BEPOET ON L.M.B.C. NEMERTINES. 357 



Order II.— MESONEMEKTINI, Burger. 

 Family Cephalothricid^. 



Gephalothrix bioculata, Oersted. 



Besides being commonly found on the shore under 

 stones and among weeds, this species was occasionally 

 dredged near Port Erin in about 15 fathoms. 



Order III.— METANEMEKTINI, Burger. 

 Family Amphipomm;. 



Amphiporus pulcher (Johnston), M'Intosh. 



This well marked species was found to be fairly abundant 

 on the shelly ground off Port Erin in 15 to 20 fathoms ; 

 it has also been dredged in the neighbourhood of Spanish 

 Head on several occasions. 



The average length was 3 cm., the largest specimen 

 measuring 5 cm. All were of a uniform deep salmon 

 colour ; no example with conspicuous gonads like the one 

 figured by M'Intosh being met with. They were fre- 

 quently observed with the head telescoped into the anterior 

 part of the body as described by M'Intosh, and the larger 

 ones swam vigorously when irritated. Amphiporus 

 pulcher is readily distinguished from A . dissimulans and 

 A. lactifloreus not only by the possession of a reserve 

 central stylet and by the different position of the side- 

 organs but also by external characters : the broad oar-like 

 shape of the posterior half of the body, the large distinct 

 eyes not arranged in definite groups like those of A. 

 lactifloreus, and especially the secondary grooves running 

 forward from the anterior cephalic furrows ; the. course of 

 the latter on the ventral surface is more transverse than 

 in the other two species referred to, so that they meet in 

 the middle line some distance behind the mouth-opening; 



