512 THE NATURAL HISTORY EEVIEW. 



We have frequently met with fine large specimens of G. punctata, 

 in which there was no such marked difierence in the somites. Of the 

 Syllidea, we have the genus Syllisy a new genus Oattiola, My- 

 rianida and Joida. This important family has lately been reduced into 

 order by Ehlers,* and we feel some surprise that his researches are 

 not alluded to in the Appendix, the more especially as the position 

 of the new genus Gattiola could have been easily decided. We give 

 the divisions of this family according to Ehlers, adding the species 

 at present known as British. 



A. Syllidea with Palpi. 

 I. Eirst segment, without tufts of bristles. 



1. First segment always with more than two tentacular 

 cirri. Procome, Ehlers. 



2. Pirst segment always with two tentacular cirri. 



Gnathosyllis, Schmarda. 

 Odontosyllis, Clprd. 

 Pterosyllis, Clprd. 



At the entrance of the tubular oesophagus, only 

 soft papillae, the armature at most a single tooth. 



a Palpi quite or partially divided, central cirri present. 

 Syllis, Savigny. S. armillaris, Oersted. 



S. cornuta, EatliJce, 

 S. ? monoceros, Daly ell. 

 It is impossible, from the wretched description of this species, to 

 assign it to its proper place. 



S. tubifex, Gosse. This 

 species was described in Annals and Magazine of Natural History, 

 2nd Series, Vol. 16. Habitat, Ilfracombe. It is not alluded to in the 

 present work. 



/3. Palpi coadnate. Central cirri wanting. 

 Sylline, Grube. 



3. Pirst segment, with but one tentacular cirrus, ventral 

 cirri absent. 



a Microsyllis, Clprd. 

 b Exotocas, Ehlers. 



4. Pirst segment without tentacular cirri, ventral cirri 

 present. 



Exogone, Oersted. E. longiseta, Gosse. This spe- 



* Die Borstenwurmer. Von E. Ehlers, M.D. Leipzig, 1864. .iii>:jp3ii: - 



