NEMERTINES OF PLYMOUTH SOUND. 21 
agreed with the figure given by McIntosh either in colour or in general 
appearance. 
The length varied from 8 mm. to 3 cm. The ground colour was 
a yellowish brown. This on the dorsal surface was covered by a 
thick uniform sprinkling of reddish-brown grains of pigment. The 
cephalic grooves were very pronounced. ‘The region included between 
the anterior and posterior grooves was rendered conspicuous dorsally 
by the strong development of the reddish-brown pigment, which was 
here in the form of thick lines radiating forwards in all direc- 
tions from a median and posterior point. ‘The head, which was 
broad and conspicuous, in front of the anterior grooves was covered 
superficially on each side by large flakes of white pigment, which 
reappeared at the posterior end of the body, covering the tail. 
The anterior eyes were red, large, and irregularly triangular ; 
the posterior were much smaller and rounder, and were generally 
closer together than the anterior, though there was sometimes little 
difference in this respect. The right and left lobes of the snout 
were very conspicuous, but the transverse dorsal lobe was more diffi- 
cult to make out. 
The stylet region of the proboscis, which is very characteristic, 
entirely agreed with the figure given by McIntosh. 
The shape of the body renders this species at once recognisable. 
It is constricted behind the posterior grooves, gradually increases in 
girth up to the middle of its length, and from thence tapers to 
the tail. 
Ripe specimens have been met with in the spring, but I have 
never seen a female with developing eggs. 
Hubrecht did not find this species at Naples, but it was found at 
Trieste by Dewoletzky. It is rare at Roscoff (Joubin), 
Family NEMERTIDAS, Hubrecht. 
Genus NEMERTES, Cuvier. 
20. N. eracitis, Johnston. 
Not uncommon. Almost restricted to the Breakwater, where it is 
found at low tide among the roots of Laminaria and in the cavities 
of stones. It has a wide distribution, ranging from the north of 
England to Madeira. 
