SCOLECIFORMIA. 



489 



vb 



Fam. 4. Scalibregmidae.* Scalibregma Rathke ; Eumenia Oerst.; Sclero- 

 cheilus Gr.; Lipobranchius Cunn. and Ram. 



Fam. 5. Chlorhaemidaef (Pherusidae). Elongated cylindrical body with green 

 blood (due to chlorocruorin). Prestomium with a pair of long processes (? palps) 

 and several green tentacles arranged in a transverse row and acting as gills. 

 Peristomium achaetous. The head can be withdrawn into the body. The setae 

 of the anterior segments are long and directed forwards. Skin papillated. Only 

 one or two coelomic septa, and two or four nephridia. Flabelligera, Sars (Siphon- 

 ostoma Voigt ; Chlorhaema Duj.); F. affinis Sars, transparent body- wall, skin 

 with long papillae, which traverse a thick jelly-like envelope secreted by it, 

 under stones at low tide ; Trophonia M. -Edw. 

 (Pkerusa Blv.) ; Brada Stimp.; Buskiella Mclnt.; 

 Stylarioides D. Ch. 



Fam. 6. Sternaspidae. J Body short, ante- 

 rior region thickened and carrying on each 

 side 3 rows of setae ; on the ventral surface 

 of the hind end there is a bilobed horny plate, 

 round the edges of which are placed a number 

 of bundles of long setae. Mouth overhung by 

 a small knob -like prestomium ; anus on a 

 papilla dorsal to the horny shield. Two 

 bundles of filamentous branchiae just anterior 

 to, and on each side of the anus on the dorsal 

 surface. About 30 segments ; segments 2, 3, 4 

 have a row of strong setae on each side, seg- 

 ments 5, 6, 7 are without setae, segments 8-15 

 have setae which do not pierce the cuticle ; 

 the remaining segments are marked by the 

 bundles of long setae round the horny plate. 

 Coelomic septa absent ; alimentary canal coiled ; 

 one pair of nephridia attached to the skin between 

 segments 6 and 7, and opening internally. Pro- 

 jecting externally between segments 8 and 9 on 

 the ventral surface are two processes which con- 

 tain the terminal parts of the generative ducts. 

 The generative organ is a sac which communicates 

 with the visceral coelom by a narrow canal ; the 

 walls of the sac are continued into the two gener- 

 ative ducts. Sternaspis Otto, S. scutata Ranzani, 

 Mediterranean. 



FIG. 399. Sternaspis scutata, ven- 

 tral view x 2 (after Vejdov- 

 sky). The segments in front 

 of the shield are numbered 

 I-XV. K branchial filaments ; 

 Ir processes containing the 

 generative ducts; m mouth; 

 rb, sb, eb, setae of horny shield ; 

 vb rows of setae on segments 

 1 1, III, I F. 



* Levinsen, Syst. geog. Overs, over, de Nord. Annul {Vidensk. Meddelser) for 

 1883, Copenhague, 1884, p. 130. 



t E. Grube, " Mitth. iiber d. Fam. Chlorhaemiden," Sitz. ber. d. Schlesischen 

 Gesellschaft, Breslau, 1876. 



J Vejdovsky, " Vk. Akad. Wien, 43, 1882. Rietsch, Ann. Sci. Nat. (6), 

 13, 1882. Goodrich, Q. J. M. S., 40, p. 233. 



