208 THE GENERA OF NEMERTEANS. 



whereas a few specimens — perhaps in coincidence with 

 the spawning season — had turned to a light yellowish fawn 

 colour. The proboscis is furnished with urticating organs. 



4. Carinella polymorpha (Renier) Hubr. 

 Synon. Valencinia splendida Quatref. 



Tubulanus polymorphus Renier. 

 Differing from the foregoing species by the form of the 

 head which is still wider and more hammershaped as well 

 as by the colour, which is always a uniform reddish or 

 orange brown. In spirits the part of the body posterior 

 to the oesophagus generally presents a darker colour than 

 the anterior part. 



Familia Valenciniaidae mihi. 



Nerves just within the muscles of the body-wall , sepa- 

 rated from the epiderm by only a thin layer. No cephalic 

 furrows or fissures , but a small opening an each side of 

 the head leading by a ciliated duct into the posterior lobe 

 of the ganglion. 



Genus Valencinia Quatrefages. The opening for the pro- 

 boscis far behind the tip of the snout. 



5. Valencinia longirostris Quatrefages. 

 Synon. Valencinia lineformis Mac Int. 



Colour white with a roseate hue, which is occasionally 

 stronger anteriorly. No eyes in the specimens I had occa- 

 sion to examine. Head pointed , though rarely so much as 

 in Quatrefages' figure of the species. Specimens at Naples 

 did not exceed 1 dm. in length. They were generally coiled 

 together in knots, though not very long themselves. 



Family P oliaidae mihi. 



Lateral nerves within the muscles of the body wall. A 

 pair of posterior lobes to the ganglion are coalesced with 

 the inner and hinder surface of the superior lobes. 



Notes from the Ley den ]VIu.seutii. 



