EUROPEAN NEMERTEANS. 9? 



• Another new species from the Bay of Naples belongs to 

 the suborder of Schizonemertini. I may be allowed 

 to dedicate it to the able manager of the Laboratory at 

 Naples , to whose kind assistance I am indebted for so 

 much valuable material. 



Cerebratulus eisigii n. sp. 



May be distinguished from all other species of the same 

 genus by its proboscis , which is longitudinally striped. Ge- 

 nerally the proboscis is white or of a very faint reddish 

 hue, Cerehratuhis hepaticus shows some broad and some 

 thinner dark brown transverse bands near its implantation 

 but a species with longitudinal stripes along the proboscis 

 was not known as yet. Moreover the coloration differs 

 from that of other species, the animal being of a wholly 

 uniform dark olive green , even inclusive of the tip of 

 the head. Only the inner surface of the respiratory clefts 

 is white and so when these are closed a faint white bor- 

 dering line betrays their position. Posteriorly the colour 

 of the specimen examined was somewhat more mixed up 

 with a reddish tinge. 



The ground-colour of the proboscis is a light dirty 

 green , the longitudinal stripes are dark brown and not 

 quite straight but with very faint zigzag bends. Ema- 

 nating from each angle of this zigzag line a very short 

 transverse streak , vertical to the direction of the longitu- 

 dinal stripes and about half as long as its own distance 

 from the next transverse streak, was visible with the mi- 

 coscope. 



The specimen was not entire and so its exact length 

 could not be determined, nor whether a short caudal ap- 

 pendage was present. 



Its width was about 4 mm. in a line with the mouth, 

 the length of the mouth 3 mm. , that of the respiratory 

 slits é'/j mm. 



Notes from the Leydeu Aluseuxn , Vol. II. 



