160 AMPHINOME ROSTRATA. 



bristles , showing some parts irregularly thickened and others 

 dissolved in fibres. The ventral bristles of A. rostrata are 

 furnished at the tip with a dark brown point, placed like 

 a cap on the summit of the bristle ; beneath this tip , 

 having undoubtedly more resistance , the bristle shows often 

 the herefore described alteration of its structure. Our spe- 

 cimen from the Paris Museum shows the same phenome- 

 non , resembling the bristles , figured on pi. 8 bis , fig. 1 b 

 and c in Cuvier's Règue animal. The form mentioned by 

 M'Intosh under the name of A. vagans ^) was afterwards 

 recognized by him to be the Eurythoë boreaUs of Sars ~). 

 I regret to be unacquainted with the description and figures 

 of A. vagans , given by Kinberg in the »Fregatt. Eugen. 

 Resa"; most of the copies of this work seem only to con- 

 tain 8 plates, with illustrations of the Polynoidae. 



Amphinome longosetosa , n. sp. (PI. 7, fig. 16; PI. 8, 

 figs. 1 — 5). 



I found in our collection a bottle containing two Am- 

 phinome-specimens , which are strikingly distinguished by 

 the enormous length of their capillary bristles. In other 

 respects they agree so much with A. rostrata , that I hesi- 

 tated a long time to consider them as a distinct species. I 

 first supposed that it should perhaps be a sexual variation 

 and represent an epitocous form ; but as we have a large 

 and a small specimen showing this character , and I cannot 

 find any notice about such bristles in the different authors , 

 I have given up my supposition. 



The large specimen measures 200 mm. in length , its 

 greatest breadth is 20 mm. and the number of segments 

 amounts to 68 ; the small one has only a length of 100 

 mm. and is 9 mm. broad. 



The entire surface of the body is coarsely rugose, showing 



1) On the structure of the British Nemerteans and some new Brit. Annelids; 

 Trans. R. Soc. of Edinburgh, Vol. XXV, 1868—69, p. 406, pi. XV, fig. 1. 



2) On British Annelida , Trans. Zool. Soc. vol. IX. 



Notes from the Leycleii Mtiseum, "Vol. "VIII. 



