit. Zool. iv. 



97(1812). Blainv.Dict.W\i.A99,,Atlas,'p\.^g.3. Dalyell,Pow. 



Great, n. 131.pl. 17. f. 6, 7- 

 Stylaria paludosa, Lam. An. s. Vert. iii. 224 ; 2de edit. iii. G!]5. 



Oersted, sup. cit. 133. pi. 3. f. 5. 

 Stylaria lacustris, Templeton in Loud. Mag. Nat. Hist. ix. 235. 



Hah. About the roots of aquatic plants. 



Obs. Length 6-7'" ; segments 60-70 ; the middle ones nearly 

 twice as broad as long, regularly decreasing backwards ; superior 

 bristles twice as long as the breadth of the body, the inferior unci- 

 nate, with an incisure about the middle. 



8. SERPENTINA. 

 Serpentina, Oersted, lib. cit. 134 (1843). 

 Char. Body linear, round, not flattened in front : the head angui- 

 form, with a produced lower lip : eyes 2 : superior bristles subulate, 

 the inferior forked or uncinate. 



1 . S. quadristriata. 



Nais serpentina, Mull. Wurm. 84. tab. 4. f. 1-4 ; Verm. i. ii. 20. Turt. 



Gmel. iv. 91 ; Brit. Faun. 137. Steiv. Elem. i. 390. Pe7in. Brit. 



Zool. iv. 97 (1812). Lam. An. s. Vert. iii. 223; 2de edit. iii. 674. 



Templeton in Loud. Mag. Nat. Hist. vii. 130. f. 26 & ix. 235. 

 Serpentina quadristriata. Oersted, Naturli. Tidssk. 1843, 134, pi. 3. 



f. 3. Rep. Zool. Ray Soc. 1845, 282. 



Hab. In ditches amongst duck-weed. 



Obs. The spinets (inferior bristles) have a globular swelHng a little 

 below the middle. The superior are geminate, subulate, and strong. 

 Length of the body 16-18", composed of eighty to ninety segments : 

 head mai-ked with four dark transverse fasciae. 



